KR940000250B1 - Signal transmitting device of door phone - Google Patents

Signal transmitting device of door phone Download PDF

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Publication number
KR940000250B1
KR940000250B1 KR1019890019911A KR890019911A KR940000250B1 KR 940000250 B1 KR940000250 B1 KR 940000250B1 KR 1019890019911 A KR1019890019911 A KR 1019890019911A KR 890019911 A KR890019911 A KR 890019911A KR 940000250 B1 KR940000250 B1 KR 940000250B1
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KR
South Korea
Prior art keywords
signal
output
mosquito
voice
pass filter
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KR1019890019911A
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Korean (ko)
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KR910013025A (en
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최현종
김의덕
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주식회사 금성사
이헌조
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Priority to KR1019890019911A priority Critical patent/KR940000250B1/en
Priority to DE4042088A priority patent/DE4042088A1/en
Priority to JP2416000A priority patent/JPH04140953A/en
Priority to GB9028152A priority patent/GB2239581A/en
Publication of KR910013025A publication Critical patent/KR910013025A/en
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Publication of KR940000250B1 publication Critical patent/KR940000250B1/en

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • G08C15/02—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path simultaneously, i.e. using frequency division
    • G08C15/04—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path simultaneously, i.e. using frequency division the signals being modulated on carrier frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025—Door telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186—Video door telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5437—Wired telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/545—Audio/video application, e.g. interphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/547—Systems for power line communications via DC power distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing

Abstract

The device is arranged so that signal frequencies of a voice signal and image signal are separated between an indoor parent device (A) and a child device (B) on a front gate. The image signal from camera (3), the voice signal from microphone (5), a synchronization signal and a low frequency power are superposed, and the four signals simultaneously are transmitted through a single line, so that installation of the door phone becomes convenient, resulting in low cost and higher reliability.

Description

도어폰의 신호 전송장치Signal Transmitter of Door Phone

제1도는 종래 도어폰의 신호 전송장치 구성의 개략도.1 is a schematic diagram of a signal transmitter of a conventional door phone.

제2도는 본 발명에 따른 도어폰의 신호 전송장치 구성의 개략도.2 is a schematic diagram of a signal transmitter of the door phone according to the present invention;

제3도는 본 발명에 따른 도어폰의 신호 전송장치의 상세블록도3 is a detailed block diagram of a signal transmission device for a door phone according to the present invention.

제4도는 본 발명에 따른 각 신호 파형도.4 is a waveform diagram of each signal according to the present invention.

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

A : 모기 B : 자기A: Mosquito B: Magnetic

1 : 모니터 2 : 송수화기1: monitor 2: handset

3 : 카메라 4 : 스피커3: camera 4: speaker

5 : 마이크 6 : 스위치5: microphone 6: switch

7 : 부저 10 : 트랜스7: buzzer 10: trance

11 : 정류기 12,31 : 중첩회로11: rectifier 12,31: overlapping circuit

13 : 동기신호 발생기 14 : 송화기13 synchronization signal generator 14 transmitter

15,20,24,28,32,35,40 : 로우패스필터 16,34 : 변조기15,20,24,28,32,35,40 Low pass filter 16,34 Modulator

17,22,33,38 : 하이패스필터 18,37 : 반송파 발생기17,22,33,38: high pass filter 18,37: carrier generator

19 : 모니터 21 : 직류차단기19 monitor 21 DC circuit breaker

23,39 : 복조기 25 : 증폭기23,39: demodulator 25: amplifier

26 : 수화기 27 : 전송선로26: handset 27: transmission line

29 : 카메라 30 : 동기분리부29: camera 30: synchronization separation unit

36 : 마이크 41 : 스피커36: microphone 41: speaker

42 : 스위치 드라이버 43 : 디코더42: switch driver 43: decoder

44 : 스위치 45 : 코드신호 발생기44: switch 45: code signal generator

51 : 전원부 52, 57 : 음성변조부51: power supply unit 52, 57: voice modulation unit

53 : 코드신호 처리부 54 : 연상신호 처리부53: code signal processing unit 54: associative signal processing unit

55,58 : 음성처리부 56 : 코드신호 발생부55, 58: voice processing unit 56: code signal generator

본 발명은 도어폰의 신호 전송장치에 관한 것으로, 특히 집안에 설치도는 모기(母機)와 대문에 설치되는 자기(子機) 사이에 한 회선으로 영상신호, 음성신호전원 및 동기신호를 동시에 전송할 수 있도록 한 도어폰의 신호 전송장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal transmission device of a door phone, and in particular, a video signal, a voice signal power supply, and a synchronization signal are simultaneously transmitted on a line between a mosquito installed in a house and a porcelain installed at a gate. It relates to a signal transmission device of one door phone.

