JPS63156435A - Video sound controlled power multiplexing transmission by balanced two-wire communication cable - Google Patents
Video sound controlled power multiplexing transmission by balanced two-wire communication cableInfo
- Publication number
- JPS63156435A JPS63156435A JP61304813A JP30481386A JPS63156435A JP S63156435 A JPS63156435 A JP S63156435A JP 61304813 A JP61304813 A JP 61304813A JP 30481386 A JP30481386 A JP 30481386A JP S63156435 A JPS63156435 A JP S63156435A
- Authority
- JP
- Japan
- Prior art keywords
- power
- frequency
- video
- signal
- power supply
- 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
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 41
- 238000004891 communication Methods 0.000 title claims description 20
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000005236 sound signal Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000969 carrier Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は平衡二線式通信ケーブルによる映像音声制御電
力多重化伝送装置に係り、特には、双方向伝送される音
声信号のような低周波伝送信号に片方向伝送される電力
を多重化して平衡二線式通信ケーブルを介して電力供給
端側から電力受給端側にχ１して電力を伝送する多重化
伝送装置に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a video/audio control power multiplexing transmission device using a balanced two-wire communication cable, and is particularly applicable to low-frequency signals such as bidirectionally transmitted audio signals. The present invention relates to a multiplex transmission device that multiplexes power that is unidirectionally transmitted into a transmission signal and transmits the power from a power supply end to a power reception end via a balanced two-wire communication cable in the form of χ1.
（従来技術）
例えば、インターホンは消費電力が比較的に少ないので
、これを駆動する電源としては通常、乾電池が用いられ
ている。しかし、既設のインターホンに来訪者を撮像す
るためのいわゆるドアホンカメラを設置しようとした場
合、ドアホンカメラの消費電力は多いのでインターホン
の電源として用いられている乾電池を兼用してドアホン
カメラを駆動することができない。(Prior Art) For example, since intercoms consume relatively little power, dry batteries are normally used as the power source for driving them. However, when trying to install a so-called doorphone camera to take images of visitors on an existing intercom, the doorphone camera consumes a lot of power, so it is necessary to drive the doorphone camera by also using the dry cell battery used as the intercom's power source. I can't.
そのため、このような場合、ドアホンカメラを駆動する
ための電カケープルを別途に敷設しなければならなくな
り、ドアホンカメラ設置の工事費用が高くなるという問
題がある。Therefore, in such a case, it is necessary to separately install an electric cable for driving the doorbell camera, resulting in a problem that the construction cost for installing the doorbell camera increases.
本出願人は、この問題を解決するために、第３図に示す
ような電力伝送装置を提供した（特願昭６１−１００１
８５号、特願昭６．１−１００１８６号、特願昭６１−
１００１８６号参照）。すなわち、第３図はこの従来例
に係る「電力伝送装置」のブロック図であり、第４図は
第３図の定電流レギュレータの回路図である。これらの
図において、１０はこのインピーダンステムにおけろ５
−ｔｔ ｍ、２０は同しくこのインピーダンステムにお
けろ子機である。４０は１ｖＪ、１０と子機２０とを接
続する平衡二線式通信ケーブルである。In order to solve this problem, the present applicant has provided a power transmission device as shown in FIG.
No. 85, Patent Application No. 100186, Patent Application No. 1983-
100186). That is, FIG. 3 is a block diagram of the "power transmission device" according to this conventional example, and FIG. 4 is a circuit diagram of the constant current regulator of FIG. 3. In these figures, 10 is 5 in this impedance stem.
-tt m, 20 is also a child unit in this impedance stem. 40 is a balanced two-wire communication cable connecting 1vJ 10 and slave unit 20.
