JPH01216684A - Video signal transmission system for interphone equipment with monitor - Google Patents

Video signal transmission system for interphone equipment with monitor

Info

Publication number
JPH01216684A
JPH01216684A JP4098188A JP4098188A JPH01216684A JP H01216684 A JPH01216684 A JP H01216684A JP 4098188 A JP4098188 A JP 4098188A JP 4098188 A JP4098188 A JP 4098188A JP H01216684 A JPH01216684 A JP H01216684A
Authority
JP
Japan
Prior art keywords
monitor
signal
video signal
monitor video
intercom
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
JP4098188A
Other languages
Japanese (ja)
Inventor
Yoshiaki Ueno
植野 嘉章
Keiichi Mizuguchi
水口 慶一
Yoshihiro Tanigawa
嘉浩 谷川
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP4098188A priority Critical patent/JPH01216684A/en
Publication of JPH01216684A publication Critical patent/JPH01216684A/en
Pending legal-status Critical Current

Links

Landscapes

  • Burglar Alarm Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

PURPOSE:To obtain a monitor video image with high quality without disturbing horizontal synchronization of the monitor video image even if a sag by a DC power supply separation means takes place by sending a high frequency burst signal at a higher frequency than the frequency band of the monitor video signal in place of a horizontal synchronizing signal of the monitor video signal so as to take the horizontal synchronization. CONSTITUTION:A high frequency burst signal VH' at higher band than the frequency band of the monitor video signal VP is sent from a video signal transmission section of an interphone slave set 1 in place of the horizontal synchronizing signal VH of the monitor video signal VP. Then the horizontal synchronizing signal VH'' is generated based on the high frequency burst signal VH' by the video signal reception section of the interphone master set 3 to display the monitor video image by the monitor video signal VP onto a monitor television set 4. Thus, even when the monitor video signal VP causing sag by the DC power supply separation means is received, the horizontal synchronizing signal VH'' generated based on the high frequency burst signal VH' is immune to the effect of sag. Thus, the horizontal synchronization of the monitor video image displayed on the monitor television set 4 is not disturbed.

Description

【発明の詳細な説明】 [産業上の利用分野1 本発明は、モニタ映像を見ながら来客と応対できるよう
にしたモニタ付きインターホン装置の映像信号伝送方式
に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a video signal transmission system for an intercom device with a monitor that allows customers to be contacted while viewing a monitor image.

【従来の技術] 一般に、モニタ映像を見ながら来客と応対できるように
したこの種のモニタ付きインターホン装置は、第4図に
示すように、門柱に設置されるインターホン子器1gA
にモニタカメラ2を設けるとともに、住宅内に設置され
るインターホン親器3側にモニタテレビ4を設け、イン
ターホン子器1側とインターホン親器3側とを、映像信
号伝送用の同軸ケーブル5aと、通話音声信号伝送、電
源伝送、制御信号伝送を行う4芯の電IQ 5 bとで
接続し、通話音声信号、モニタ映像信号、および直流電
源を伝送するようになっている。なお、図示例では、イ
ンターホン子器1と、モニタカメラ2を一体化してカメ
ラ付きドアホンXとし、インターホン親63と、モニタ
テレビ4と、セキュリティ装置などを一体化して住宅情
報fiYとしている。
[Prior Art] In general, this type of intercom device with a monitor that allows customers to interact with visitors while viewing a monitor image is a 1gA intercom device installed on a gatepost, as shown in Fig. 4.
A monitor camera 2 is provided at the , a monitor television 4 is provided on the side of the interphone main unit 3 installed in the house, and a coaxial cable 5a for video signal transmission is connected between the intercom sub unit 1 side and the interphone main unit 3 side. It is connected to a four-core electric wire IQ 5b that transmits call voice signals, power supply, and control signals, and transmits call voice signals, monitor video signals, and DC power. In the illustrated example, the intercom slave 1 and the monitor camera 2 are integrated to form a camera-equipped door phone X, and the intercom main unit 63, monitor television 4, security device, etc. are integrated to form the housing information fiY.

