JP2002158935A - Television wireless transmission system - Google Patents
Television wireless transmission systemInfo
- Publication number
- JP2002158935A JP2002158935A JP2000351624A JP2000351624A JP2002158935A JP 2002158935 A JP2002158935 A JP 2002158935A JP 2000351624 A JP2000351624 A JP 2000351624A JP 2000351624 A JP2000351624 A JP 2000351624A JP 2002158935 A JP2002158935 A JP 2002158935A
- Authority
- JP
- Japan
- Prior art keywords
- television
- signal
- channel
- circuit
- tuner
- 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
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- Details Of Television Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、テレビワイヤレス
伝送システムに関する。The present invention relates to a television wireless transmission system.
【０００２】[0002]
【従来の技術】テレビアンテナ端子がない場所でテレビ
の受信を可能にする手段としては、従来、テレビ受信機
（以下「テレビ」という）にテレビ電波受信用の室内用
アンテナを設けることが知られている。2. Description of the Related Art Conventionally, as a means for enabling reception of television in a place where there is no television antenna terminal, it has been known to provide a television receiver (hereinafter referred to as "television") with an indoor antenna for receiving television waves. ing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、微弱な
テレビ電波を受信するためには、室内用アンテナはある
程度の大きさが必要であり、その置き場所に苦慮するこ
とになる。これに対して、テレビアンテナ端子に無線送
信機を接続し、テレビ電波を増幅して再送信するとい
う、ブースタータイプの構成も考えられている。However, in order to receive a weak television wave, the indoor antenna needs to have a certain size, and it is difficult to place the indoor antenna. On the other hand, a booster type configuration in which a wireless transmitter is connected to a television antenna terminal to amplify and retransmit a television wave has been considered.
【０００４】しかしながら、テレビのチャンネル帯域は
広く、各チャンネルの周波数は著しく異なる。このよう
な広範な帯域のテレビ信号を、１台の送信装置で送信す
ることは困難である。そこで、どのチャンネルのテレビ
信号でも、ある特定の空きチャンネル周波数に変換して
無線送信することが考えられるが、そのようにすると、
今度は、テレビ側でチャンネル切換をして異なる番組を
見ることができなくなり、チャンネル切換は送信装置側
で行わねばならないという面倒なことになる。[0004] However, the channel band of a television is wide, and the frequency of each channel is significantly different. It is difficult to transmit a television signal in such a wide band with one transmission device. Therefore, it is conceivable to convert the TV signal of any channel to a specific free channel frequency and wirelessly transmit it.
This time, it becomes impossible to switch channels on the television side to view different programs, and it becomes troublesome that the channel switching must be performed on the transmission device side.
【０００５】本発明は、上記事情に鑑みてなされたもの
で、その目的は、テレビアンテナ端子がない場所でもテ
レビが受信でき、それでいながら、テレビ側でチャンネ
ル切換を行うことができるテレビワイヤレス伝送システ
ムを提供するところにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a television wireless transmission that can receive a television even in a place where a television antenna terminal is not provided and that can perform channel switching on the television side. Is to provide the system.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の発明に係るテレビワイヤレス伝送システ
ムは、テレビ信号端子に接続される送信装置と、その送
信装置からの電波を受信する受信装置とを備えてなり、
送信装置には、テレビ信号端子に接続されるチューナ
と、このチューナにより選択されたチャンネルのテレビ
信号を無線送信する送信回路と、無線信号を受けてチュ
ーナにチャンネル切換動作をさせるチャンネル切換回路
とを備え、受信装置には、送信回路から送信されたテレ
ビ信号を受信して映像信号及び音声信号を生成する受信
回路と、送信装置のチャンネル切換回路に無線信号を送
るチャンネル切換信号送信回路とを備えたところに特徴
を有する。To achieve the above object, a television wireless transmission system according to the first aspect of the present invention includes a transmitting device connected to a television signal terminal and a receiving device for receiving radio waves from the transmitting device. Equipment and
The transmitting device includes a tuner connected to the television signal terminal, a transmitting circuit that wirelessly transmits a television signal of a channel selected by the tuner, and a channel switching circuit that receives the wireless signal and causes the tuner to perform a channel switching operation. The receiving device includes a receiving circuit that receives a television signal transmitted from the transmitting circuit and generates a video signal and an audio signal, and a channel switching signal transmitting circuit that transmits a wireless signal to a channel switching circuit of the transmitting device. It has features in other places.