親機１０は、音声信号処理部と映像信号処理部と電力供
給部とを含む。音声信号処理部はインターホン親機１１
、音声振幅リミッタ１２、直流阻止コンデンサ１３およ
び低域フィルタ１４とを含む。映像信号処理部は、高域
フィルタ１５、周波数復調部１５およびテレビモニタ１
７を含む。電力供給部は、直流電源１８と第１の定電流
レギュレータ１９とを含む。Base unit 10 includes an audio signal processing section, a video signal processing section, and a power supply section. The audio signal processing unit is the intercom base unit 11
, an audio amplitude limiter 12 , a DC blocking capacitor 13 and a low-pass filter 14 . The video signal processing section includes a high-pass filter 15, a frequency demodulation section 15, and a television monitor 1.
Contains 7. The power supply section includes a DC power supply 18 and a first constant current regulator 19.
子機２０は、音声信号処理部と映像信号処理部と電力受
給部とから構成されている。音声信号処理部は、インタ
ーホン子機２１、音声振幅リミッタ２２、直流阻止コン
デンサ２３および低域フィルタ２４を含む。映像信号処
理部は、テレビカメラ２５、周波数変調部２６および高
域フィルタ２７を含む。電力受給部は、第２の定電流レ
ギュレータ２８、電流−電圧変換レギュレータ２９およ
び定電圧レギュレータ３０を含む。The handset 20 includes an audio signal processing section, a video signal processing section, and a power receiving section. The audio signal processing section includes an intercom handset 21, an audio amplitude limiter 22, a DC blocking capacitor 23, and a low-pass filter 24. The video signal processing section includes a television camera 25, a frequency modulation section 26, and a high-pass filter 27. The power receiving section includes a second constant current regulator 28, a current-voltage conversion regulator 29, and a constant voltage regulator 30.
第４図において詳細に示されるように、第１の定電流レ
ギュレータ】９は、ダーリントン接続されたトランジス
タＴＲＩ、ＴＲ２から構成され、第２の定電流レギュレ
ータ２８は同様にトランジスタＴＲビ 、ＴＲ２’ で
構成されている。As shown in detail in FIG. 4, the first constant current regulator 9 is composed of Darlington-connected transistors TRI and TR2, and the second constant current regulator 28 is likewise composed of transistors TRBI and TR2'. It is configured.
このような構成を有する従来例の電力伝送装置では、そ
の従来例の明細書にも記載されているごとく、第１の定
電流レギュレータと第２の定電流レギュレータとにより
、電力供給・受給インピーダンスを、伝送される信号の
帯域にわたる伝送インピーダンスよりも充分に高くなる
ようにしている。そのため、定電流レギュレータは通信
ケーブルを伝送される音声信号等の伝送信号の負荷とな
らない。したがって、電力供給のための特別の通信ケー
ブルを別途に敷設することなく音声信号等用の通信ケー
ブルを用いて電力を供給することが可能となる結果、前
記工事費用の問題が解決される。In the conventional power transmission device having such a configuration, as described in the specification of the conventional example, the power supply/reception impedance is controlled by the first constant current regulator and the second constant current regulator. , the transmission impedance is made to be sufficiently higher than the transmission impedance over the band of the transmitted signal. Therefore, the constant current regulator does not become a load on transmission signals such as audio signals transmitted through the communication cable. Therefore, it becomes possible to supply power using a communication cable for audio signals, etc., without separately installing a special communication cable for power supply, and as a result, the problem of construction costs is solved.
しかしながら、このような構成を有する従来例ては、こ
のように通信ケーブル敷設費用を安価にすることかでき
る反面、複雑な回路構成の定電流レギュレータが必要で
あるのみならず、そこでの電力損失し…当程度に大きく
なり、特に平衡二線式構成の場合ではアースリターン側
にも定電流レギュレータを挿入する必要があるためにそ
の電力損失ら倍増することから非実用的なものとなって
いる。However, while conventional methods with such a configuration can reduce the cost of laying communication cables, they not only require a constant current regulator with a complicated circuit configuration, but also suffer from power loss. ...It becomes quite large, and especially in the case of a balanced two-wire configuration, it is necessary to insert a constant current regulator on the earth return side, which doubles the power loss, making it impractical.