제1도는 종래의 도어폰 신호 전송장치의 개략도로서, 이에 도시된 바와같이 집안에 설치되는 모기(A)에 송수화기(2), 부저(7) 및 모니터(1)를 두고, 대문에 설치되는 자기(B)에 카메라(3), 스피커(4), 마이크(5) 및 스위치(6)를 두며, 상기 모기(A) 및 자기(B) 사이에 영상신호선(L1), 음성신호선(L2), 전원선(L3), 동기신호선(L4), 및 접지선(L5)이 연결되어 구성된 것으로, 이 종래 장치의 동작과정을 설명한다.FIG. 1 is a schematic diagram of a conventional door phone signal transmission apparatus. As shown therein, a handset 2, a buzzer 7 and a monitor 1 are placed in a mosquito A installed in a house, A camera 3, a speaker 4, a microphone 5, and a switch 6 are arranged in (B), and the video signal line L 1 and the audio signal line L 2 between the mosquito A and the magnet B. ), The power supply line L 3 , the synchronization signal line L 4 , and the ground line L 5 are connected to each other, and an operation process of the conventional apparatus will be described.

대문에서 자기(B)의 스위치(6)를 누르면, 모기(A)의 모니터(1)가 동작하고, 또한 부저(7)가 울리게 되며, 이때 집안에서 송수화기(2)를 들면 자기(B)의 카메라(3)에서 잡힌 화상이 모기(A)의 모니터(1)에 나타나므로 상대방을 확인할 수 있고, 그 상대방의 음성신호는 자기(B)의 마이크(5)를 통해 모기(A)의 송수화기(2)로 전달되어 출력되고, 모기(A)에서의 음성신호는 송수화기(2)를 통해 자기(B)에 전달되어 스피커(4)로 출력된다. 여기서 모기(A)와 자기(B) 사이의 신호전달을 살펴보면, 영상신호는 영상신호선(L1)을 통해 전달되고, 음성신호는 음성신호선(L2)을 통해 전달되며, 전원은 전원선(L3)을 통해 공급되고, 모기(A)의 동기신호는 동기신호선(L4)을 통해 자기(B)로 공급되며, 접지신호는 접지선(L5)을 통해 전달된다.When the switch 6 of the magnetic B is pressed from the gate, the monitor 1 of the mosquito A operates and the buzzer 7 rings, and when the handset 2 is lifted in the house, the magnetic B of the magnetic B Since the image captured by the camera 3 appears on the monitor 1 of the mosquito A, the other party can be identified, and the voice signal of the other party is transmitted through the microphone 5 of the self B. 2) is transmitted and output, the voice signal from the mosquito (A) is transmitted to the magnet (B) through the handset 2 is output to the speaker (4). Here, looking at the signal transmission between the mosquito (A) and the magnetism (B), the video signal is transmitted through the video signal line (L 1 ), the audio signal is transmitted through the audio signal line (L 2 ), the power supply line ( L 3 ) is supplied, the synchronization signal of the mosquito A is supplied to the magnet B through the synchronization signal line L 4 , and the ground signal is transmitted through the ground line L 5 .

일반적으로 도어폰을 설치시는 집안의 방에는 모기(A)를, 대문에는 자기(B)를 설치해야 되는데, 종래에는 모기와 자기사이에 신호전달을 위해서 신호선이 5개 회선이 필요하게 됨으로써 가격이 상승되고, 설치작업이 복잡해지는 등의 문제점이 있었다.In general, when the door phone is installed, a mosquito (A) is installed in the room of the house, and a magnetic (B) must be installed in the door. In the past, five signal lines are required for signal transmission between the mosquito and the child. There was a problem that the rise, the installation work is complicated.