【０００７】[0007]
【発明の作用及び効果】＜請求項１の発明＞請求項１の
構成によれば、送信装置において、テレビ信号端子から
のテレビ信号は、チューナを介して送信回路により無線
送信され、受信装置において、受信回路により、そのテ
レビを受信して映像信号及び音声信号が生成される。こ
れにより、テレビアンテナ端子がない場所でテレビを受
信することができる。従って、例えば市販のテレビ受信
機の映像及び音声入力端子に接続すれば、そのテレビア
ンテナ端子がない場所でテレビを見ることができる。こ
こで、送信回路は、テレビ信号端子からのテレビ信号の
うち、チューナにより選択されたチャンネルのテレビ信
号のみを無線送信する。そして、そのチューナのチャン
ネルは、受信装置において、チャンネル切替信号送信回
路からチャンネル切替信号を無線送信すれば、送信装置
において、チャンネル切換回路により、その無線信号に
基づいて、チューナのチャンネルを切り替える。これに
より、わざわざ送信装置側に行かなくても、受信装置側
でテレビのチャンネル切換を行うことが可能になる。According to the first aspect of the present invention, in the transmitting device, the television signal from the television signal terminal is wirelessly transmitted by the transmitting circuit via the tuner, and is transmitted to the receiving device. The receiving circuit receives the television and generates a video signal and an audio signal. Thereby, television can be received in a place where there is no television antenna terminal. Therefore, for example, by connecting to a video and audio input terminal of a commercially available television receiver, the television can be watched in a place where there is no television antenna terminal. Here, the transmission circuit wirelessly transmits only the television signal of the channel selected by the tuner among the television signals from the television signal terminal. Then, when the channel of the tuner is wirelessly transmitted from the channel switching signal transmitting circuit in the receiving device, the channel of the tuner is switched by the channel switching circuit in the transmitting device based on the wireless signal. Thus, it is possible to switch the television channel on the receiving device side without going to the transmitting device.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施形態について
図１を参照して説明する。本実施形態に係るテレビワイ
ヤレス伝送システム１０は、図１に示すように、屋外ア
ンテナ１からの配線に接続されたアンテナ端子２がある
部屋Ａに送信装置２０を設けて、アンテナ端子がない部
屋Ｂに受信装置３０を設けらて、無線回線を介してアン
テナ端子がない部屋Ｂでもテレビの受信を可能にするた
めのものである。An embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1, the TV wireless transmission system 10 according to the present embodiment includes a transmitting device 20 in a room A having an antenna terminal 2 connected to a wiring from an outdoor antenna 1 and a room B having no antenna terminal. The receiving device 30 is provided to enable reception of television even in a room B having no antenna terminal via a wireless line.
【０００９】送信装置２０には、チューナ２１、送信回
路２２及びチャンネル切替回路２３が設けられている。
このうち、チューナ２１に対しては、その入力端子に部
屋Ａのアンテナ端子２が接続され、出力端子に送信回路
２２が接続されている。また、チューナ２１の信号端子
には、チャンネル切替回路２３が接続されている。The transmitting device 20 is provided with a tuner 21, a transmitting circuit 22, and a channel switching circuit 23.
The tuner 21 has an input terminal connected to the antenna terminal 2 of the room A, and an output terminal connected to the transmission circuit 22. A channel switching circuit 23 is connected to a signal terminal of the tuner 21.
【００１０】一方、受信装置３０は、例えば市販のテレ
ビ受信機（以下「テレビ４０」という）と接続コードを
介して接続されている。より詳細には、受信装置３０に
対して、その音声出力端子にテレビ４０側のＡＶ機器用
の音声入力端子が、その映像出力端子にテレビ４０側の
ＡＶ機器用の映像入力端子がそれぞれ接続されている。
また、受信装置３０には、送信装置２０側から無線送信
されたテレビ信号を受信する受信回路３１、チャンネル
切替信号送信回路３６及びチャンネル切替スイッチ３７
が設けられている。On the other hand, the receiving device 30 is connected to, for example, a commercially available television receiver (hereinafter referred to as “television 40”) via a connection cord. More specifically, the audio output terminal of the receiving device 30 is connected to an audio input terminal for AV equipment on the television 40 side, and the video output terminal is connected to a video input terminal for AV equipment on the television 40 side. ing.
The receiving device 30 includes a receiving circuit 31 that receives a television signal wirelessly transmitted from the transmitting device 20, a channel switching signal transmitting circuit 36, and a channel switching switch 37.
Is provided.
