JPH053774B2 - - Google Patents
Info
- Publication number
- JPH053774B2 JPH053774B2 JP58242441A JP24244183A JPH053774B2 JP H053774 B2 JPH053774 B2 JP H053774B2 JP 58242441 A JP58242441 A JP 58242441A JP 24244183 A JP24244183 A JP 24244183A JP H053774 B2 JPH053774 B2 JP H053774B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- broadcast
- signals
- equipment
- channels
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Details Of Television Systems (AREA)
- Television Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Small-Scale Networks (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、一系統の伝送線路、複数の端末装置
および放送受信用のアンテナ設備より構成される
ホームバスシステムに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a home bus system consisting of one transmission line, a plurality of terminal devices, and antenna equipment for broadcast reception.
従来例の構成とその問題点
従来、共聴システムを構成する場合、端末側か
らのオーデイオ・ビデオ信号（以下AV信号と略
す）は、上り信号用に設定された周波数に変調さ
れ、ヘツドエンドに入力された後、ヘツドエンド
内で放送波帯（1ch〜62ch）の空チヤネルに周波
数変換し再送信するという方式を採用していた。
したがつて、上り信号は、上り信号用に設定され
たチヤネル数しか伝送できず、また高価なヘツド
エンドが必要であるという欠点があつた。Conventional configuration and its problems Conventionally, when configuring a communal listening system, audio/video signals (hereinafter referred to as AV signals) from the terminal side are modulated to a frequency set for upstream signals and input to the head end. After that, the headend converted the frequency to an empty channel in the broadcast wave band (ch to 62) and retransmitted it.
Therefore, upstream signals can only be transmitted through the number of channels set for upstream signals, and an expensive head end is required.
発明の目的
本発明は、ヘツドエンドを使用せずに共聴シス
テムを構成し、また同時に放送波帯の空チヤネル
を利用することにより、上り信号のチヤネル数を
拡大することのできるホームバスシステムを提供
することを目的とするものである。Purpose of the Invention The present invention provides a home bus system that can configure a public listening system without using a headend and expand the number of upstream signal channels by simultaneously using empty channels in the broadcast wave band. The purpose is to
発明の構成
本発明は一系統の伝送線路、複数の端末装置、
放送受信用のアンテナ設備およびブースターより
構成されており、端末装置はオーデイオ・ビデオ
機器（以下AV機器と略す）および、AV機器と
伝送線路とを接続するためのインターフエースで
構成される。Configuration of the Invention The present invention includes a transmission line, a plurality of terminal devices,
It consists of antenna equipment and a booster for broadcast reception, and the terminal equipment consists of audio/video equipment (hereinafter referred to as AV equipment) and an interface for connecting the AV equipment and the transmission line.
実施例の説明
以下、図面に従い本発明の実施例を詳細に説明
する。DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は本発明を実施するのに適した共聴シス
テムのブロツク構成図である。１は同軸ケーブル
を用いた伝送線路、２−１〜２−ｎは信号を分岐
するためのタツプオフ、３−１〜３−ｎは伝送線
路とAV機器を接続するためのインターフエー
ス、４−１〜４−ｎは変復調器を有するAV機
器、５は放送波を増幅するためのブースター、６
は混合器８とブースター５を接続するための同軸
ケーブル、７−１〜７−３はFM放送、VHF放
送、UHF放送を受信するためのアンテナ設備、
８はFM放送波、VHF放送波、UHF放送波を混
合するための混合器である。 FIG. 1 is a block diagram of a communal listening system suitable for implementing the present invention. 1 is a transmission line using a coaxial cable, 2-1 to 2-n are tap-offs for branching signals, 3-1 to 3-n are interfaces for connecting the transmission line and AV equipment, 4-1 ~4-n is an AV device with a modem, 5 is a booster for amplifying broadcast waves, 6 is
is a coaxial cable for connecting mixer 8 and booster 5, 7-1 to 7-3 are antenna equipment for receiving FM broadcast, VHF broadcast, and UHF broadcast,
8 is a mixer for mixing FM broadcast waves, VHF broadcast waves, and UHF broadcast waves.
第２図は伝送路上の信号の周波数割当ての一例
である。９はデジタル・データ用のベースバン
ド、１０はインターホンなどの音声信号の変調波
を伝送するサブバンド、１１はFM放送波帯、１
２はTV放送波帯、１３−１〜１３−62はTV放
送のチヤネル１〜チヤネル62である。 FIG. 2 is an example of frequency assignment of signals on a transmission path. 9 is a baseband for digital data, 10 is a subband that transmits a modulated wave of an audio signal such as an intercom, 11 is an FM broadcast wave band, 1
2 is a TV broadcast wave band, and 13-1 to 13-62 are TV broadcast channels 1 to 62.
従来の共聴システムでは端末側のAV機器４−
１〜４−ｎから送信するAV信号はいつたんサブ
バンド１０の周波数帯に変調されて、ヘツドエン
ドに送られ、次にヘツドエンド内で、サブバンド
の周波数から、TV放送波帯１２の空チヤネル
（１３−１〜１３−ｍ）に変更を行ない、端末装
置に向けて再送信する方式であつた。 In the conventional public listening system, the AV equipment 4- on the terminal side
The AV signals transmitted from 1 to 4-n are modulated into the frequency band of sub-band 10 and sent to the head end, and then within the head end, the frequency of the sub-band is modulated into an empty channel of TV broadcast wave band 12 ( 13-1 to 13-m) and retransmitted to the terminal device.