図中SPはスピーカ、MCはマイクロフォン、Tはオー
ディオトランス、LDはa器3gAの非常押釦SWが押
されたことを表示する非常通報ランプである。
In the figure, SP is a speaker, MC is a microphone, T is an audio transformer, and LD is an emergency notification lamp that indicates that the emergency push button SW of unit a 3gA has been pressed.

一方、配線作業を容易に行えるようにするため、第5図
に示すように、インターホン子離INと、インターホン
親i!S3側とをペア線よりなる信号線5のみで接続し
、この信号85を介して通話音声信号、モニタ映像信号
および直流電源を多重伝送するようにしたものが提案さ
れている。第6図は、ペア線を介して伝送される多重伝
送信号の構成例であり、インターホン親離3i111か
らインターホン子離1側に伝送される直流電源DCに、
ベースバンド信号よりなるモニタ映像信号Vpと、上り
、下りの通話音声信号V i、、V i2と、制御ff
i号Veとを重畳して周波数多重伝送するようにしてい
る。
On the other hand, in order to facilitate the wiring work, as shown in FIG. 5, the intercom remote IN and the intercom main i! It has been proposed that the S3 side is connected only by a signal line 5 consisting of a pair of wires, and a call audio signal, a monitor video signal, and a DC power source are multiplexed and transmitted via this signal 85. FIG. 6 is a configuration example of a multiplex transmission signal transmitted via a pair of wires.
A monitor video signal Vp consisting of a baseband signal, uplink and downlink voice signals V i, , V i2, and control ff
The i and Ve signals are superimposed and frequency multiplexed for transmission.

多重伝送回路は第5図に示すように構成され、インター
ホン子離1側の映像信号送信部は、差動増幅器を用いた
平衡化送信回路10と、一対のチロ−クコイルL1より
なる?rL源重畳回路11とで形成されており、インタ
ーホン親離3flllの映像信号受信部は、一対のチョ
ークコイルL2よりなる電源分離回路12と、差動増幅
器を用いた平衡化受信回路13とで形成されており、信
号#15としてはツイストペアMが用いられている。
The multiplex transmission circuit is configured as shown in FIG. 5, and the video signal transmission section on the side of the intercom unit 1 is composed of a balanced transmission circuit 10 using a differential amplifier and a pair of chiroke coils L1. The video signal receiving section of the intercom 3flll is formed by a power supply separation circuit 12 consisting of a pair of choke coils L2, and a balancing receiving circuit 13 using a differential amplifier. The twisted pair M is used as the signal #15.

[発明が解決しようとする課題1 しかしながら、第4図従従来にあっては、映像信号伝送
用の同軸ケーブルを必要とするので、既設のインターホ
ン用の信号線(2芯線あるいは4芯線)を利用すること
ができず、配線作業が面倒であるという問題があった。
[Problem to be solved by the invention 1 However, in the conventional method shown in Figure 4, a coaxial cable for video signal transmission is required, so the existing intercom signal line (2-core wire or 4-core wire) is used. However, there was a problem in that the wiring work was troublesome.

!lた、通話音声信号V i、、V i2を伝送するた
めのペア線を映像信号伝送用の信号線5として用い、信
号[5を介して直流電源DCを伝送している第5図従来
例にあっては、直流電源分離手段を設けたことにより水
平同期信号vllにサグが発生してモニタ映像の水平同
期が乱れるという問題があった。第7図は垂直同期区間
Tvにおけるサグ発生例、第8図は水平同期区間Tll
におけるサグ発生例を示すもので、第9図はサグによる
モニタ映像画面の乱れを示している。
! In addition, the pair of wires for transmitting the telephone voice signals Vi, Vi2 is used as the signal line 5 for transmitting the video signal, and the DC power supply DC is transmitted via the signal [5]. In this case, there was a problem that a sag occurred in the horizontal synchronizing signal vll due to the provision of the DC power source separation means, and the horizontal synchronization of the monitor image was disturbed. Figure 7 shows an example of sag occurrence in the vertical synchronization interval Tv, and Figure 8 shows an example of the occurrence of a sag in the horizontal synchronization interval Tll.
FIG. 9 shows an example of the occurrence of a sag, and FIG. 9 shows the disturbance of the monitor video screen due to the sag.