본 발명은 이와같은 종래의 문제점을 감안하여, 모기와 자기사이에 2개의 신호선만을 통해 신호를 전송할 수 있게 창안한 것으로, 이를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.In view of the above-described problems, the present invention has been made so that signals can be transmitted between only two signal lines between a mosquito and its own, which will be described in detail with reference to the accompanying drawings.

제2도는 본 발명에 따른 도어폰 신호 전송장치의 구성 개략도로서, 이에 도시한 바와 같이 모니터(1), 송수화기(2) 및 부저(7)로 구성되어 집안에 설치되는 모기(A)와, 카메라(3), 스피커(4), 마이크(5) 및 스위치(6)로 구성되어 대문에 설치되는 자기(B) 사이에 신호선(L6) 및 접지선(L7)만을 통해 신호를 전송할 수 있게 구성한다.2 is a schematic configuration diagram of a door phone signal transmission device according to the present invention. As shown therein, a mosquito (A) and a camera, which are composed of a monitor (1), a handset (2), and a buzzer (7), are installed in a house, and (3), consisting of a speaker (4), a microphone (5) and a switch (6) configured to transmit signals only through the signal line (L 6 ) and ground line (L 7 ) between the magnetic (B) installed in the gate do.

제3도는 본 발명에 따른 도어폰 신호 저송장치의 상세블록도로서, 이에 도시한 바와 같이, 전원플러그에서의 교류전원을 트랜스(10)를 통해 강압하고 정류기(11)를 통해 정류하여 일정 직류전원을 공급하는 전원부(51)와, 송화기(14)의 출력신호를 로우패스필터(15)를 거치고 변조기(16)에서 반송파 발생기(18)의 반송파신호를 입력받아 변조한 후 하이패스필터(17)를 통해 출력하는 음성변조부(52)와, 상기 전원부(51)의 출력직류전원, 동기신호 발생기(13)에서 발생되어 출력되는 동기신호 및 상기 음성변조부(52)의 출력신호를 중첩하여 전송선로(27)로 출력하는 중첩회로(12)와, 자기(B)로 부터 상기 전송선로(27)를 통해 입력되는 신호에서 직류전압을 차단하는 직류차단기(21)와, 이 직류차단기(21)의 출력신호에서 코드신호를 디코더(43)를 통해 디코딩한 후 스위치 드라이버(42)에 의해 모니터 구동신호를 출력하는 코드신호 처리부(53)와, 상기 코드신호 처리부(53)의 모니터 구동신호에 의해 모니터(19)가 구동되고, 상기 직류차단기(21)의 출력 신호에서 영상신호를 로우패스필터(20)를 통해 그 모니터(19)에 표시하는 영상신호 처리부(54)와, 상기 직류차단기(21)의 출력신호에서 음성신호를 하이패스필터(22)를 통해 복조기(23)에서 복조한 후 로우패스필터(24) 및 증폭기(25)를 통해 수화기(26)로 출력하는 음성처리부(55)로 모기(A)를 구성한다.3 is a detailed block diagram of a door phone signal storage device according to the present invention. As shown in the drawing, AC power in the power plug is stepped down through the transformer 10 and rectified through the rectifier 11 to provide a constant DC power supply. The high pass filter 17 after modulating the output signal of the power supply unit 51 and the transmitter 14 through the low pass filter 15 and receiving the modulated carrier signal of the carrier generator 18 from the modulator 16. The transmission line overlaps the voice modulator 52 output through the control unit, the output DC power of the power supply unit 51, the sync signal generated by the sync signal generator 13, and the output signal of the voice modulator 52. The superimposed circuit 12 output to the furnace 27, the DC circuit breaker 21 which cuts off the DC voltage from the signal input from the magnetic B through the transmission line 27, and the DC circuit breaker 21 Decode the code signal from the output signal through the decoder 43 and then switch The monitor 19 is driven by the code signal processor 53 for outputting the monitor drive signal by the driver 42 and the monitor drive signal of the code signal processor 53, and the output signal of the DC circuit breaker 21 is driven. The video signal processor 54 displays the video signal on the monitor 19 through the low pass filter 20, and the audio signal from the output signal of the DC circuit breaker 21 through the high pass filter 22. After the demodulation at 23, the mosquito A is constituted by the voice processing unit 55 which is output to the receiver 26 through the low pass filter 24 and the amplifier 25.

