JPH03140075A - Television doorphone - Google Patents

Television doorphone

Info

Publication number
JPH03140075A
JPH03140075A JP27896289A JP27896289A JPH03140075A JP H03140075 A JPH03140075 A JP H03140075A JP 27896289 A JP27896289 A JP 27896289A JP 27896289 A JP27896289 A JP 27896289A JP H03140075 A JPH03140075 A JP H03140075A
Authority
JP
Japan
Prior art keywords
circuit
signal
modulation
function
transmission line
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP27896289A
Other languages
Japanese (ja)
Inventor
Wataru Matsumoto
渉 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP27896289A priority Critical patent/JPH03140075A/en
Publication of JPH03140075A publication Critical patent/JPH03140075A/en
Pending legal-status Critical Current

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  • Selective Calling Equipment (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

PURPOSE:To obtain an excellent television doorphone with simple constitution by controlling various functions provided to a slave set through the use of a 2 wire transmission line from a master set. CONSTITUTION:An FM modulation circuit 18 applying FM modulation to a DTMF signal from a DTMF signal transmission circuit 19 and sending the result to a slave set 101 as various function signals is provided to a master set 103 and the slave set 101 is provided with a function control circuit 22 receiving and demodulating the FM modulation signal and controlling each function according to the content of the function signal. Thus, the 2-wire transmission line 102 is used as it is without extending a cable for special control to control plural functions of the slave set 101 from the master set 103. Thus, the television doorphone having multi-function is obtained inexpensively with simple constitution.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明はテレビカメラのレンズを有する子機と表示器
を有する親機とを2線伝送路を介して接続したテレビド
アホンに関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a television door phone in which a slave unit having a television camera lens and a base unit having a display are connected via a two-wire transmission line.

〔従来の技術〕[Conventional technology]

第2図は従来のテレビドアホンの構成を示すブロック図
であり、図において、子機(101)は2線伝送路(1
02)を介して親機(103)に接続されている。
Fig. 2 is a block diagram showing the configuration of a conventional video door intercom.
02) to the base unit (103).

上記子機(101)はテレビカメラのレンズは(1)を
通して撮影された被写体を映像信号に変換する撮像回路
(2)と、この撮像回路(2)から出力された映像信号
を処理するカメラ信号処理回路(3)と、このカメラ信
号処理回路(3)の出力信号及びスピーカ(4)、マイ
クロホン(5)、呼出しボタン(6)の各出力信号を変
調して2線伝送路(102)に出力するとともに該2線
伝送路からの人力信号を復調する変復調回路(7)と、
上記の各回路に定電圧を供給する電源回路(8)とで構
成される。
The handset (101) has an imaging circuit (2) that converts the subject photographed through the TV camera lens (1) into a video signal, and a camera signal that processes the video signal output from the imaging circuit (2). A processing circuit (3) modulates the output signals of this camera signal processing circuit (3) and output signals of a speaker (4), a microphone (5), and a call button (6) and sends them to a two-wire transmission line (102). a modulation/demodulation circuit (7) that outputs and demodulates the human input signal from the two-wire transmission line;
It is composed of a power supply circuit (8) that supplies a constant voltage to each of the above-mentioned circuits.

また、上記親機(103)は2線伝送路(102)に接
続されたビデオインターフェース回路(9)、変復調回
路(12)、電源回路(13)と、上記ビデオインター
フェース回路(9)の出力信号を表示するCRT(15
)と、このビデオインターフェース回路(9)、操作ス
イッチ回路(10)、変復調回路(12)が接続された
制御回路(11)と、上記変復調回路(12)に接続さ
れた送受話器(16)とで構成されており、上記電源回
路(13)にはACアダプタ(14)が接続されている
The base unit (103) also includes a video interface circuit (9), a modulation/demodulation circuit (12), a power supply circuit (13), and an output signal of the video interface circuit (9) connected to the two-wire transmission line (102). CRT (15
), a control circuit (11) to which the video interface circuit (9), the operation switch circuit (10), and the modulation/demodulation circuit (12) are connected, and a handset (16) connected to the modulation/demodulation circuit (12). An AC adapter (14) is connected to the power supply circuit (13).

次に動作について説明する。来訪者が子機(101)の
呼出しボタン(6)を押すと、その呼出しボタン信号が
2線伝送路(102)を通って親機(103)の制御回
路(11)に伝えられる。
Next, the operation will be explained. When a visitor presses the call button (6) of the slave unit (101), the call button signal is transmitted to the control circuit (11) of the base unit (103) through the two-wire transmission path (102).