【００１１】受信回路３１には、受信したテレビ信号を
増幅する増幅回路３２と、その増幅されたテレビ信号を
映像信号及び音声信号に分離する映像検波回路３３と、
分離された両信号をそれぞれ電気信号に変換する音声変
換回路３４及び映像変換回路３５とから構成される。音
声変換回路３４及び映像変換回路３５は、それぞれ前記
音声出力端子及び映像出力端子に接続されている。これ
により、音声変換回路３４により変換された音声信号
は、テレビ４０側の音声回路４１を介してスピーカ４２
から出力され、映像変換回路３５により変換された映像
信号は、テレビ４０側の画像回路４３及びディスプレイ
制御回路４４を介して液晶ディスプレイ（以下「ＬＣＤ
４５」という）にて出力されることとなる。なお、本実
施形態では、音声信号及び映像信号をテレビ信号として
同一の増幅回路で増幅するインタキャリア方式を採用し
たが、音声信号と映像信号とに分離後にそれぞれ増幅す
るスプリットキャリア方式を採用するものであっても良
い。The receiving circuit 31 includes an amplifying circuit 32 for amplifying the received television signal, a video detecting circuit 33 for separating the amplified television signal into a video signal and an audio signal,
It is composed of an audio conversion circuit 34 and a video conversion circuit 35 for converting both of the separated signals into electric signals. The audio conversion circuit 34 and the video conversion circuit 35 are connected to the audio output terminal and the video output terminal, respectively. Thus, the audio signal converted by the audio conversion circuit 34 is transmitted to the speaker 42 via the audio circuit 41 of the television 40.
The video signal output from the video conversion circuit 35 and converted by the video conversion circuit 35 is transmitted to a liquid crystal display (hereinafter, “LCD”) through an image circuit 43 and a display control circuit 44 on the television 40 side.
45 "). In the present embodiment, the intercarrier system in which the audio signal and the video signal are amplified as the television signal by the same amplifier circuit is adopted, but the split carrier system in which the audio signal and the video signal are amplified after being separated into the audio signal and the video signal is adopted. It may be.
【００１２】また、チャンネル切替信号送信回路３６
は、チャンネル切替スイッチ３７からのチャンネル切替
信号を受け取って、送信装置２０側のチャンネル切替回
路２３に無線送信する。Further, a channel switching signal transmitting circuit 36
Receives the channel switching signal from the channel switching switch 37 and wirelessly transmits the signal to the channel switching circuit 23 of the transmitting device 20.
【００１３】次に、上記構成からなる本実施形態の動作
を説明する。アンテナ端子２がない部屋Ｂでテレビを見
たいときには、まず部屋Ａ内の送信装置２０、部屋Ｂ内
のテレビ４０及び受信装置３０の電源を入れる。する
と、送信装置２０側では、チューナ２１において、アン
テナ端子２からの高周波テレビ信号のうち、選択された
チャンネルのテレビ信号のみが、スーパーヘテロダイン
方式により中間周波数に増幅されて送信回路２２に伝送
される。そして、送信回路２２において、前記選択され
たチャンネルに関係なくどのチャンネルのテレビ信号も
単一の所定周波数の搬送波に乗せて送信される。一方、
受信装置３０側では、上述したように受信回路３１にて
受信したテレビ信号から音声信号及び映像信号が生成さ
れ、テレビ４０のスピーカ４２及びＬＣＤ４５にてそれ
ぞれ出力される。これにより部屋Ｂでもテレビ信号を受
信してテレビを見ることができる。Next, the operation of this embodiment having the above configuration will be described. When the user wants to watch a television in the room B without the antenna terminal 2, first, the power of the transmitting device 20 in the room A, the television 40 in the room B, and the receiving device 30 are turned on. Then, on the transmitting device 20 side, in the tuner 21, only the television signal of the selected channel among the high-frequency television signals from the antenna terminal 2 is amplified to the intermediate frequency by the superheterodyne method and transmitted to the transmitting circuit 22. . Then, in the transmission circuit 22, the television signal of any channel is transmitted on a single carrier of a predetermined frequency regardless of the selected channel. on the other hand,
On the receiving device 30 side, an audio signal and a video signal are generated from the television signal received by the receiving circuit 31 as described above, and are output from the speaker 42 and the LCD 45 of the television 40, respectively. Accordingly, the television signal can be received and the television can be watched even in the room B.
【００１４】また、テレビ４０のチャンネルを変えたい
場合には、受信装置３０のチャンネル切替スイッチ３７
で所望のチャンネルに切り替えれば、そのチャンネルに
対応した切替信号が、チャンネル切替信号送信回路３６
にて、送信装置２０側に無線送信される。一方、送信装
置２０側では、チャンネル切替回路２３により、送信さ
れたチャンネル切替信号に基づいてチューナ２１のチャ
ンネルを切り替える。これにより、わざわざ送信装置２
０側に行かなくても受信装置３０側でチャンネル切換を
行うことが可能になる。When it is desired to change the channel of the television 40, the channel changeover switch 37 of the receiver 30 is used.