또한, 상기 모기(A)로 부터 상기 전송선로(27)를 통해 입력되는 신호로 부터 전원을 분리해내는 로우패스필터(28) 및 동기신호를 분리해내는 동기분리부(30)와, 상기 로우패스필터(28)로 부터 전원을 입력받는 전원부(29a), 상기 동기분리부(30)로 부터 동기신호를 입력받는 동기신호부(29b), 고압발생회로(29c), 편향회로(29d) 및 촬상관(29e)으로 구성된 카메라(29)와, 스위치(44)의 상태에 따라 코드신호 발생기(45)에서 코드신호를 발생하는 코드신호 발생부(56)와, 마이크(36)의 출력신호를 로우패스필터(35)를 통하고 변조기(34)에서 반송파 발생기(37)의 반송파에 의해 변조한 후 하이패스필터(33)를 통해 출력하는 음성변조부(57)와, 상기 코드신호 발생부(56)의 코드신호, 상기 음성변조부(57)의 출력신호 및 상기 카메라(29)에서 출력되어 로우패스필터(32)를 통한 신호를 중첩하여 상기 전송선로(27)로 출력하는 중첩회로(31)와, 상기 전송선로(27)를 통해 입력되는 신호에서 음성신호를 하이패스필터(38)를 통해 복조기(39)에서 복조한 후 로우패스필터(40)를 통해 스피커(41)로 출력하는 음성처리부(58)로 자기(B)를 구성한다.In addition, the low pass filter 28 for separating the power from the signal input through the transmission line 27 from the mosquito (A) and the synchronous separation unit 30 for separating the synchronization signal, and the row A power supply unit 29a for receiving power from the pass filter 28, a synchronization signal unit 29b for receiving a synchronization signal from the synchronization separation unit 30, a high voltage generating circuit 29c, a deflection circuit 29d, and The output signal of the camera 29 composed of the imaging tube 29e, the code signal generator 56 which generates a code signal from the code signal generator 45 according to the state of the switch 44, and the microphone 36 is low. A voice modulator 57 and a code signal generator 56 which are modulated by the carrier of the carrier generator 37 in the modulator 34 and then output through the high pass filter 33 through the pass filter 35. Code signal), the output signal of the voice modulator 57 and the signal from the camera 29 to the signal through the low pass filter (32) The demodulator 39 demodulates the audio signal from the signal inputted through the superimposed circuit 31 and the signal input through the transmission line 27 through the high pass filter 38 and then low. The magnet B is configured by the audio processor 58 output to the speaker 41 through the pass filter 40.

이와같이 구성된 본 발명의 작용효과를 본 발명에 따른 각 신호파형도인 제4도를 참조하여 상세히 설명하면 다음과 같다.When described in detail with reference to Figure 4 of the signal waveform according to the present invention the effect of the present invention configured as described above are as follows.

제2도에서와 같이 모기(A)는 집안에 설치되고, 자기(B)는 대문에 설치되는데, 방문자등이 그 자기(B)의 스위치(6)를 누르면, 집안에 있는 모기(A)에서는 모니터(1)가 켜지면서 부저(7)에 부저음이 울리게 된다.As in FIG. 2, the mosquito A is installed in the house, and the magnet B is installed at the gate. When a visitor or the like presses the switch 6 of the self B, the mosquito A in the house is As the monitor 1 is turned on, a buzzer sounds at the buzzer 7.

