JPS62284556A - In-calling incoming display system - Google Patents

Abstract

PURPOSE:To make an incoming display without disordering an image when there is an incoming signal during image communication by providing an image information center with a detecting means for a request signal and a generating means for an incoming display image signal to a picture terminal. CONSTITUTION:When the VCW signal detecting circuit 61 of a terminal device 6 detects a signal VCW, a CWRQ generation instruction circuit 62 sends out a generation instruction for a signal CWRQ to the image terminal 11. The image terminal 11 of a common-use subscriber 1 when receiving the generation instruction for the signal CWRQ generates the CWRQ. which is transmitted to the image center 3a. The CWRQ detecting circuit 31 of the image center 3a when receiving the signal CWRQ operates a CWPIC generating circuit 32 to edit and transmit an incoming display image signal CWPIC to the image terminal 11 in communication. The image terminal 11 receives the signal CWPIC and displays the arrival of an incoming call during calling on the screen. Consequently, when the incoming call is generated during the image communication, the incoming call is displayed on the without disordering the image.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an incoming call display method when an incoming call occurs to a subscriber who is communicating with a Ryōkai information center. .

(Prior art) Figure 2 shows a conventional call waiting display system. In the figure, 1.2% is the subscriber and 3 is the video information center (VCI).
, 4 is a horse subscriber line (LS) exchange, and 5 is a call waiting equipment ff1 (CWE).

The subscriber 1 has an image terminal 11 and a telephone 1fl12, and can receive image communication services from the image information center 3. ) receives an incoming call from a third subscriber, the subscriber (hereinafter referred to as the shared subscriber) who can display this with an intrusive incoming call display tone, etc. and who can also talk to the third subscriber. ).

When the shared subscriber 1 receives an incoming call from the third subscriber 2 during image communication via the image information center 3 and the LS switch 4, a well-known call waiting/call waiting connection is performed, and Neil 1 The incoming call display tone generation circuit 51 of the quaying device 5 sends out the incoming call display tones (signals) ITA and ITB shown in FIG. 3 to the shared subscriber 1.

This signal ITA-ITS is sent within the call waiting device 5 by cutting off the line between the shared subscriber 1 and the image information center 3 with a switch (not shown).

Thereafter, when the shared subscriber 1 responds by hooking or the like, the changeover switch SW in the call queuing device 5
The line is switched to the subscriber 2 side.

(Problem to be solved by the invention) In this way, an incoming call occurs during image communication of shared subscriber 1.
Then, while the signals ITA and ITB are being sent out, the connection between the subscriber 1 and the image information center 3 is disconnected, causing a problem in that the image on the image terminal 11 is distorted.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned problems and provide a method for displaying an incoming call without disturbing the image when an incoming call occurs during image communication.

(Means for Solving the Problems) In order to solve the above problems, the present invention allows one subscriber who is talking to an image information center or another subscriber to receive an incoming call from a third subscriber. In the call-in-waiting display method, a means for generating a call-in-waiting signal comprising a frequency component outside the audio band; and -.

A call waiting device is provided with a means for detecting an incoming call to a subscriber, a filter for blocking the incoming call signal, a means for detecting the incoming call signal, a means for generating an @ call display sound for the telephone, and a filter for blocking the incoming call signal. A means for generating a request signal for an incoming display image signal for the terminal is provided in one subscriber's terminal device, a means for detecting the request signal and a means for creating an incoming display image signal for the image terminal are provided in an image information center, An incoming call from a third subscriber to the one subscriber is detected, and the call waiting signal is inserted into the line of the one subscriber.

(Function) According to the present invention, when a third subscriber receives a call from a third subscriber who is currently talking to the image information center, the call waiting device detects the call, and the call waiting device detects the call. An intermediate call signal is inserted into the line. The incoming call signal is detected by the terminal device and activated, but is cut by a filter and not sent to the image information center or the like. The activated terminal device generates a request signal for a call-in-progress display image signal, and in response to this, the image information center creates a call-in-progress display image signal, sends it to the shared subscriber, and sends it to the image terminal. to be displayed.

(Example) .

FIG. 1 shows an embodiment of the method of the present invention, in which 1
are shared subscribers 1 and 2 are subscribers, 3a is an image information center,
4 is an LS switch, 5a is a call waiting device, 6
is a terminal device, and 7 is a line of shared subscriber 1.

The call waiting device 58 connects the shared subscriber 1 to either the image information center, another subscriber, etc. or a third subscriber, and connects the shared subscriber 1 to the currently called image information center, another subscriber, etc., or a third subscriber. an incoming call extraction circuit 52 that detects an incoming call; a relay RL that operates when the incoming call detection circuit 52 detects an incoming call; and a VCW signal generation circuit connected to the line 7 via a contact r1 of the relay RL. It includes a circuit 53 and a filter 54 inserted into the line 7.

