JPH0486058A - Video telephone system provided with tv broadcast receiving function - Google Patents

Video telephone system provided with tv broadcast receiving function

Info

Publication number
JPH0486058A
JPH0486058A JP19906090A JP19906090A JPH0486058A JP H0486058 A JPH0486058 A JP H0486058A JP 19906090 A JP19906090 A JP 19906090A JP 19906090 A JP19906090 A JP 19906090A JP H0486058 A JPH0486058 A JP H0486058A
Authority
JP
Japan
Prior art keywords
telephone
image
circuit
receiver
video telephone
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
JP19906090A
Other languages
Japanese (ja)
Inventor
Hideo Tanaka
秀夫 田中
Yoshie Yamaguchi
好江 山口
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP19906090A priority Critical patent/JPH0486058A/en
Publication of JPH0486058A publication Critical patent/JPH0486058A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To utilize a telephone set as a video telephone system automatically when using the telephone set by providing a TV broadcast receiving means and a circuit to detect the state of a telephone line at the general video telephone system. CONSTITUTION:When a call signal comes from an exchange, a call signal detector 7 detects the call signal of 16Hz, and an output signal is transmitted to a picture input switching circuit 9. Then, the circuit 9 is operated and during this operation, a user parallelly executes the operation of picking-up the hand set of a telephone set 2. Then, a speech start state is set up. By operating the picture input switching circuit 9, a contact 9a of the circuit 9 is switched to the state of a dotted line and a receiver is connected through a switch 10 to a picture signal transmission/reception circuit 3. Thus, when originating or terminating a telephone call by using the video telephone system, the receiver is automatically connected to the video telephone system so as to transmit/ receive pictures.

Description

【発明の詳細な説明】 [産業上の利用分野コ 本発明は、テレビ電話装置により電話の送受信を行って
いないときは、TV放送を受信できるようにしたテレビ
電話装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video telephone device that is capable of receiving TV broadcasts when the video telephone device is not transmitting or receiving calls.

[従来の技術] 従来のテレビ電話装置は、電話機に、カメラと画像信号
送受信回路と受像器とからなるテレビ装置を付加して構
成したものである。その使用方法は通常の電話機と同様
に、発信の場合は、ハンドセットを取り上げオフフック
したのち、ダイヤル操作を行い、相手が応答したら、前
記テレビ装置の電源スィッチを投入して待機状態として
おき、通話の状況に応じて必要なときに、画像を送受し
ていた。また、着信の場合は交換機からの呼出信号を聞
いて、ハンドセットを取り上げたのち、前記発信の場合
と同様にテレビ装置の電源スィッチを投入して待機状態
とし、通話が終了するとハンドセットをオンフックして
テレビ装置の電源を切っていた。
[Prior Art] A conventional videophone device is configured by adding a television device consisting of a camera, an image signal transmitting/receiving circuit, and a picture receiver to a telephone. It is used in the same way as a regular telephone; to make a call, pick up the handset, take it off-hook, dial, and when the other party answers, turn on the power switch of the television set and leave it in standby mode. Images were sent and received when necessary depending on the situation. In addition, in the case of an incoming call, after listening to the ringing signal from the exchange and picking up the handset, turn on the power switch of the TV device to put it in standby mode as in the case of the above-mentioned outgoing call, and when the call ends, put the handset on the hook. The television equipment was turned off.

[発明が解決しようとする課題〕 しかしながら、従来のテレビ電話装置は前記のように、
電話機に付加された高価なカメラ、受像器等のテレビ装
置は電話の発・着信時においても、画像を送受信する必
要のある場合以外は使用されず、また電話の発・着信の
ない場合は全く使用されないという問題点があった。
[Problem to be solved by the invention] However, as mentioned above, the conventional videophone device has the following problems:
Expensive cameras, television receivers, and other television equipment attached to telephones are only used when making and receiving calls, except when it is necessary to send and receive images, and are not used at all when no calls are being made or received. The problem was that it was not used.

本発明は上記の問題点を除き、テレビ電話装置を使用し
ていないときには、前記受像器により一般のTV放送が
受信できるようにして、該受像器の利用時間を拡大して
、テレビ電話装置利用者の利便を図った装置を提供する
ことを目的とする。
The present invention eliminates the above-mentioned problems by allowing the receiver to receive general TV broadcasts when the videophone device is not in use, thereby extending the usage time of the videophone device. The purpose is to provide a device that is convenient for people.