（発明の目的）
本発明は上述の事情に鑑みてなされた乙のであって、平
衡二線式通信ケーブルを介して電力を音声信号等の低周
波伝送信号に多重して伝送する場合に、複雑な回路構成
でしかも電力損失を大きくするデメリットの高い定電流
レギュレータを用いず、その代わりに電源チョークコイ
ルという極めて簡素な回路素子でもって伝送信号に電力
を多重して伝送できるようにすることにより電力損失の
低減化を図れるようにすることを目的とする。(Object of the Invention) The present invention has been made in view of the above-mentioned circumstances, and is intended to address complex problems when multiplexing and transmitting power to low-frequency transmission signals such as audio signals via a balanced two-wire communication cable. Instead of using a constant current regulator, which has a simple circuit configuration and has the disadvantage of increasing power loss, we have made it possible to multiplex power into the transmission signal and transmit it using an extremely simple circuit element called a power supply choke coil. The purpose is to reduce losses.
（発明の構成）
本発明は前記目的を達成するために電力供給端と電力受
給端とを平衡二線式通信ケーブルを介して接続し、前記
電力供給端において電力を映像音声制御信号等の周波数
変調した伝送信号に多重し、これを多重化信号として前
記平衡二線式通信ケーブルを介して伝送し、前記電力受
給端において前記多重化信号から映像音声制御信号と電
力とを分離する映像音声制御電力多重化伝送装置であっ
て、電力供給端側と電力受給端側とのそれぞれに前記伝
送信号を所定のキャリア周波数で周波数変調する周波数
変調手段を設け、前記電力供給端側と前記電力受給端側
とのそれぞれに前記キャリア周波数で周波数変調された
伝送信号に対してはハイインピーダンスとなるインダク
タンス値を有する電源チョークコイルを設け、前記電源
チョークコイルにより前記電力供給端での前記伝送信号
に対する電力の多重化と、前記電力受給端での前記伝送
信号からの映像音声制御信号と電力の分離とを行うこと
を特徴とするものである。(Structure of the Invention) In order to achieve the above object, the present invention connects a power supply end and a power reception end via a balanced two-wire communication cable, and transmits power at a frequency such as a video and audio control signal at the power supply end. Video/audio control that multiplexes the modulated transmission signal, transmits it as a multiplexed signal via the balanced two-wire communication cable, and separates the video/audio control signal and the power from the multiplexed signal at the power receiving end. The power multiplexing transmission device is provided with a frequency modulation means for frequency modulating the transmission signal at a predetermined carrier frequency on each of a power supply end and a power reception end, the power supply end and the power reception end A power supply choke coil having an inductance value that becomes high impedance for a transmission signal frequency-modulated with the carrier frequency is provided on each side, and the power supply choke coil controls the power for the transmission signal at the power supply end. The present invention is characterized in that multiplexing and separation of the video/audio control signal from the transmission signal and the power at the power receiving end are performed.
この構成によれば、電源チョークコイルが前記周波数変
調された伝送信号に対してはハイインピーダンスとなる
から、電力供給端において映像および音声信号等の周波
数変調の伝送信号に電力を多重化し、電力受給端におい
てその周波政変・聞伝送信号から電力を分離することが
できる。According to this configuration, since the power supply choke coil has a high impedance with respect to the frequency-modulated transmission signal, power is multiplexed with frequency-modulated transmission signals such as video and audio signals at the power supply end, and the power is received. At the end, the power can be separated from the transmitted signal at its frequency.
（実施例）
以下、本発明の実施例を図面を参照して詳細に説明する
。第１図は、本発明の実施例に係る平衡二線式通信ケー
ブルによる映像音声制御電力多重化伝送装置が適用され
たインターポンシステムのブロック図である。第１図に
おいて、１００はこのインターホンシステムにおけろ親
機（室内側に配置されている。）、１０２は同じくこの
インターホンシステムにおける子機（玄関側に配置され
ている。）である。１０４は親機１００と子機１０２と
を接続する平衡二線式通信ケーブルである。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an interpon system to which a video/audio control power multiplexing transmission device using a balanced two-wire communication cable according to an embodiment of the present invention is applied. In FIG. 1, 100 is a base unit (located on the indoor side) in this intercom system, and 102 is a slave unit (located on the entrance side) in this intercom system. 104 is a balanced two-wire communication cable that connects the base unit 100 and the slave unit 102.