＠Note■ The CW signal generation circuit 53 generates a call reception indication (VCW) signal consisting of frequency components outside the audio band. Also,
The filter 54 has a characteristic of blocking this VCW signal.

The terminal device 6 includes a VCW signal detection circuit 61 that detects the VCW signal, a CWRQ creation command circuit 62 that instructs the image terminal 11 to create a request signal (CWRQ, ) for an incoming display image signal, and an incoming call display & ITA. , and an incoming call display sound generation circuit 63 that generates an ITS.

The image information center 3a detects the signal CWRQ.
WRQ detection circuit 31 and incoming call display image signal (CWPIC)
The CWP IC generating circuit 32 generates a CWP IC generating circuit 32.

FIG. 4 shows the operation when subscriber 2 makes a call to subscriber 1 who is currently communicating with an image. This will be explained below.

When the shared subscriber 1 receives an incoming call from the subscriber 2 during image communication with the image information center 3a, the shared subscriber 11, the image center 3a, and the subscriber 2 are connected to the call waiting device 5a by a known incoming call connection. connected to.

Next, the incoming call extraction circuit 52 detects that the incoming call is to the shared subscriber 1 who is currently talking, and the relay R
When L is activated, its contact rl is turned on and VC is applied to line 7.
A VCW signal is sent from the W signal generation circuit 53. This ■CW signal is transmitted to the shared subscriber 1 side, but the i!CW signal is transmitted through the filter 54. ! ! Image information center 3a
, is not transmitted to the subscriber 2 side.

■The CW signal detection circuit 61 of the terminal device 6 detects the vCW.
When the signal is detected, the CWRQ creation command circuit 62 sends a command to create the signal CWRQ to the image terminal 11. Note that if the shared subscriber 1 is not communicating with the image information center 3a,
That is, when communicating with another subscriber using the R talk Ia 12, the incoming call display sound generation circuit 63 outputs the same incoming call display signal [TA-[TB] to the telephone 112 of the subscriber 1 who shares
Send to.

When the image terminal 11 of the shared subscriber 1 receives the command to generate the signal CWRQ, it generates the signal @CWRQ and transmits it to the image center 3a.

The CWRQ detection circuit 31 of the image center 3a detects the signal CW.
When the RQ is received, the CWP IC generating circuit 32 is operated to edit the incoming display image signal CWPIC and transmit it to the image terminal 11 in communication. The screen and terminal 11 of the shared subscriber 1 receives the signal cwprc and displays on its screen that there is an incoming call. Note that at this time, audio display may also be used.

In this case, by setting the telephone 12 off-hook or the like, the switch SW is changed, and a conversation with the subscriber 2 becomes possible.

Note that in the above embodiment, the terminal device 6 receives the signal CWRQ.
It is also possible to create and send directly to the image information center 3a, but in this case, circuits equivalent to various signal generation circuits (not shown) in the image terminal 11 are required.

(Effects of the Invention) As explained above, according to the present invention, when an incoming call from a third party occurs while a shared subscriber is communicating with the image information center, the image of the shared subscriber is not disturbed. In addition, incoming calls can be displayed on the screen without sending unnecessary signals to the image information center or third subscriber, and the same incoming call display sound as before when communicating with a telephone can be displayed. It has the advantage of being able to send out

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the call waiting display method of the present invention, FIG. 2 is a block diagram showing an example of the conventional call waiting display method, and FIG. 3 is an example of the conventional call display sound. A diagram showing
FIG. 4 is an explanatory diagram showing the incoming call display operation according to the method of the present invention. DESCRIPTION OF SYMBOLS 1... Shared subscriber, 2... Subscriber, 3a... Image information center, 4... Exchange, 5a... Call waiting device, 6... Terminal VR placement, 7... Line . Patent applicant Oki Electric Industry Co., Ltd. Kuchiki Telegraph and Telephone Co., Ltd.

Claims (1)

[Claims] In a call-in-call display method for displaying an incoming call from a third subscriber to a subscriber who is talking to an image information center or another subscriber, the frequency component outside the voice band means for generating a call waiting signal, and means for detecting an incoming call to the one subscriber;
A call waiting device is provided with a filter for blocking the incoming call signal, a means for detecting the incoming call signal, a means for generating an incoming call display sound for the telephone, and a means for generating a request signal for an incoming call display image signal for the visual terminal. and a means for detecting the request signal and a means for creating an incoming display image signal for the image terminal are provided in the image information center, and a signal from a third subscriber to the one subscriber is provided in the image information center. 1. A call waiting display system, characterized in that the incoming call is detected and the incoming call signal is inserted into the line of the subscriber.