[課題を解決するための手段] 本発明は、従来のテレビ電話装置に、該装置が接続され
る電話回線のループ形成状態を検出する回線ループ検出
回路と、交換機からの呼出信号を検出する呼出信号検出
回路と、回線の極性を検出する極性検出回路と、前記3
つの検出回路のそれぞれの検出出力に対応して作動し、
前記受像器へ入力する画像信号を切替える画像入力切替
手段と、前記テレビ電話装置の画像信号送受信手段より
の画像を受像器へ表示するモードを選択するスイッチと
、TV放送受信手段とを設けて構成し、前記電話回線を
介してテレビ電話装置からの発信時または該装置への着
信時には、前記画像入力切替手段により、前記受像器を
テレビ電話装置へ接続し、発・着信のないときは前記受
像器をTV放送受信手段に接続するようにしたものであ
る。
[Means for Solving the Problems] The present invention provides a conventional videophone device with a line loop detection circuit that detects a loop formation state of a telephone line to which the device is connected, and a calling device that detects a calling signal from an exchange. a signal detection circuit; a polarity detection circuit that detects the polarity of the line;
It operates in response to the detection output of each of the two detection circuits,
An image input switching means for switching an image signal input to the image receiver, a switch for selecting a mode for displaying an image from the image signal transmitting/receiving means of the video telephone device on the image receiver, and a TV broadcast receiving means. When an outgoing call is made from the video phone device or a call is received to the device via the telephone line, the image input switching means connects the image receiver to the video phone device, and when there is no outgoing or incoming call, the image input switching means connects the image receiver to the video phone device. The receiver is connected to TV broadcast receiving means.

[作用] 本発明は、前記のように構成したので、テレビ電話装置
を用いた電話の発信時または貴信時には受像器を自動的
に、該テレビ電話装置に接続して、画像の送受信を行う
ことができるとともに、電話の発・着信のない時には、
受像器を、自動的に、前記TV放送受信回路に接続して
一般のTV放送を受信することができるのである。
[Function] Since the present invention is configured as described above, when making a call or receiving a call using the videophone device, the receiver is automatically connected to the videophone device to transmit and receive images. and when there are no calls being made or received,
The receiver can be automatically connected to the TV broadcast receiving circuit to receive general TV broadcasts.

[実施例コ 第1図は本発明の一実施例のブロック図である。[Example code] FIG. 1 is a block diagram of one embodiment of the present invention.

第1図において、1は電話回線、2は)\ンドセット、
ベル通話回路等からなる電話機、3はテレビ電話装置の
画像信号の送受信を行う画像信号送受回路、4はテレビ
電話装置のカメラ、5は受像器、6はホトカップラなど
から成る電話回線1の直流ループを検出するための回線
ループ検出器、7は交換機(図示せず)からの呼出信号
(16Hzの信号)を検出するための呼出信号検出器、
8は通話が終了したときの極性(待機時の状態に戻る)
例えば−48V(電話回線は待機時−48V、通話時/
発信時−5V@信呼び出し時+48V等極性並びに電位
が変わる)を検出する極性検出回路、9は回線ループ検
出器6あるいは呼び出し信号検出器7が動作したとき、
TV放送受信に使用していた受像器をテレビ電話装置に
切り換える画像入力切替回路、9aは該切替回路9のリ
レーなどからなる接点、10はカメラ4で撮像した画像
を、モニタしながら画像送受回路3を介して相手に送る
か(図中点線)、前記画像をモニタせずに相手に送るか
(図中−点破線)、こちらのモニタのみ(図中実線)に
するかを選択するスイッチ、]1はTV放送受信用のT
Vアンテナ、12はTV放送受信用のチューナ等から成
るTV放送受信回路、13はスピーカである。
In Fig. 1, 1 is a telephone line, 2 is a )\ndset,
3 is an image signal transmitting/receiving circuit for transmitting and receiving image signals of the video telephone device; 4 is a camera of the video telephone device; 5 is a receiver; 6 is a DC loop of a telephone line 1 consisting of a photocoupler, etc. 7 is a ringing signal detector for detecting a ringing signal (16Hz signal) from an exchange (not shown);
8 is the polarity when the call ends (returns to standby state)
For example -48V (telephone line -48V when on standby, when talking/
A polarity detection circuit that detects -5V at the time of transmission @ +48V at the time of call, and the polarity and potential change), 9 is a polarity detection circuit that detects when the line loop detector 6 or the call signal detector 7 is activated,
An image input switching circuit that switches the image receiver used for receiving TV broadcasts to a video telephone device, 9a is a contact made of a relay of the switching circuit 9, and 10 is an image transmission/reception circuit that monitors the image captured by the camera 4. A switch for selecting whether to send the image to the other party via 3 (dotted line in the figure), to send the image to the other party without monitoring it (dotted line in the figure), or to only monitor this image (solid line in the figure); ]1 is T for TV broadcast reception
12 is a TV broadcast receiving circuit including a tuner for receiving TV broadcasts, and 13 is a speaker.