子機(101)から信号の伝送を受けた制御回路(11
)は変復調回路(12)を制御し、電源回路(13)か
ら子機(101)の電源回路(8)に2線伝送路(10
2)を介して電源を供給する。
The control circuit (11) receives the signal from the handset (101).
) controls the modulation/demodulation circuit (12) and connects the two-wire transmission line (10) from the power supply circuit (13) to the power supply circuit (8) of the handset (101).
2) Supply power via.

その電源供給を受けた子機(101)は電源回路(8)
によって回路内に必要な定電圧源を作り出すことにより
、子機(101)の各回路に電源が供給され、テレビカ
メラ系と音声系が動作するようになる。
The handset (101) that received the power supply is connected to the power supply circuit (8)
By creating a necessary constant voltage source in the circuit, power is supplied to each circuit of the handset (101), and the television camera system and audio system come to operate.

テレビカメラのレンズ(1)を通って撮像回路(2)内
にある固体撮像素子上に投影された被写体は、その撮像
回路(2)によって映像信号に変換され、その映像信号
をCRT(15)上に適切に表示されるように、カメラ
信号処理回路(3)にて諸々の信号処理を施して、2線
伝送路(102)上に出力される。その映像信号が親機
(103)のビデオインターフェース回路(9)によっ
て2線伝送路(102)上から抽出され、その抽出され
た映像信号による映像がCRT(15)上に表示される
The object projected onto the solid-state image sensor in the imaging circuit (2) through the lens (1) of the television camera is converted into a video signal by the imaging circuit (2), and the video signal is sent to the CRT (15). The camera signal processing circuit (3) performs various signal processing so that the signal is appropriately displayed above, and is output onto the two-wire transmission line (102). The video signal is extracted from the two-wire transmission line (102) by the video interface circuit (9) of the base unit (103), and the video based on the extracted video signal is displayed on the CRT (15).

また、子機(101)のマイクロホン(5)で捕えられ
た音声は、変復調回路(4)によって変調され、2線伝
送路(102)を通って親機(103)に出力される。
Furthermore, the voice captured by the microphone (5) of the handset (101) is modulated by the modulation/demodulation circuit (4) and output to the base device (103) through the two-wire transmission line (102).

親機(103)側は、その音声信号を変復調回路(12
)によって復調し、送受話器(16)のスピーカから音
声を再生する。
The base unit (103) side transmits the audio signal to the modulation/demodulation circuit (12).
), and the audio is reproduced from the speaker of the handset (16).

また、親機(103)の送受話器(16)のマイクロホ
ンで捕らえられた音声は、子機(101)から親機(1
03)へ音声信号を送った際のキャリア周波数とは異な
るキャリア周波数に変復調回路(12)で変調され、2
線伝送路(102)を通って子機(101)に出力され
る。
In addition, the voice captured by the microphone of the handset (16) of the base unit (103) is transmitted from the handset (101) to the base unit (103).
The modulation/demodulation circuit (12) modulates the audio signal to a carrier frequency different from the carrier frequency used when sending the audio signal to 03).
The signal is output to the slave unit (101) through the line transmission line (102).

子機(101)側は、その音声信号を変復調回路(2)
によって復調し、スピーカ(6)から音声を出力する。
The handset (101) side transmits the audio signal to the modulation/demodulation circuit (2).
demodulates the signal and outputs audio from the speaker (6).

親機(103)の操作スイッチ回路(10)は子機(1
01)を複数台接続した時の切換スイッチ等に使用する
The operation switch circuit (10) of the master unit (103) is connected to the slave unit (103).
01) is used as a changeover switch when multiple units are connected.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来のテレビドアホンは以上のように構成されているの
で、子機側に様々な機能を持たせ、それを親機側からコ
ントロールする場合、コントロール用のケーブルを増や
さなければならず、構成が複雑かつ高価になるなどの問
題点があった。
Conventional video door intercoms are configured as described above, so if you want to have various functions on the slave unit and control them from the base unit, you have to increase the number of control cables, making the configuration complicated. It also had problems such as being expensive.

この発明は上記のような問題点を解消することを課題に
なされたもので、親機側から、2線伝送路を利用して、
子機側に設けた様々な機能をコントロールできるように
した構成の簡単な優れたテレビドアホンを得ることを目
的とする。
This invention was made with the aim of solving the above-mentioned problems, and uses a two-wire transmission line from the base unit side.
To obtain an excellent video door intercom with a simple configuration capable of controlling various functions provided on a handset side.

〔課題を解決するための手段〕[Means to solve the problem]

この発明に係るテレビカメラドアホンは、親機側にDT
MF信号送出回路からのDTMF信号をFM変調して子
機側に種々の機能信号として送出するFM変調回路を設
け、子機側にはそのFM変調信号を受信して復調し、機
能信号内容に従って各機能を制御する機能制御回路を具
備したものである。
The television camera door phone according to this invention has a DT on the main unit side.
An FM modulation circuit is provided that modulates the DTMF signal from the MF signal transmission circuit and sends it to the handset as various functional signals. It is equipped with a function control circuit that controls each function.