本発明は上記の点に鑑みで為されたものであり、その目
的とするところは、直流電源分離手段を設けたことによ
りサグが発生した場合にあっても、モニタ映像の水平同
期が乱れることがないモニタ付きインターホン装置の映
像信号伝送方式を提供することにある。
The present invention has been made in view of the above points, and its purpose is to prevent the horizontal synchronization of monitor images from being disrupted even if a sag occurs due to the provision of a DC power supply separation means. It is an object of the present invention to provide a video signal transmission system for an intercom device with a monitor that does not require a monitor.

[1題を解決するための手段] 本発明のモニタ付きインターホン装置の映像イδ号伝送
方式は、インターホン子器側にモニタカメラを設けると
ともに、インターホン親器側にモニタテレビを設け、イ
ンターホン子離とインターホン親離とをペア′線よりな
る13号線で接続し、該信号線を介して通話音声信号、
モニタ映像信号および直流電源を伝送するようにしたモ
ニタ付きインターホン*iにおいて、モニタカメラから
出力されるモニタ映像信号を信号線を介してベースバン
ド伝送するとともに、モニタ映像信号の水平同期信号に
代えでモニタ映像18号の周波数帯域よりも高域の高周
波バースト信号をインターホン子離の映像信号送信部よ
り伝送し、インターホン親離の映像信号受信部で高周波
バースト信号に基111で水平同期信号を生成してモニ
タ映像信号によるモニタ映像をモニタテレビに表示させ
るようにしたものである。
[Means for Solving Problem 1] The video signal δ transmission method of the intercom device with a monitor of the present invention is to provide a monitor camera on the intercom slave side, a monitor TV on the interphone master side, and separate the intercom device from the intercom device. and the intercom terminal are connected by line 13 consisting of a pair of wires, and the call voice signal,
In a monitor intercom *i that transmits a monitor video signal and a DC power supply, the monitor video signal output from the monitor camera is transmitted via the signal line in baseband, and the monitor video signal is transmitted in place of the horizontal synchronization signal of the monitor video signal. A high-frequency burst signal in a frequency band higher than the frequency band of monitor video No. 18 is transmitted from the video signal transmitting section of the intercom remote, and a horizontal synchronization signal is generated at 111 based on the high frequency burst signal in the video signal receiving section of the intercom remote. A monitor image based on a monitor image signal is displayed on a monitor television.

[作 用1 本発明は上述のように構成されており、モニタカメラか
ら出力されるモニタ映像信号を直流電源に重畳してペア
線よりなる信号線を介してベースバンド伝送する場合に
おいて、モニタ映像信号の水平同期信号に代えてモニタ
映像信号の周波数帯域よりも高域の高周波バースト信号
を伝送して、水平同期をとるようにしているので、直流
電源分離手段によるサグが発生した場合にあっても、モ
ニタ映像の水平同期が乱れることがなく、高品質のモニ
タ映像が得ら紅るようになって〜する。
[Function 1] The present invention is configured as described above, and when a monitor video signal output from a monitor camera is superimposed on a DC power source and transmitted in baseband via a signal line consisting of a pair of wires, the monitor video signal is Instead of the horizontal synchronization signal of the signal, a high frequency burst signal with a frequency band higher than the frequency band of the monitor video signal is transmitted to achieve horizontal synchronization. Also, the horizontal synchronization of the monitor image is not disturbed, and high quality monitor images can be obtained.