第1図について本発明の詳細な説明する。The invention will now be described in detail with reference to FIG.

まず、TV放送受信用として使用する場合は一般的に普
及しているTV受像機の扱いと同様に電源スィッチを入
れると接点9aは図中実線で示す状態になっているので
、チャンチルを選択(図示せず)してTV放送を受信す
ることができる。
First, when using it for receiving TV broadcasts, when you turn on the power switch, the contact 9a will be in the state shown by the solid line in the figure, so select Channel ( (not shown) to receive TV broadcasts.

つぎに、テレビ電話装置として使用するとき、着信モー
ドの場合、交換機より呼出信号が到来すると呼出信号検
出器7が16Hzの呼び出し信号を検出する。その出力
信号は画像入力切替回路9に送られ該回路9が動作する
。この間に利用者は電話機2のハンドセットをあげる動
作が平行して行われ通話開始状態となる。前記画像入力
切替回路9の作動によって該回路9の接点9aは第1図
に示すように点線の状態に切替わる。これにより、受像
器はスイッチ10を介して、画像信号送受回路3に接続
される。以降は一般のテレビ電話装置と同様の動作を行
いスイッチ10によりモニタせずに相手のみに画面を送
るか、モニタしながら相手に画面を送るか、モニタのみ
とするかを選択し通話を行う。
Next, when used as a video telephone device, in the incoming call mode, when a calling signal arrives from the exchange, the calling signal detector 7 detects the 16 Hz calling signal. The output signal is sent to the image input switching circuit 9, and the circuit 9 operates. During this time, the user simultaneously lifts up the handset of the telephone 2 and enters the call start state. By the operation of the image input switching circuit 9, the contact 9a of the circuit 9 is switched to the state shown by the dotted line as shown in FIG. Thereby, the image receiver is connected to the image signal transmission/reception circuit 3 via the switch 10. Thereafter, the operation is similar to that of a general video telephone device, and the call is made by selecting with the switch 10 whether to send the screen to the other party only without monitoring, to send the screen to the other party while monitoring, or to only monitor.

通話が終了すると、電話機2のハンドセットがオンフッ
クされるので、電話回線1の極性が再び待機時(例えば
−48v)の状態にもどる。極性検出回路8は極性が復
帰したことを検出し、その出力を画像入力切替回路9へ
送出する。該切替回路9はこの信号を受けて復旧し、接
点9aを初期状態に(図中実線)に戻す。これによって
、再びV V送受信モードとなる。
When the call ends, the handset of telephone 2 is put on hook, and the polarity of telephone line 1 returns to the standby state (for example, -48V). The polarity detection circuit 8 detects that the polarity has been restored, and sends its output to the image input switching circuit 9. The switching circuit 9 receives this signal and recovers, returning the contact 9a to its initial state (solid line in the figure). This causes the device to enter the VV transmission/reception mode again.

次に発信モードについて説明する。TV放送を受信して
いる時に発信する場合は、そのままで電話機2のハンド
セットを上げる(オフフックする)。ハンドセットを上
げることにより、電話回線1は電話機2によって終端さ
れるため直流ループが形成される。回線ループ検出器6
はこの直流ループを検出し、その出力を画像入力切替回
路9に送出する。該切替回路9はこの信号を受けて動作
し、接点9aを図中点線で示す状態とする。
Next, the transmission mode will be explained. If you want to make a call while receiving a TV broadcast, keep the handset of telephone 2 up (go off-hook). By raising the handset, the telephone line 1 is terminated by the telephone set 2 so that a DC loop is formed. Line loop detector 6
detects this DC loop and sends its output to the image input switching circuit 9. The switching circuit 9 operates upon receiving this signal, and brings the contact 9a into the state shown by the dotted line in the figure.