親機１００の構成
親機ｌＯＯは、音声信号を子機１０２側へ送信処理する
ため子機＋０２側の相手との通話用マイクロホン１０６
と、通話用マイクロホン１０６からの音声信号を、たと
えば２２０ｋＨｚのキャリアで周波数変調する音声周波
数変調部１０８と、音声周波数変調部＋０８の出力を増
幅するアンプ１１０と、アンプ１１０出力を親機出力側
へ出力すると同時に子機側からの伝送信号を入力するラ
イントランス１１２とを具備している。Configuration of the base unit 100 The base unit lOO has a microphone 106 for communicating with the other party on the handset +02 side in order to transmit and process audio signals to the handset 102 side.
, an audio frequency modulation section 108 that frequency-modulates the audio signal from the telephone microphone 106 with a carrier of 220 kHz, for example, an amplifier 110 that amplifies the output of the audio frequency modulation section +08, and an amplifier 110 output to the base unit output side. It is equipped with a line transformer 112 that outputs and simultaneously inputs a transmission signal from the handset side.
親機１００はまた、子機１０２から送信されてきた映像
周波数変調信号と音声周波数変調信号との多重化信号を
受信処理するため、多重化信号からバイパスフィルタ＋
１７（たとえば、遮断周波数０．８ＭＨｚ）とバンドパ
スフィルタ１１９（たとえば、通過域４２０土２０ＫＨ
２）でそれぞれ分波された映像周波数変調信号と音声周
波数変調信号との内、映像信号を周波数復調する映像周
波数組′８部１１８と、映像周波数復調部１１８出力に
従って動作するテレビモニタ１２０と、分波された音声
信号を周波数復調する音声周波数復調部１２２と、音声
周波数復調部１２２出力に従って動作するスピーカ１２
４とを具備している。なお、１１５は直流阻止コンデン
サである。The base unit 100 also receives and processes a multiplexed signal of a video frequency modulation signal and an audio frequency modulation signal transmitted from the slave unit 102, so that a bypass filter +
17 (for example, cutoff frequency 0.8MHz) and a bandpass filter 119 (for example, passband 420Hz 20kHz)
A video frequency group '8 section 118 that frequency demodulates the video signal of the video frequency modulated signal and the audio frequency modulated signal that were demultiplexed in step 2), and a television monitor 120 that operates according to the output of the video frequency demodulator 118; An audio frequency demodulator 122 that demodulates the frequency of the demultiplexed audio signal, and a speaker 12 that operates according to the output of the audio frequency demodulator 122.
4. Note that 115 is a DC blocking capacitor.
親機１００はさらにまた、電力供給部として直流型ａ１
２６と、定電圧レギュレータ１２８とを具備するととも
に、この実施例の特徴構成である電源チョークコイル１
３０，１３１とを具備している。この電源チョークコイ
ル＋３０は電力供給端Ａで直流電力と多重される周波数
変調音声信号に対してはハイインピーダンスを呈する。The main unit 100 furthermore has a DC type a1 as a power supply unit.
26, a constant voltage regulator 128, and a power supply choke coil 1, which is a characteristic configuration of this embodiment.
30,131. This power source choke coil +30 exhibits high impedance to the frequency modulated audio signal multiplexed with the DC power at the power supply end A.
子機１０２の構成
子機１０２は、音声信号と映像信号とを親機１００側へ
送信処理するため親機＋００側の相手との通話用マイク
ロホン１３２と、通話用マイクロホン１３２からの音声
信号を、たとえば４２０に１１ｚのキャリアで周波数変
調する音声周波数変調部１３４と、来訪者を撮像するテ
レビカメラ１３６と、テレビカメラ＋３６からの映像信
号を周波数変調する映像周波数変調部１３８と、前記画
周波数変調１３４．１３８出力を増幅するアンプ１４０
と、その出力をケーブルに送出すると同時に親機からの
受信信号を入力するライントランス１４２とを具備して
いる。Configuration of handset 102 Handset 102 transmits and processes audio signals and video signals to base unit 100 side, and transmits audio signals from microphone 132 for talking to the other party on base unit +00 side, and For example, an audio frequency modulation unit 134 that performs frequency modulation with a carrier of 420 and 11z, a television camera 136 that images a visitor, a video frequency modulation unit 138 that frequency modulates a video signal from the television camera +36, and the image frequency modulation unit 134 .138 Amplifier 140 that amplifies the output
and a line transformer 142 that sends the output to the cable and simultaneously inputs the received signal from the base unit.
子機＋０２は、親機１００から送信されてきた多重化信
号を受信処理するｆ二め、通過帯域がたとえば２２０±
２０Ｋ）［ｚのバンドパスフィルタ１４４と、その出力
を周波数復調する音声周波数復凋部１４８と、スピーカ
１５０とを具備している。The handset +02 receives and processes the multiplexed signal transmitted from the base unit 100, and has a pass band of, for example, 220±.
20K) [z bandpass filter 144, an audio frequency demodulation section 148 for frequency demodulating the output thereof, and a speaker 150.
１５２は直流阻止コンデンサである。152 is a DC blocking capacitor.
子機１０２はさらにまた、電力受給部として電源チョー
クコイル１５４と、定電圧レギュレータ１５６とを具備
している。The handset 102 further includes a power supply choke coil 154 and a constant voltage regulator 156 as a power receiving section.
本実施例で用いた通信ケーブル＋０４（１００ｍ長さ、
０５Φ、２芯）の特性を第２図に示しておく。ａは親機
１００から子機ｌＯ２への音声信号の周波数変調スペク
トル周波数割り当て域、ｂは子機１０２から親機１００
への音声信号の周波数変調キャリアのスペクトル帯域、
Ｃは白黒（Ｂ／Ｗ）の映像信号の周波数変調キャリアの
配置、ｄはＮＴＳＣまたはＰＡＬ方式のカラー映像信号
の周波数変調キャリアの配置の一例である。Communication cable +04 (100m length,
Figure 2 shows the characteristics of 05Φ, 2 cores. a is the frequency modulation spectrum frequency allocation range of the audio signal from the base unit 100 to the slave unit IO2, and b is the frequency allocation range from the slave unit 102 to the base unit 100.
the frequency modulation carrier spectral band of the audio signal,
C is an example of the arrangement of frequency modulated carriers of a black and white (B/W) video signal, and d is an example of the arrangement of frequency modulated carriers of a color video signal of the NTSC or PAL system.
実施例では、映像信号および音声信号の周波数変調キャ
リアのスペクトル帯域を１００ｋＨｚ以上にしているこ
とにより、電力供給端での電力との多重化、電力受給端
での電力の分離に必要な回路素子としての電源チョーク
コイルは、直流電流０．５へ屯畳で、１００マイクロヘ
ンリーを有する小型の乙ので充分に電力の多重化および
分離が可能となる。In the example, by setting the spectral band of the frequency modulated carrier of the video signal and the audio signal to 100kHz or more, it can be used as a circuit element necessary for multiplexing with power at the power supply end and separating power at the power reception end. The power supply choke coil is small and has a DC current of 0.5 to 100 microhenry, so it can sufficiently multiplex and separate the power.