이때 집안에 있는 사람이 송수화기(2)를 들어 서로 통화(음성)를 하게 되는데, 이때는 자기(B)의 카메라(3)에서 찍은 방문자 얼굴을 집안의 모기(A)로 송신하므로 집안사람은 모니터(1)에서 방문자를 보면서 송수화기(2)로 이야기할 수 있으며, 이때 음성신호, 영상신호 및 전원은 단지 하나의 신호선(L6)과 하나의 접지선(L7)으로 전송되므로 설치시 설치비용을 줄이고, 간편하게 설치할 수 있도록 한 것이다.At this time, people in the house pick up the handset (2) and talk to each other (voice). At this time, the visitor's face taken from the camera (3) of his (B) is transmitted to the mosquito (A) of the house, so the person in the house monitors ( You can talk to the handset (2) while watching the visitor in 1), where the audio signal, the video signal and the power are transmitted to only one signal line (L 6 ) and one ground line (L 7 ), thereby reducing the installation cost at the time of installation. Easy to install.

먼저, 모기(A)에서의 전원, 음성신호 및 동기신호를 중첩하는 과정을 설명하면, 전원플러그로 부터 입력되는 교류전원(AC)은 트랜스(10)를 통해 강압된 후 정류기(11)를 통해 일정 직류전압으로 정류되고, 이 직류전원은 중첩회로(12)에 인가된다. 또한 동기신호 발생기(13)에서 발생되어 출력되는 동기신호도 그 중첩회로(12)에 인가되고, 송화기(14)에서 출력되는 송화음성신호중 10kHz 이하의 신호만 로우패스필터(15)를 통한 후 반송파 발생기(18)로 부터 나오는 반송파에 실려 변조되고, 이 변조된 음성신호를 하이패스필터(17)를 통해 중첩회로(12)에 인가된다. 이와같이 중첩회로(12)에 인가되는 직류전원, 동기신호 및 음성신호는 중첩되어 전송선로(27)를 통해 자기(B)로 전송된다.First, the process of superimposing the power source, voice signal and synchronization signal in the mosquito A will be described. The AC power input from the power plug is stepped down through the transformer 10 and then through the rectifier 11. Rectified to a constant DC voltage, this DC power is applied to the superimposition circuit 12. In addition, the synchronization signal generated and output from the synchronization signal generator 13 is also applied to the superimposed circuit 12, and only the signals of 10 kHz or less among the transmitted voice signals output from the transmitter 14 are passed through the low pass filter 15 after the carrier wave. The modulated audio signal is carried on the carrier wave from the generator 18 and applied to the superimposed circuit 12 through the high pass filter 17. In this way, the DC power source, the synchronization signal, and the audio signal applied to the overlapping circuit 12 are superimposed and transmitted to the magnet B through the transmission line 27.

여기서, 전송신호(27)는 신호선(L6)과 접지선(L7)의 한 쌍으로 되어 있어, 그 전송선로(27)를 통해 전원, 영상신호, 음성신호를 동시에 중첩시켜 보내자면, 영상신호의 대역은 본래 4MHz정도 되는데 이 대역을 로우패스필터를 통해 3MHz정도로 해 주어도 소형화면에서 보는데는 지장이 없으므로 3MHz정도로 하여 그대로 전송하고, 음성도 20Hz∼16,000Hz정도 되는데, 송, 수화기를 통해서 들어야하므로 10KHz 정도의 이하 신호만 얻도록 로우패스필터를 거친 후 4MHz 반송파에 실어 보내면 된다.Here, the transmission signal 27 is a pair of the signal line L 6 and the ground line L 7 , so that the power signal, the video signal, and the audio signal can be superimposed at the same time through the transmission line 27. The band of is originally about 4MHz. Even if the band is set to about 3MHz through a low pass filter, it is not a problem to see on a small screen, so it is transmitted as it is about 3MHz. After passing through the low pass filter to get a signal of about 10KHz or less, it is sent on a 4MHz carrier.

즉, 제4도의 (a)의 도시된 바와 같은 영상신호대역, 제4도의 (b)에 도시된 바와 같은 음성신호대역 및 제4도의 (c)에 도시된 바와 같은 전원(주파수0)을 제4도의 (d)와 같이 주파수 분포를 갖도록 만들어 중첩시키면 한 쌍의 회선을 통해 음성신호, 영상신호 및 전원을 전송할 수 있게 된다.That is, the video signal band as shown in (a) of FIG. 4, the audio signal band as shown in (b) of FIG. 4 and the power source (frequency 0) as shown in (c) of FIG. As shown in (d) of FIG. 4, the frequency distribution can be superimposed so that audio signals, video signals, and power can be transmitted through a pair of lines.

따라서, 상기에서와 같이 중첩회로(12)에서 중첩된 음성신호, 동기신호 및 직류전원이 전송선로(27)를 통해 자기(B)로 전송된다.Therefore, as described above, the superimposed audio signal, the synchronization signal, and the DC power are transmitted to the magnet B through the transmission line 27.

자기(B)에서는 전송선로(27)를 통해 들어오는 동기신호 및 전원을 받아 로우패스필터(28)를 통해서는 전원을 분리하여 카메라(29)의 전원부(29a)에 인가하고, 동기분리기(30)를 통해서는 동기신호를 분리하여 카메라(29)의 동기신호부(29b)에 인가하여 카메라(29)를 구동시키고, 이때 카메라(29)는 방문자의 얼굴을 촬영하여 영상신호를 출력하는데, 그 영상신호는 로우패스필터(32)에서 3MHz 대역으로 된후 중첩회로(31)를 통해 전송선로(27)에 실리게 된다.In the magnetic B, the synchronous signal and power received through the transmission line 27 are received and the power is separated through the low pass filter 28 and applied to the power supply 29a of the camera 29, and the synchronous separator 30 Through the separation of the synchronization signal is applied to the synchronization signal unit 29b of the camera 29 to drive the camera 29, the camera 29 photographs the visitor's face and outputs a video signal, the image The signal becomes a 3MHz band in the low pass filter 32 and is then loaded on the transmission line 27 through the overlapping circuit 31.

한편, 방문자가 스위치(44)를 누르면 코드발생기(25)에서는 코드신호가 발생되고, 그 코드신호는 중첩회로(31)를 통해 전송선로(27)에 실리게 된다.On the other hand, when the visitor presses the switch 44, the code generator 25 generates a code signal, and the code signal is loaded on the transmission line 27 through the overlapping circuit 31.

또한, 방문자가 말하는 음성신호는 마이크(36)를 거쳐 로우패스필터(35)를 통한 후 변조기(34)에서 반송파 발생기(37)로 부터 출력되는 반송파에 실려 변조되고, 이 변조된 음성신호는 하이패스필터(33)를 거쳐 중첩회로(31)에 인가된다. 따라서 그 중첩회로(31)에 인가되는 영상신호, 음성신호 및 코드신호는 중첩되어 전송선호(27)를 통해 모기(A)로 전송된다.In addition, the voice signal spoken by the visitor is passed through the low pass filter 35 through the microphone 36 and then modulated on a carrier wave output from the carrier generator 37 by the modulator 34, and the modulated voice signal is high. It is applied to the overlapping circuit 31 via the pass filter 33. Therefore, the video signal, the audio signal and the code signal applied to the superimposed circuit 31 are superimposed and transmitted to the mosquito A through the transmission preference 27.

이와같이 자기(B)로 부터 전송선로(27)를 통해 모기(A)로 전송되는 신호들은 직류차단기(21)를 통해 직류성분은 차단되고 순수신호성분만이 출력되며, 이 직류차단기(21)에서 출력되는 신호중 코드신호가 디코더(43)에서 검출된 후 스위치 드라이버(42)를 거쳐 모니터(19)로 인가되어, 그 모니터(19)를 구동시키게 된다.In this way, the signals transmitted from the magnetism B to the mosquito A through the transmission line 27 are blocked through the DC circuit breaker 21, and only the pure signal components are output. In this DC circuit breaker 21, The code signal among the output signals is detected by the decoder 43 and then applied to the monitor 19 via the switch driver 42 to drive the monitor 19.

또한, 직류차단기(21)의 출력신호중 영상신호가 3MHz인 로우패스필터(20)를 통하게 되어 모니터(19)에 표시되므로 방문자 화상을 볼 수 있게 된다.In addition, since the video signal of the output signal of the DC circuit breaker 21 passes through the low pass filter 20 having a 3 MHz display on the monitor 19, the visitor image can be viewed.