Is switched to a desired channel, a switching signal corresponding to the channel is transmitted to the channel switching signal transmitting circuit 36.
Is transmitted wirelessly to the transmitting device 20 side. On the transmission device 20 side, the channel of the tuner 21 is switched by the channel switching circuit 23 based on the transmitted channel switching signal. Thereby, the transmission device 2
Channel switching can be performed on the receiving device 30 side without going to the 0 side.
【００１５】＜他の実施形態＞本発明は、前記実施形態
に限定されるものではなく、例えば、以下に説明するよ
うな実施形態も本発明の技術的範囲に含まれ、さらに、
下記以外にも要旨を逸脱しない範囲内で種々変更して実
施することができる。 （１）前記実施形態においては、テレビ４０に対して、
音声信号及び映像信号の伝送方法として、受信装置４０
にて予め両信号を電気信号に変換後、テレビ側のＡＶ機
器用の入力端子を介して伝送することとしたが、これに
限られない。例えば、受信装置３０をテレビ４０のテレ
ビ電波専用入力端子に接続して、送信装置側２０で選択
されたチャンネルのテレビ信号を、テレビ４０のある特
定の空きチャンネル周波数に変換して無線送信し、受信
装置３０側では電気信号に変換することなく、テレビ４
０側の空きチャンネルを利用して伝送するように構成さ
れるものでも良い。<Other Embodiments> The present invention is not limited to the above embodiments. For example, the following embodiments are also included in the technical scope of the present invention.
In addition to the following, various changes can be made without departing from the scope of the invention. (1) In the above embodiment, the television 40
As a method of transmitting an audio signal and a video signal, a receiving device 40
After converting both signals into electric signals in advance, the signals are transmitted via the input terminal for AV equipment on the television side, but the present invention is not limited to this. For example, the receiving device 30 is connected to the TV radio input terminal of the TV 40, the TV signal of the channel selected by the transmitting device 20 is converted to a certain free channel frequency of the TV 40, and is wirelessly transmitted. On the receiving device 30 side, the TV 4
It may be configured to transmit using an empty channel on the 0 side.
【００１６】（２）前記実施形態においては、送信装置
２０には、チューナ２１が１台だけ搭載される構成とし
たが、これに限られず、チューナを複数台搭載して、各
チューナに対応した複数台の受信装置を設けて、各受信
装置がそれぞれ対応した各チューナからのテレビ信号の
みを受信するように構成したものであっても良い。この
ような構成によれば、アンテナ端子がない複数の部屋で
それぞれテレビを受信することが可能になる。(2) In the above-described embodiment, only one tuner 21 is mounted on the transmission device 20. However, the present invention is not limited to this, and a plurality of tuners are mounted to correspond to each tuner. A plurality of receiving devices may be provided so that each receiving device receives only a television signal from each corresponding tuner. According to such a configuration, it is possible to receive television in a plurality of rooms without an antenna terminal.
【００１７】（３）前記実施形態においては、テレビ信
号端子は、屋外アンテナからのテレビ電波を受け取るア
ンテナ端子としたが、これに限られず、例えばケーブル
テレビ専用端子や光ファイバ通信専用端子であっても良
い。(3) In the above embodiment, the television signal terminal is an antenna terminal for receiving television waves from an outdoor antenna. However, the invention is not limited to this. For example, a terminal exclusively for cable television or a terminal exclusively for optical fiber communication may be used. Is also good.
【図１】本発明の一実施形態に係るテレビワイヤレス伝
送システムを示すブロック図FIG. 1 is a block diagram showing a television wireless transmission system according to an embodiment of the present invention.