なお、実施例では映像信号のみならず、上りと下りそれ
ぞれの音声信号ら６キヤリア周波数をクロストークしな
いように帯域分割しているから、第３図に示される従来
例のような電力伝送装置における音声信号のベースバン
ド伝送に必要とするハイブリッドトランスや双方向アン
プか不要となる。よた、これのみならず、親機や子機の
それぞれでマイクロホン→アンプ→スピーカ→マイクロ
ホンの閉回路経路でのハウリングの発生ら防ｔｈされろ
ことから、スピーカ音量を増大してインターホンでの通
話の向上に役立つ。In addition, in this embodiment, not only the video signal but also the upstream and downstream audio signals are band-divided to prevent crosstalk between the six carrier frequencies. There is no need for a hybrid transformer or bidirectional amplifier required for baseband transmission of audio signals. In addition to this, howling should be prevented from occurring in the closed circuit path of microphone -> amplifier -> speaker -> microphone on each of the base unit and slave unit, so it is recommended to increase the speaker volume when talking over the intercom. It helps to improve.
さらに、音声信号の周波数変調スペクトル帯域を５００
ｋ Ｈｚ ＝ １．５ Ｍｌｌｚｌｌ下帯することお
よび平衡、不平衡変換用のライントランス１１２．１４
２を使うことにより、中波電界強度の高い地域で長いイ
ンターホンケーブルを用いる場合はそのケーブルに誘起
される中波の妨害を軽減することができる。Furthermore, the frequency modulation spectrum band of the audio signal is
kHz = 1.5 Line transformer for subbanding and balanced, unbalanced conversion 112.14
By using 2, when using a long intercom cable in an area with high medium wave electric field strength, it is possible to reduce medium wave interference induced in the cable.
（発明の効果）
以上説明したことから明らかなように、本発明によれば
、電源チョークコイルが少なくとも１００ＫＨｚ以上の
周波数変調伝送信号に対してはハイインピーダンスとな
るから、電力供給端において音声制御信号および映像信
号の周波数変調伝送信号に電力を多重し、電力受給端に
おいてその周波数変調伝送信号から電力を分離すること
ができる。(Effects of the Invention) As is clear from the above explanation, according to the present invention, since the power source choke coil becomes high impedance for frequency modulated transmission signals of at least 100 KHz or more, the voice control signal is not transmitted at the power supply end. It is possible to multiplex power to the frequency modulated transmission signal of the video signal and the video signal, and separate the power from the frequency modulated transmission signal at the power receiving end.
したかって、本発明では、電力の伝送には音声信号およ
び映像信号等の通信ケーブルと別途に電力伝送用ケーブ
ルを敷設する必要がないという利点とともに、従来例の
ような複雑な回路構成の定電流レギュレータが不要とな
る結果、そこでの大きな電力損失が解消される。Therefore, the present invention has the advantage that it is not necessary to lay a power transmission cable separately from communication cables for audio signals, video signals, etc. for power transmission, and it also has the advantage that it is not necessary to lay a power transmission cable separately from communication cables for audio signals, video signals, etc. As a result of eliminating the need for a regulator, large power losses therein are eliminated.
第１図は本発明の一実施例のブロック図、第２図は第１
図の装置に使用される通信ケーブルの伝送特性図、第３
図は従来例のブロック図、第４図は第３図の定電流レギ
ュレータの回路図である。
１００は親機、１０２は子機、ｌＯ・ｔは通信ケーブル
、１３０，１３１，１５４，１５５は電源チョークコイ
ル。FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
Transmission characteristics diagram of the communication cable used in the device shown in Figure 3.
The figure is a block diagram of a conventional example, and FIG. 4 is a circuit diagram of the constant current regulator of FIG. 3. 100 is a master unit, 102 is a slave unit, lO·t is a communication cable, and 130, 131, 154, 155 are power supply choke coils.