以降は着信時と同様の動作を行い、通話が終了するとT
V放送受信モードとなる。
From then on, the same operation as when receiving a call is performed, and when the call ends, T
It becomes V broadcast reception mode.

[発明の効果] 以上、詳細に説明したように、本発明は一般のテレビ電
話装置にTV放送受信手段と、ri電話回線状態を検出
する回路ηを設けることにより電話使用時には、自動的
にテレビ電話装置となり、電話を利用していないときは
一般のTV放送受像機となるのでテレビ電話装置の利用
時間が拡大されるという効果が期待できる。
[Effects of the Invention] As described above in detail, the present invention provides a general videophone device with a TV broadcast receiving means and a circuit η for detecting the RI telephone line state, so that when using the telephone, the TV is automatically switched on. It becomes a telephone device, and when the telephone is not in use, it becomes a general TV broadcast receiver, so the effect of extending the usage time of the videophone device can be expected.

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

第1図は本発明の一実施例のブロック図である。 1・・・電話回線、2・・・電話機、3・・・画像信号
送受回路、4・・・カメラ、5・・・受像器、6・・・
回線ループ検出回路、7・・・呼出信号検出回路、8・
・・極性検出回路、9・・・画像入力切替回路、9a・
・・接点、10・・・スイッチ、11・・・TVアンテ
ナ、12・・・TV放送受信回路、13・・・スピーカ
FIG. 1 is a block diagram of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Telephone line, 2... Telephone, 3... Image signal transmission/reception circuit, 4... Camera, 5... Image receiver, 6...
Line loop detection circuit, 7... Calling signal detection circuit, 8.
...Polarity detection circuit, 9...Image input switching circuit, 9a.
...Contact, 10...Switch, 11...TV antenna, 12...TV broadcast receiving circuit, 13...Speaker.

Claims (1)

【特許請求の範囲】[Claims] 1、電話機と、画像信号を出力するカメラと、通話者相
互の画像信号の送受信を制御する画像信号送受信手段と
、該画像信号を表示する受像器とにより構成されるテレ
ビ電話装置であって、前記装置が接続される電話回線の
ループ形成状態を検出する回線ループ検出回路と、交換
機からの呼出信号を検出する呼出信号検出回路と、回線
の極性を検出する極性検出回路と、前記3つの検出回路
のそれぞれの検出出力に対応して作動し、前記受像器へ
入力する画像信号を切替える画像入力切替手段と、前記
画像信号送受信手段よりの画像を受像器へ表示するモー
ドを選択するスイッチと、TV放送受信手段とを設けて
構成したTV放送受信機能付テレビ電話装置。
1. A videophone device consisting of a telephone, a camera that outputs an image signal, an image signal transmitting and receiving means that controls transmission and reception of image signals between callers, and a receiver that displays the image signal, a line loop detection circuit that detects a loop formation state of a telephone line to which the device is connected; a ringing signal detection circuit that detects a ringing signal from an exchange; a polarity detection circuit that detects the polarity of the line; an image input switching means that operates in response to each detection output of the circuit and switches an image signal input to the image receiver; a switch that selects a mode for displaying the image from the image signal transmitting/receiving means on the image receiver; A video telephone device with a TV broadcast receiving function is provided with a TV broadcast receiving means.
JP19906090A 1990-07-30 1990-07-30 Video telephone system provided with tv broadcast receiving function Pending JPH0486058A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19906090A JPH0486058A (en) 1990-07-30 1990-07-30 Video telephone system provided with tv broadcast receiving function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19906090A JPH0486058A (en) 1990-07-30 1990-07-30 Video telephone system provided with tv broadcast receiving function

Publications (1)

Publication Number Publication Date
JPH0486058A true JPH0486058A (en) 1992-03-18

Family

ID=16401442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19906090A Pending JPH0486058A (en) 1990-07-30 1990-07-30 Video telephone system provided with tv broadcast receiving function

Country Status (1)

Country Link
JP (1) JPH0486058A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006174093A (en) * 2004-12-16 2006-06-29 Sanyo Electric Co Ltd Communication method and apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006174093A (en) * 2004-12-16 2006-06-29 Sanyo Electric Co Ltd Communication method and apparatus
JP4651374B2 (en) * 2004-12-16 2011-03-16 京セラ株式会社 Communication method and apparatus

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