これに対して本発明では、AV機器４−１〜４
−ｎから送出するAV信号をRF変調しTV放送波
帯１２の空チヤネル（１３−１〜１３−ｍ）のい
ずれかかの周波数で送出する。受信側のAV機器
は受信チヤネルを送信チヤネルに設定することに
より受信可能である。この方式を採用することに
より、サブチヤネル１０を使用する必要がない。
従つてサブチヤネル１０からTV放送波帯１２へ
の周波数変換をおこなう必要がないため、高価な
ヘツドエンドを使用せずに共聴システムを構成で
きる。また従来ヘツドエンド内でおこなつていた
放送波の増幅は伝送路１の前に挿入したブースタ
ー５がおこなう。また従来のヘツドエンドを用い
た方式では端末側のAV機器からのAV信号は上
り信号用に特別に設定されたチヤネル数だけしか
送信できなかつたが、本発明を利用すればTV波
送帯の空チヤネル数以内であれば無制限に送信す
ることが可能である。 In contrast, in the present invention, the AV devices 4-1 to 4
The AV signal transmitted from -n is RF-modulated and transmitted at one of the frequencies of the empty channels (13-1 to 13-m) in the TV broadcast wave band 12. The AV device on the receiving side can receive by setting the receiving channel to the transmitting channel. By adopting this method, there is no need to use the subchannel 10.
Therefore, since there is no need to perform frequency conversion from the subchannel 10 to the TV broadcast wave band 12, a public listening system can be constructed without using an expensive head end. Further, the booster 5 inserted in front of the transmission line 1 performs amplification of the broadcast waves, which was conventionally performed within the head end. In addition, in the conventional method using a head end, the AV signal from the AV equipment on the terminal side could only be transmitted through the number of channels specially set for uplink signals, but with the present invention, the TV wave transmission band is empty. It is possible to transmit unlimitedly within the number of channels.
発明の効果
本発明を利用することにより、高価なヘツドエ
ンドを使用することなく共聴システムを構成する
ことが可能なため、システム全体のコストを下げ
ることができる。また上り信号用に特別のチヤネ
ルを設定する必要がないので、チヤネル数の制限
がなくなる。Effects of the Invention By using the present invention, it is possible to configure a public listening system without using an expensive head end, so the cost of the entire system can be reduced. Furthermore, since there is no need to set up a special channel for uplink signals, there is no restriction on the number of channels.
第１図は本発明の一実施例におけるホームバス
システムの全体構成を示すブロツク図、第２図は
伝送線路上の周波数の割り当てを示す特性図であ
る。
１……伝送線路、２−１〜２−ｎ……タツプオ
フ、３−１〜３−ｎ……インターフエース、４−
１〜４−ｎ……AV機器、５……ブースター、６
……同軸ケーブル、７−１〜７−３……アンテナ
設備、８……混合器、９……ベースバンド、１０
……サブバンド、１１……FM放送波帯、１２…
…TV放送波帯。
FIG. 1 is a block diagram showing the overall configuration of a home bus system according to an embodiment of the present invention, and FIG. 2 is a characteristic diagram showing frequency assignment on a transmission line. 1...Transmission line, 2-1 to 2-n...Tap-off, 3-1 to 3-n...Interface, 4-
1-4-n...AV equipment, 5...Booster, 6
... Coaxial cable, 7-1 to 7-3 ... Antenna equipment, 8 ... Mixer, 9 ... Baseband, 10
...Subband, 11...FM broadcast wave band, 12...
...TV broadcast wave band.
Claims (1)
前記伝送線路上の信号を分岐するために前記伝送
線路上に設置した双方向性のタツプオフと、前記
タツプオフの接続された、ベースバンドでの通信
回線制御をおこなうインターフエース・ユニツト
と前記ユニツトに接続されるオーデイオビデオ信
号を送受するための変復調器を有する複数のオー
デイオビデオ機器と、FM放送、TV放送を受信
し伝送線路上に送るためのアンテナ設備より構成
されるホームバスシステム。1 A transmission line using coaxial cable,
A bidirectional tap-off installed on the transmission line for branching signals on the transmission line, and an interface unit connected to the tap-off that performs baseband communication line control and connected to the unit. A home bus system consists of multiple audio/video devices with modulators and demodulators for transmitting and receiving audio/video signals, and antenna equipment for receiving FM broadcasts and TV broadcasts and transmitting them onto transmission lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58242441A JPS60134540A (en) | 1983-12-22 | 1983-12-22 | Home bus system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58242441A JPS60134540A (en) | 1983-12-22 | 1983-12-22 | Home bus system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60134540A JPS60134540A (en) | 1985-07-17 |
| JPH053774B2 true JPH053774B2 (en) | 1993-01-18 |
Family
ID=17089133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58242441A Granted JPS60134540A (en) | 1983-12-22 | 1983-12-22 | Home bus system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60134540A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5101191A (en) * | 1987-12-01 | 1992-03-31 | Smart House Limited Partnership | Electrical and communication system capable of providing uninterruptable power in a house |
| US4899217A (en) * | 1987-12-01 | 1990-02-06 | Smart House Limited Partnership | Communication and energy control system for houses |
-
1983
- 1983-12-22 JP JP58242441A patent/JPS60134540A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60134540A (en) | 1985-07-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |