KR950005046A - 2-wire video door phone device - Google Patents

2-wire video door phone device Download PDF

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Publication number
KR950005046A
KR950005046A KR1019930014458A KR930014458A KR950005046A KR 950005046 A KR950005046 A KR 950005046A KR 1019930014458 A KR1019930014458 A KR 1019930014458A KR 930014458 A KR930014458 A KR 930014458A KR 950005046 A KR950005046 A KR 950005046A
Authority
KR
South Korea
Prior art keywords
signal
door phone
transmission line
high frequency
voice signal
Prior art date
Application number
KR1019930014458A
Other languages
Korean (ko)
Other versions
KR0183639B1 (en
Inventor
서인석
Original Assignee
이대원
삼성항공산업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이대원, 삼성항공산업 주식회사 filed Critical 이대원
Priority to KR1019930014458A priority Critical patent/KR0183639B1/en
Publication of KR950005046A publication Critical patent/KR950005046A/en
Application granted granted Critical
Publication of KR0183639B1 publication Critical patent/KR0183639B1/en

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Classifications

    • 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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals

Abstract

본 발명은 2선식 비디오 도어폰장치에 관한 것으로 특히, 비디오 신호는 FM변조하고, 음성신호는 무변조하여 직류전원에 다중화시켜서 송수신하는 것을 특징으로 한다. 따라서, 본 발명은 회로구성이 간단하며 깨끗한 화질을 볼 수 있다.The present invention relates to a two-wire video door phone device. In particular, the video signal is FM-modulated, the audio signal is unmodulated, and multiplexed to a DC power source for transmission and reception. Therefore, the present invention is simple in circuit configuration and clear image quality can be seen.

Description

2선식 비디오 도어폰장치2-wire video door phone device

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

제1도 내지 제3도는 종래의 2선식 비디오 도어폰장치들을 나타낸 구성도, 제4도 내지 제6도는 종래의 2선식 비디오 도어폰 장치들의 영상 및 음성신호의 통신방식을 설명하기 위한 도면, 제7도는 본 발명에 의한 2선식 비디오 도어폰장치를 나타낸 구성도.1 to 3 are diagrams illustrating the conventional two-wire video door phone devices, and FIGS. 4 to 6 are views for explaining a communication method of video and audio signals of the conventional two-wire video door phone devices. 7 is a block diagram showing a two-wire video door phone device according to the present invention.

Claims (1)

아웃도어세트와 인도어세트를 2선의 전송선으로 접속하고 영상, 음성 및 전원을 다중화하여 전송하는 2선식 비디오 도어폰장치에 있어서, 비디오카메라를 통해 픽업된 영상신호를 FM변조하고 FM변조된 수 MHz대의 고주파신호를 고주파필터를 통해 상기 전송선에 결합하며, 마이크로폰을 통해 픽업된 음성신호를 증폭해서 음성분리수단을 통해 직류전원에 중첩하고, 음성신호가 중첩된 직류전원을 무극성수단 및 저주파 필터를 통해 상기 전송선에 결합하며, 상기 음성분리수단을 통해 분리된 음성신호를 증폭해서 스피커를 통해 음성출력하기 위한 아웃도어세트와, 상기 전송선과 결합된 고주파필터를 통해 수신된 고주파신호로부터 영상신호를 검출해서 CRT 스크린상에 표시하며, 상기 전송선과 결합된 저주파필터를 통해 직류전원에 중첩된 음성신호를 분리해서 증폭하여 스피커를 통해 음성출력하고, 마이크로폰을 통해 픽업된 음성신호를 증폭해서 직류전원에 중첩시켜 전송하는 인도어세트를 구비하는 것을 특징으로 하는 2선식 비디오 도어폰장치.A two-wire video door phone device in which an outdoor set and an indoor set are connected by a two-wire transmission line, and multiplexed transmission of video, audio, and power is provided. A high frequency signal is coupled to the transmission line through a high frequency filter, amplified voice signal picked up by a microphone is superimposed on a DC power source through a voice separating means, and the DC power with the voice signal superimposed on the non-polar means and a low frequency filter. An outdoor set for amplifying a voice signal separated by the voice separating means and outputting the voice signal through a speaker, and detecting a video signal from a high frequency signal received through a high frequency filter coupled to the transmission line to generate a CRT. Displayed on the screen, the voice signal superimposed on DC power through the low-frequency filter coupled to the transmission line Two-wire video door phone system separate by amplifying comprising the indoor set to the sound output through the speaker, and transmitted by amplifying the sound signal picked up through the microphone by superposing the direct-current power supply. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930014458A 1993-07-28 1993-07-28 Two line video doorphone apparatus KR0183639B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930014458A KR0183639B1 (en) 1993-07-28 1993-07-28 Two line video doorphone apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930014458A KR0183639B1 (en) 1993-07-28 1993-07-28 Two line video doorphone apparatus

Publications (2)

Publication Number Publication Date
KR950005046A true KR950005046A (en) 1995-02-18
KR0183639B1 KR0183639B1 (en) 1999-05-01

Family

ID=19360250

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930014458A KR0183639B1 (en) 1993-07-28 1993-07-28 Two line video doorphone apparatus

Country Status (1)

Country Link
KR (1) KR0183639B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100433656B1 (en) * 2002-05-31 2004-05-31 (주) 코콤 videophone
KR100477579B1 (en) * 2002-10-10 2005-03-18 서울통신기술 주식회사 Home automation for improving display-image

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100433656B1 (en) * 2002-05-31 2004-05-31 (주) 코콤 videophone
KR100477579B1 (en) * 2002-10-10 2005-03-18 서울통신기술 주식회사 Home automation for improving display-image

Also Published As

Publication number Publication date
KR0183639B1 (en) 1999-05-01

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