Claims (1)
区別し電力供給端という）と他方の映像音声制御電力多
重化端（以下、電力受給端という）とを平衡二線式通信
ケーブルを介して接続し、前記電力供給端において電力
を映像音声制御等の伝送信号に多重化し、これを多重化
信号として前記平衡二線式通信ケーブルを介して伝送し
、前記電力受給端において前記多重化信号から音声制御
信号および電力を分離する一方、電力供給端では、前記
電力受給端から送られてくる映像音声制御情報を分離す
る映像音声制御電力多重化伝送装置であって、 電力供給端側と電力受給端側とのそれぞれに前記伝送信
号を所定のキャリア周波数で周波数変調する周波数変調
手段を設け、さらに、所定のキャリア周波数配置による
映像信号用周波数変調手段を電力受給端に設け、 前記電力供給端側と前記電力受給端側とのそれぞれに前
記キャリア周波数で周波数変調された伝送信号に対して
はハイインピーダンスとなるインダクタンス値を有する
電源チョークコイルを設け、前記電源チョークコイルに
より前記電力供給端での前記伝送信号に対する電力の多
重化と、前記電力受給端での前記伝送信号からの音声制
御信号と電力の分離とを行うことを特徴とする映像音声
制御電力多重化伝送装置。(1) A balanced two-wire communication cable connecting the video/audio control power multiplexing end (hereinafter referred to as the power supply end, distinguished by power transmission/reception) and the other video/audio control power multiplexing end (hereinafter referred to as the power receiving end) The power supply end multiplexes the power into a transmission signal such as video/audio control, and this is transmitted as a multiplexed signal through the balanced two-wire communication cable, and the power reception end multiplexes the power into a transmission signal such as video/audio control. A video/audio control power multiplexing transmission device that separates an audio control signal and power from a power supply signal, and separates video/audio control information sent from the power receiving end at a power supply end, the power supply end side A frequency modulation means for frequency modulating the transmission signal with a predetermined carrier frequency is provided on each of the power receiving end and a frequency modulating means for frequency modulating the transmission signal with a predetermined carrier frequency, and further, a frequency modulation means for a video signal with a predetermined carrier frequency arrangement is provided on the power receiving end, A power supply choke coil having an inductance value that becomes high impedance for a transmission signal frequency-modulated with the carrier frequency is provided on each of the supply end side and the power reception end side, and the power supply choke coil connects the power supply end. A video/audio control power multiplexing transmission device, characterized in that multiplexing power for the transmission signal at the power receiving end and separating the power from the audio control signal from the transmission signal at the power receiving end.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61304813A JPS63156435A (en) | 1986-12-19 | 1986-12-19 | Video sound controlled power multiplexing transmission by balanced two-wire communication cable |
| EP87304780A EP0271969B1 (en) | 1986-12-19 | 1987-05-29 | DC power-superposed multiplex transmission system with single parallel cable |
| US07/055,439 US4868815A (en) | 1986-12-19 | 1987-05-29 | Power transmission system |
| DE3750809T DE3750809T2 (en) | 1986-12-19 | 1987-05-29 | Multiplex transmission system with superimposed DC power supply and a single parallel cable. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61304813A JPS63156435A (en) | 1986-12-19 | 1986-12-19 | Video sound controlled power multiplexing transmission by balanced two-wire communication cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63156435A true JPS63156435A (en) | 1988-06-29 |
Family
ID=17937557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61304813A Pending JPS63156435A (en) | 1986-12-19 | 1986-12-19 | Video sound controlled power multiplexing transmission by balanced two-wire communication cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63156435A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006325141A (en) * | 2005-05-20 | 2006-11-30 | Matsushita Electric Works Ltd | Video transmission system |
| JP2010093462A (en) * | 2008-10-07 | 2010-04-22 | Sony Corp | Information processing apparatus and signal transmission method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58171184A (en) * | 1982-03-31 | 1983-10-07 | Matsushita Electric Works Ltd | Interphone device provided with monitor television |
-
1986
- 1986-12-19 JP JP61304813A patent/JPS63156435A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58171184A (en) * | 1982-03-31 | 1983-10-07 | Matsushita Electric Works Ltd | Interphone device provided with monitor television |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006325141A (en) * | 2005-05-20 | 2006-11-30 | Matsushita Electric Works Ltd | Video transmission system |
| JP2010093462A (en) * | 2008-10-07 | 2010-04-22 | Sony Corp | Information processing apparatus and signal transmission method |
| US8625639B2 (en) | 2008-10-07 | 2014-01-07 | Sony Corporation | Information processing apparatus and signal transmission method |
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