또한, 상기 직류차단기(21)의 출력신호중 음성신호는 약 3.5MHz 이상만 통과시키는 하이패스필터(22)를 통한 후 복조기(23)에서 복조되고, 이 복조된 음성신호는 10KHz 이하만 통과하도록 하는 로우패스필터(24)를 통한 후 증폭기(25)에서 증폭되어 수화기(26)로 출력된다.In addition, the audio signal of the output signal of the DC circuit breaker 21 is demodulated by the demodulator 23 through the high pass filter 22 passing only about 3.5MHz or more, and the demodulated voice signal passes only 10KHz or less. After being passed through the low pass filter 24, it is amplified by the amplifier 25 and output to the receiver 26.

한편, 모기(A)로 부터 전송선로(27)를 통해 자기(B)로 전송되는 신호중 음성신호는 3.5MHz 이상만 통과하는 하이패스필터(38)를 통한 후 복조기(39)에서 복조되고, 이 복조된 음성신호는 10KHz 이하만 통과하는 로우패스필터(40)를 통하여 스피커(41)로 출력된다.Meanwhile, among the signals transmitted from the mosquito A to the magnet B through the transmission line 27, the voice signal is demodulated by the demodulator 39 after passing through the high pass filter 38 passing only 3.5 MHz or more. The demodulated voice signal is output to the speaker 41 through the low pass filter 40 which passes only 10 KHz or less.

이상에서 상세히 설명한 바와 같이 본 발명은 도어폰의 모기 및 자기 사이에서 한 쌍의 신호선만을 통해 모든 신호들을 중첩 전송할 수 있게 되므로, 그 설치작업이 간편해 질 뿐 아니라 제품의 가격이 저렴해지고, 제품의 신뢰성이 향상되는 효과가 있게 된다.As described in detail above, the present invention is capable of overlapping transmission of all signals through a pair of signal lines between the mosquito and the porcelain of the door phone, thereby simplifying the installation work and reducing the price of the product and reliability of the product. This has the effect of being improved.

Claims (1)