１０…テレビワイヤレス伝送システム ２０…送信装置 ２１…チューナ ２２…送信回路 ２３…チャンネル切替回路 ３０…受信装置 ３１…受信回路 ３６…チャンネル切替信号送信回路 ４０…テレビ DESCRIPTION OF SYMBOLS 10 ... TV wireless transmission system 20 ... Transmission apparatus 21 ... Tuner 22 ... Transmission circuit 23 ... Channel switching circuit 30 ... Receiving apparatus 31 ... Receiving circuit 36 ... Channel switching signal transmission circuit 40 ... Television
フロントページの続き (72)発明者 石井 泰博 岐阜県揖斐郡揖斐川町北方１−１ イビデ ン株式会社内 Ｆターム(参考） 5C025 AA01 AA09 AA10 AA23 AA25 AA28 BA21 5C056 FA01 HA01 HA04 Continuation of the front page (72) Inventor Yasuhiro Ishii 1-1, Ibikawa-cho, Ibi-gun, Gifu Prefecture Inside Fibi term (reference) 5C025 AA01 AA09 AA10 AA23 AA25 AA28 BA21 5C056 FA01 HA01 HA04
Claims (1)
と、その送信装置からの電波を受信する受信装置とを備
えてなり、 前記送信装置には、前記テレビ信号端子に接続されるチ
ューナと、このチューナにより選択されたチャンネルの
テレビ信号を無線送信する送信回路と、無線信号を受け
て前記チューナにチャンネル切換動作をさせるチャンネ
ル切換回路とを備え、 前記受信装置には、前記送信回路から送信されたテレビ
信号を受信して映像信号及び音声信号を生成する受信回
路と、前記送信装置の前記チャンネル切換回路に無線信
号を送るチャンネル切換信号送信回路とを備えたことを
特徴するテレビワイヤレス伝送システム。1. A transmitting device connected to a television signal terminal, and a receiving device receiving radio waves from the transmitting device, wherein the transmitting device includes a tuner connected to the television signal terminal, A transmitting circuit for wirelessly transmitting a television signal of a channel selected by the tuner; and a channel switching circuit for receiving the wireless signal and causing the tuner to perform a channel switching operation. A television wireless transmission system, comprising: a receiving circuit that receives a television signal and generates a video signal and an audio signal; and a channel switching signal transmission circuit that transmits a wireless signal to the channel switching circuit of the transmission device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000351624A JP2002158935A (en) | 2000-11-17 | 2000-11-17 | Television wireless transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000351624A JP2002158935A (en) | 2000-11-17 | 2000-11-17 | Television wireless transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002158935A true JP2002158935A (en) | 2002-05-31 |
Family
ID=18824648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000351624A Pending JP2002158935A (en) | 2000-11-17 | 2000-11-17 | Television wireless transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002158935A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100474270B1 (en) * | 2002-08-16 | 2005-03-10 | 엘지전자 주식회사 | Transmitter and receiver and control method thereof for digital broadcast |
| EP1717995A2 (en) * | 2005-04-18 | 2006-11-02 | Marvell World Trade Ltd. | Wireless audio and video entertainment systems |
| CN100401772C (en) * | 2003-06-26 | 2008-07-09 | 索尼株式会社 | Information processing system ,equipment and method, recording medium and program |
| CN102843553A (en) * | 2012-07-03 | 2012-12-26 | 深圳光启创新技术有限公司 | Satellite television receiving system |
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|---|---|---|---|---|
| JPS61292487A (en) * | 1985-06-20 | 1986-12-23 | Matsushita Electric Ind Co Ltd | Catv device |
| JPH11298817A (en) * | 1998-04-09 | 1999-10-29 | Fujita Corp | Tuner controller for communication satellite broadcast |
| JP2000175110A (en) * | 1998-12-07 | 2000-06-23 | Toshiba Corp | Transmitter, receiver and transmitter-receiver |
-
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- 2000-11-17 JP JP2000351624A patent/JP2002158935A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61292487A (en) * | 1985-06-20 | 1986-12-23 | Matsushita Electric Ind Co Ltd | Catv device |
| JPH11298817A (en) * | 1998-04-09 | 1999-10-29 | Fujita Corp | Tuner controller for communication satellite broadcast |
| JP2000175110A (en) * | 1998-12-07 | 2000-06-23 | Toshiba Corp | Transmitter, receiver and transmitter-receiver |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100474270B1 (en) * | 2002-08-16 | 2005-03-10 | 엘지전자 주식회사 | Transmitter and receiver and control method thereof for digital broadcast |
| CN100401772C (en) * | 2003-06-26 | 2008-07-09 | 索尼株式会社 | Information processing system ,equipment and method, recording medium and program |
| EP1717995A2 (en) * | 2005-04-18 | 2006-11-02 | Marvell World Trade Ltd. | Wireless audio and video entertainment systems |
| EP1717995B1 (en) * | 2005-04-18 | 2015-05-06 | Marvell World Trade Ltd. | Wireless audio and video entertainment systems |
| CN102843553A (en) * | 2012-07-03 | 2012-12-26 | 深圳光启创新技术有限公司 | Satellite television receiving system |
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