[実施例J 第1図乃至第3図は本発明方式一実施例を示すもので、
通話音声信号V i 1 g V i 2、直流電源D
Cなどを伝送するペアMよりなる信号Ia5を介してモ
ニタ映像信号Vpをベースバンド伝送するようにした第
5図従来例と同様のモニタ付きインターホン!装置にお
いて、モニタ映像信号Vpの水平同期信号Vllに代え
てモニタ映像信号Vpの周波−敗帯域よりも高域の高周
波バースト信号Vll’をインターホン子離1の映像信
号受信部より伝送し、インターホン親離3の映像信号受
信部で高周波バースト信号Vll’に基いて水平同期信
号VH″を生成してモニタ映像信号Vpによるモニタ映
像をモニタテレビ4に表示させるようにしたものである
0図中Vpcはカラーパースト信号である。
[Embodiment J Figures 1 to 3 show an embodiment of the method of the present invention,
Call voice signal V i 1 g V i 2, DC power supply D
FIG. 5 An intercom with a monitor similar to the conventional example, in which a monitor video signal Vp is transmitted in baseband via a signal Ia5 consisting of a pair M that transmits C, etc. In the device, instead of the horizontal synchronization signal Vll of the monitor video signal Vp, a high frequency burst signal Vll' having a frequency higher than the frequency band of the monitor video signal Vp is transmitted from the video signal receiving section of the intercom remote 1, and The video signal receiving section of the remote controller 3 generates a horizontal synchronizing signal VH'' based on the high frequency burst signal Vll' to display a monitor image based on the monitor image signal Vp on the monitor television 4. In the figure, Vpc is This is a color burst signal.

第2図(a)はサグが発生していない状態のモニタ映像
信号V9s第2図(b)はサグが発生している状態のモ
ニタ映像信号Vpを示すものであり、第3図(a)は映
像信号受信部において水平同期区間の信号が除去(同期
分離)されたモニタ映像信号■p゛、第3図(b)は分
離された高周波バースト信号Vll’、第3図(e)は
高周波バースト信号Vl+’に基いて生成された水平開
MM号V11″′が付加されたモニタ映像fFt号vp
”を示すものである。
FIG. 2(a) shows the monitor video signal V9 with no sag, FIG. 2(b) shows the monitor video signal Vp with sag, and FIG. 3(a) shows the monitor video signal V9 with no sag. 3(b) is the separated high frequency burst signal Vll', and FIG. 3(e) is the high frequency signal. Monitor video fFt number vp to which horizontal open MM number V11″′ generated based on burst signal Vl+′ is added
”.

いま、第2111i?I(b)に示すように、直流電源
分離手段によるサグが発生しているモニタ映像信号Vp
が受信されている場合にあっても、水平同期信号Vll
に対応して伝送される高周波バースト信号Vl+’は、
十号高い周波数であるので、信号線5を介して送られる
直流電源DCを分離する直流電源分離手段の影響を殆ど
受けない、したがって、この高周波バースト信号v)1
゛に基いて生成される水平同期信号v1−はサグの影響
を全く受けておらず、モニタテレビ4に表示されるモニ
タ映像の水平同期が乱れることがない。
2111i now? As shown in I(b), the monitor video signal Vp has a sag caused by the DC power separation means.
Even if the horizontal synchronization signal Vll is being received,
The high frequency burst signal Vl+' transmitted corresponding to
Since the frequency is 10 times higher, it is hardly affected by the DC power separation means that separates the DC power supply DC sent via the signal line 5. Therefore, this high frequency burst signal v)1
The horizontal synchronization signal v1- generated based on the above is not affected by sag at all, and the horizontal synchronization of the monitor video displayed on the monitor television 4 is not disturbed.

【発明の効果1 本発明は上述のように構成されており、モニタカメラか
ら出力されるモニタ映像信号を直流電源に重畳してペア
#iよりなる信号線を介してベースバンド伝送する場合
において、モニタ映像信号の水平同期信号に代えてモニ
タ映像信号の周波数帯域よりも高域の高周波バースト信
号を伝送して、水平同期をとるようにしているので、直
流電源分離手段によるサグが発生した場合にあっても、
モニタ映像の水平同期が乱れることがなく、高品質のモ
ニタ映像が得られるようになっている。
Effect 1 of the Invention The present invention is configured as described above, and when a monitor video signal output from a monitor camera is superimposed on a DC power supply and transmitted in baseband via a signal line consisting of pair #i, Instead of the horizontal synchronization signal of the monitor video signal, a high frequency burst signal with a frequency band higher than the frequency band of the monitor video signal is transmitted to achieve horizontal synchronization, so if a sag occurs due to the DC power separation means, Even so,
The horizontal synchronization of the monitor image is not disrupted, and high-quality monitor images can be obtained.

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

第1図乃至第3図は本発明方式の一実施例の動作説明図
、第4図は従来例の概略構成図、第5図は他の実施例の
要部回路図、第6図乃至第9図は同上の動作説明図であ
る。 1はインターホン子離、2はモニタカメラ、3はインタ
ーホン親離、4はモニタテレビ、5は信号線である。 代理人 弁理士 石 Iff  艮 七か:b −W           N−〇 第7図 第8図 第9図
1 to 3 are operation explanatory diagrams of one embodiment of the method of the present invention, FIG. 4 is a schematic configuration diagram of a conventional example, FIG. 5 is a main circuit diagram of another embodiment, and FIGS. FIG. 9 is an explanatory diagram of the same operation. 1 is an intercom remote, 2 is a monitor camera, 3 is an intercom base, 4 is a monitor television, and 5 is a signal line. Agent Patent Attorney Iff Ai Shichika:b -W N-〇Figure 7Figure 8Figure 9

Claims (1)

【特許請求の範囲】[Claims] (1)インターホン子器側にモニタカメラを設けるとと
もに、インターホン親器側にモニタテレビを設け、イン
ターホン子器とインターホン親器とをペア線よりなる信
号線で接続し、該信号線を介して通話音声信号、モニタ
映像信号および直流電源を伝送するようにしたモニタ付
きインターホン装置において、モニタカメラから出力さ
れるモニタ映像信号を信号線を介してベースバンド伝送
するとともに、モニタ映像信号の水平同期信号に代えて
モニタ映像信号の周波数帯域よりも高域の高周波バース
ト信号をインターホン子器の映像信号送信部より伝送し
、インターホン親器の映像信号受信部で高周波バースト
信号に基いて水平同期信号を生成してモニタ映像信号に
よるモニタ映像をモニタテレビに表示させるようにした
ことを特徴とするモニタ付きインターホン装置の映像信
号伝送方式。
(1) A monitor camera is installed on the intercom slave side, a monitor TV is installed on the interphone master side, the interphone slave and the interphone master are connected with a signal line made of a pair of wires, and calls are made via the signal line. In a monitor-equipped intercom device that transmits an audio signal, a monitor video signal, and a DC power source, the monitor video signal output from the monitor camera is transmitted via the signal line in baseband, and the horizontal synchronization signal of the monitor video signal is Instead, a high-frequency burst signal with a frequency band higher than the frequency band of the monitor video signal is transmitted from the video signal transmitter of the intercom slave unit, and a horizontal synchronization signal is generated based on the high-frequency burst signal in the video signal receiver of the intercom base unit. A video signal transmission system for an intercom device with a monitor, characterized in that a monitor video signal is displayed on a monitor television.
JP4098188A 1988-02-24 1988-02-24 Video signal transmission system for interphone equipment with monitor Pending JPH01216684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4098188A JPH01216684A (en) 1988-02-24 1988-02-24 Video signal transmission system for interphone equipment with monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4098188A JPH01216684A (en) 1988-02-24 1988-02-24 Video signal transmission system for interphone equipment with monitor

Publications (1)

Publication Number Publication Date
JPH01216684A true JPH01216684A (en) 1989-08-30

Family

ID=12595609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4098188A Pending JPH01216684A (en) 1988-02-24 1988-02-24 Video signal transmission system for interphone equipment with monitor

Country Status (1)

Country Link
JP (1) JPH01216684A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5274000A (en) * 1982-10-19 1993-12-28 Kotobuki Seiyaku Company Limited Benzofuran and benzothiophene derivatives, anti-hyperuricemia agents
JP2008092513A (en) * 2006-10-05 2008-04-17 Kocom Co Ltd Four-wire video phone
JP2016178538A (en) * 2015-03-20 2016-10-06 アイホン株式会社 Collective housing intercom system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5274000A (en) * 1982-10-19 1993-12-28 Kotobuki Seiyaku Company Limited Benzofuran and benzothiophene derivatives, anti-hyperuricemia agents
JP2008092513A (en) * 2006-10-05 2008-04-17 Kocom Co Ltd Four-wire video phone
JP4515431B2 (en) * 2006-10-05 2010-07-28 ココム株式会社 4-wire video phone
JP2016178538A (en) * 2015-03-20 2016-10-06 アイホン株式会社 Collective housing intercom system

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