〔作用〕[Effect]

この発明におけるテレビドアホンは、特別なコントロー
ル用のケーブルを増設することなく、2線伝送路をその
まま利用して、親機から子機の複数の機能をコントロー
ルできるようにしたことにより、多機能を有するテレビ
ドアホンを簡単な構成で安値に得ることを可能とする。
The video door intercom of this invention has multiple functions by allowing the main unit to control multiple functions of the handset by using the two-wire transmission line as is, without adding any special control cables. To obtain a video door intercom with a simple configuration and at a low price.

〔実施例〕〔Example〕

以下、この発明の一実施例を図について説明する。第1
図において、子機(101)はテレビカメラのレンズ(
1)を通して撮影された被写体を映像信号に変換する撮
像回路(2)と、この撮像回路(2)から出力された映
像信号を処理するカメラ信号処理回路(3)と、このカ
メラ信号処理回路(3)の出力信号及びスピーカ(4)
、マイクロホン(5)、呼出しボタン(6)の各出力信
号を変調して2線伝送路(102)に出力するとともに
該2線伝送路からの入力信号を復調する変復調回路(7
)と、上記の各回路に定電圧を供給する電源回路(8)
と、2線伝送路(102)に接続されたFM復調回路(
20)と、このFM復調回路(20)の出力側に接続さ
れたDTMF信号(押しボタンダイヤル信号)受信回路
(21)と、上記撮像回路(2)、変復調回路(7) 
、DTMF信号受信回路(21)に接続された機能制御
回路(22)とで構成されている。
An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, the handset (101) is a television camera lens (
1), an imaging circuit (2) that converts the photographed subject into a video signal, a camera signal processing circuit (3) that processes the video signal output from this imaging circuit (2), and a camera signal processing circuit (3) that processes the video signal output from this imaging circuit (2). 3) Output signal and speaker (4)
, microphone (5), and call button (6) and outputs the modulated signals to the two-wire transmission line (102), as well as demodulating the input signal from the two-wire transmission line (102).
) and a power supply circuit (8) that supplies constant voltage to each of the above circuits.
and an FM demodulation circuit (
20), a DTMF signal (push button dial signal) receiving circuit (21) connected to the output side of this FM demodulation circuit (20), the above imaging circuit (2), and a modulation/demodulation circuit (7).
, and a function control circuit (22) connected to a DTMF signal receiving circuit (21).

また、上記親機(103)は2線伝送路(102)に接
続されたビデオインターフェース回路(9)、変復調回
路(12)、電源回路(13)と、上記ビデオインター
フェース回路(9)の出力信号を表示するCRT(15
)と、このビデオインターフェース回路(9)、ti作
スイッチ回路(1,0)、変復調回路(12)が接続さ
れた制御回路(11)と、上記変復調回路(12)に接
続された送受話器(16)と、2線伝送路(102)に
接続されたFM変調回路(18)と、このFM変調回路
(18)と制御回路(11)とに接続されたDTMF信
号送出口路(19)とで構成されており、上記電源回路
(13)にはACアダプタ(14)が接続されている。
The base unit (103) also includes a video interface circuit (9), a modulation/demodulation circuit (12), a power supply circuit (13), and an output signal of the video interface circuit (9) connected to the two-wire transmission line (102). CRT (15
), a control circuit (11) to which the video interface circuit (9), the TI switch circuit (1, 0), and the modulation/demodulation circuit (12) are connected, and a handset (12) connected to the modulation/demodulation circuit (12). 16), an FM modulation circuit (18) connected to the two-wire transmission path (102), and a DTMF signal output path (19) connected to the FM modulation circuit (18) and the control circuit (11). An AC adapter (14) is connected to the power supply circuit (13).

次に動作について説明する。親機(103)のCRT(
15)上に表示された映像を見ながら、操作スイッチ回
路(10)上に設けた子機機能(例えば、カメラの絞り
や角度調節等)の調整用スイッチ(図示せず)を押し、
その機能信号をもとに制御回路(11)からDTMF信
号送出回路(19)に制御信号を送る。
Next, the operation will be explained. The CRT of the main unit (103) (
15) While watching the image displayed above, press the adjustment switch (not shown) for the handset functions (for example, camera aperture and angle adjustment, etc.) provided on the operation switch circuit (10),
Based on the function signal, a control signal is sent from the control circuit (11) to the DTMF signal sending circuit (19).

DTMF信号送出回路(19)はその制御信号にあった
DTMF信号をFM変調回路(18)に送る。FM変調
回路(18)では送られてきたDTMF信号を、音声用
キャリア周波数及び映像信号周波数以外の周波数帯のキ
ャリア周波数に乗せて子機(101)側に送出する。
The DTMF signal sending circuit (19) sends the DTMF signal matching the control signal to the FM modulation circuit (18). The FM modulation circuit (18) transmits the received DTMF signal to the handset (101) side on a carrier frequency in a frequency band other than the audio carrier frequency and the video signal frequency.

子機(101)のFM復調回路(20)は、2線伝送路
(102)を介して親機(103)から伝送された披麦
調DTMF信号をm調し、DTMF信号受信回路(21
)に送る。このDTMF信号受信回路(21)でエンコ
ードされた信号は機能制御回路(22)で解読し、その
制御内容に従って各機能(例えば、カメラの絞りや角度
調節等)をコントロールする。
The FM demodulation circuit (20) of the slave unit (101) modulates the DTMF signal transmitted from the base unit (103) via the two-wire transmission line (102) to m-tone and sends it to the DTMF signal receiving circuit (21).
). The signal encoded by the DTMF signal receiving circuit (21) is decoded by the function control circuit (22), and each function (for example, camera aperture, angle adjustment, etc.) is controlled according to the control content.

なお、上記実施例ではテレビドアホンに関して示したが
、電源と映像信号を重畳化した監視用カメラの制御に用
いてもよく、上記実施例と同様の効果を奏する。
Although the embodiment described above is related to a video door intercom, it may also be used to control a surveillance camera in which a power source and a video signal are superimposed, and the same effects as in the embodiment described above can be obtained.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、2線伝送路によって
接続した子機の各機能を、親機からその2線伝送路を利
用してコントロールできるように構成したので、子機の
機能に応じた特別の伝送路増設工事をする必要がなく、
簡単かつ安価な構成で、親機は子機を遠隔操作できると
いう効果がある。
As described above, according to the present invention, each function of the handset connected via a two-wire transmission line is configured such that the main unit can control each function using the two-wire transmission line. There is no need for special transmission line expansion work,
It has a simple and inexpensive configuration, and has the effect of allowing the parent device to remotely control the child device.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例によるテレビドアホンの構
成を示すブロック図、第2図は従来のテレビドアホンの
構成を示すブロック図である。 図において、(101)は子機、(102)は2線伝送
路、(103)は親機、(15)はCRT(表示器)、
(18)はFM変調回路、(19)はDTM信号送出回
路、(20)はFM復調回路、(21)はDTMF信号
受信回路、(22)は機能制御回路である。 なお、図中、同一符号は同一または相当部分を示す。
FIG. 1 is a block diagram showing the configuration of a video door phone according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional video door phone. In the figure, (101) is a slave unit, (102) is a 2-wire transmission line, (103) is a master unit, (15) is a CRT (display unit),
(18) is an FM modulation circuit, (19) is a DTM signal transmission circuit, (20) is an FM demodulation circuit, (21) is a DTMF signal reception circuit, and (22) is a function control circuit. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】 テレビカメラのレンズを有する子機と表示器を有する親
機とを2線伝送路を介して接続したテレビドアホンにお
いて、 DTMF信号送出回路からのDTMF信号をFM変調し
て前記子機に種々の機能信号として送出するFM変調回
路を前記親機に設け、 前記FM変調信号を受信して復調し前記機能信号の内容
に従って各機能を制御する機能制御回路を前記子機に設
けたことを特徴とするテレビドアホン。
[Claims] In a video intercom in which a handset having a TV camera lens and a base unit having a display are connected via a two-wire transmission line, the DTMF signal from the DTMF signal transmission circuit is FM-modulated and the The base unit is provided with an FM modulation circuit that sends out various function signals to the slave unit, and the slave unit is provided with a function control circuit that receives and demodulates the FM modulation signal and controls each function according to the content of the function signal. A video door phone that features:
JP27896289A 1989-10-26 1989-10-26 Television doorphone Pending JPH03140075A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27896289A JPH03140075A (en) 1989-10-26 1989-10-26 Television doorphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27896289A JPH03140075A (en) 1989-10-26 1989-10-26 Television doorphone

Publications (1)

Publication Number Publication Date
JPH03140075A true JPH03140075A (en) 1991-06-14

Family

ID=17604493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27896289A Pending JPH03140075A (en) 1989-10-26 1989-10-26 Television doorphone

Country Status (1)

Country Link
JP (1) JPH03140075A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0485892U (en) * 1990-11-28 1992-07-27

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01129686A (en) * 1987-11-16 1989-05-22 Erubetsukusu Video Kk Closed circuit television device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01129686A (en) * 1987-11-16 1989-05-22 Erubetsukusu Video Kk Closed circuit television device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0485892U (en) * 1990-11-28 1992-07-27

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