집안에 설치되는 모기(A) 및 대문에 설치되는 자기(B) 사이에 신호를 전송하는 도어폰의 신호 전송장치에 있어서, 상기 모기(A)는 교류전원을 정류하여 직류전원을 공급하는 전원부(51)와, 동기신호를 발생하는 동기신호 발생기(13)와, 송화기(14)의 출력음성신호를 변조하여 출력하는 음성변조부(52)와, 상기 전원부(51)의 직류전원, 상기 동기신호 발생기(13)의 동기신호 및 상기 음성변조부(52)의 변조된 음성신호를 중첩하여 상기 자기(B)측으로 출력하는 중첩회로(12)와, 상기 자기(B)측으로 부터 입력되는 신호에서 직류전원을 차단하는 직류차단기(21)와, 상기 직류차단기(21)의 출력신호에서 코드신호를 디코딩하여 모니터 구동신호를 출력하는 코드신호 처리부(53)와, 상기 코드신호 처리부(53)의 모니터 구동신호에 의해 구동되고, 상기 직류차단기(21)의 출력신호에서 영상신호를 분리해내어 모니터(19)에 표시하는 영상신호 처리부(54)와, 상기 직류차단기(21)의 출력신호에서 음성신호를 분리해낸 후 복조하여 스피커(26)로 출력하는 음성처리부(55)로 구성하고, 상기 자기(B)는 상기 모기(A)측으로 부터 입력되는 신호에서 상기 직류전원 및 동기신호를 각기 분리해내는 로우패스필터(28) 및 동기분리부(30)와, 상기 로우패스필터(28) 및 동기분리부(30)에서 출력되는 직류전원 및 동기신호에 의해 구동되어 영상신호를 출력하는 카메라(29)와, 스위치(44)의 상태에 따라 코드신호를 발생하는 코드신호 발생부(56)와, 상기 카메라(29)의 출력영상신호중 소정 주파수 이하의 신호만 통과시키는 로우패스필터(32)와, 마이크(36)의 출력음성신호를 변조하여 출력하는 음성변조부(57)와, 상기 코드신호 발생부(56)의 코드신호, 상기 로우패스필터(32)의 출력영상신호 및 상기 음성변조부(57)의 변조된 음성신호를 중첩하여 상기 모기(A)측으로 출력하는 중첩회로(31)와, 상기 모기(A)측으로 부터 입력되는 신호에서 음성신호를 분리해낸 후 복조하여 스피커(41)로 출력하는 음성처리부(58)로 구성하여, 상기 모기(A) 및 자기(B) 사이에서 신호선(L6) 및 접지선(L7)의 전송선로(27)를 통해 상기 신호들을 전송할 수 있게 구성된 것을 특징으로 하는 도어폰의 신호 전송장치.In the door phone signal transmission device for transmitting a signal between the mosquito (A) is installed in the house and the magnetic (B) installed in the door, the mosquito (A) is a power supply unit for rectifying the AC power supply to supply the DC power ( 51, a synchronous signal generator 13 for generating a synchronous signal, a voice modulator 52 for modulating and outputting an output voice signal of the talker 14, a DC power supply of the power supply 51, and the synchronous signal Superimposed circuit 12 for superimposing the synchronization signal of the generator 13 and the modulated voice signal of the voice modulator 52 and outputting it to the magnetic B side, and a direct current from the signal input from the magnetic B side. A DC circuit breaker 21 for disconnecting power, a code signal processor 53 for decoding a code signal from the output signal of the DC circuit breaker 21, and outputting a monitor driving signal; and a monitor drive of the code signal processor 53 Driven by a signal, the output of the DC circuit breaker 21 A video signal processor 54 for separating the video signal from the call and displaying the video signal on the monitor 19, and a voice processor for separating the demodulated signal from the output signal of the DC circuit breaker 21 and demodulating the signal. And a low pass filter 28 and a synchronous separator 30 for separating the DC power source and the synchronous signal from the signal input from the mosquito A side, respectively; The camera 29 is driven by the DC power and the synchronization signal output from the low pass filter 28 and the synchronization separator 30 to output an image signal, and generates a code signal according to the state of the switch 44. A code signal generator 56, a low pass filter 32 for passing only a signal below a predetermined frequency among the output video signals of the camera 29, and a voice modulator for modulating and outputting an output audio signal of the microphone 36. 57, the code signal of the code signal generator 56, and The superimposed circuit 31 for superimposing the output video signal of the low pass filter 32 and the modulated audio signal of the audio modulator 57 and outputting the superimposed circuit 31 to the mosquito A is input from the mosquito A. The voice signal is separated from the signal, and then demodulated and output to the speaker 41. The sound processor 58 includes a signal line L 6 and a ground line L 7 between the mosquito A and the magnet B. The signal transmission device of the door phone, characterized in that configured to transmit the signals through the transmission line (27).
KR1019890019911A 1989-12-28 1989-12-28 Signal transmitting device of door phone KR940000250B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019890019911A KR940000250B1 (en) 1989-12-28 1989-12-28 Signal transmitting device of door phone
DE4042088A DE4042088A1 (en) 1989-12-28 1990-12-28 SIGNAL TRANSMISSION SYSTEM FOR A DOOR TELEVIDEOPHONE
JP2416000A JPH04140953A (en) 1989-12-28 1990-12-28 Signal transmitter for door phone
GB9028152A GB2239581A (en) 1989-12-28 1990-12-28 Door phone transmits image, voice, sync and power down same line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890019911A KR940000250B1 (en) 1989-12-28 1989-12-28 Signal transmitting device of door phone

Publications (2)

Publication Number Publication Date
KR910013025A KR910013025A (en) 1991-08-08
KR940000250B1 true KR940000250B1 (en) 1994-01-12

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KR1019890019911A KR940000250B1 (en) 1989-12-28 1989-12-28 Signal transmitting device of door phone

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JP (1) JPH04140953A (en)
KR (1) KR940000250B1 (en)
DE (1) DE4042088A1 (en)
GB (1) GB2239581A (en)

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Also Published As

Publication number Publication date
GB2239581A (en) 1991-07-03
JPH04140953A (en) 1992-05-14
GB9028152D0 (en) 1991-02-13
DE4042088A1 (en) 1991-07-11
KR910013025A (en) 1991-08-08

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