JPH089352A - Videophone - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a videophone capable of making a call even when the other terminal is busy. [Structure] Operation unit 6 for inputting the dialed number of the partner terminal
The dial number of the partner terminal input from is stored in the partner terminal dial number storage unit 4, and the dial number of the telephone owned by the same user as the partner terminal having the dial number stored in the partner terminal dial number storage unit 4 is stored. When the CPU 1 detects the busy state of the partner terminal stored in the telephone dial number storage unit 5 and makes a call to the partner terminal having the dial number stored in the partner terminal dial number storage unit 4, the partner terminal is used by the CPU 1. When it is detected that the terminal is in a busy state, the CP is set to switch to a telephone owned by the same user as the other terminal stored in the telephone dial number storage unit 5 to make a call.
The line is controlled by U1.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to videophones.

[0002]

2. Description of the Related Art In recent years, communication technology has been remarkably developed, and communication data such as texts, voices, graphics, and animations have become multimedia, and in communication terminals,
With the spread of ISDN (Integrated Services Digital Network),
Videophones that handle moving images as communication data are beginning to appear on the market.

[0003]

However, since the conventional videophone described above is expensive,
Currently, only one office machine is installed in a specific department in a company. Therefore, it is frequently used, and even when a call is made from another terminal, it is often in a busy state, and since it is disconnected without accepting an incoming call, there is often a problem that communication cannot be performed.

The present invention has been made in view of the above problems of the above-mentioned conventional technique, and its object is to solve the problem that a call cannot be made when the partner terminal is busy. It is intended to provide a videophone.

[0005]

In order to achieve the above object, the video telephone of the present invention is a dial number input means for inputting a dial number of a partner terminal and a dial number storage of a partner terminal for storing a dial number of the partner terminal. Means, a telephone dial number storage means for storing a dial number of a telephone owned by the same user as the other terminal having the dial number stored in the other terminal dial number storage means, and a busy state for detecting a busy state of the other terminal The detecting means and the telephone when the busy state detecting means detects that the other terminal is busy when making a call to the other terminal having the dial number stored by the other terminal dial number storing means. Switch to the telephone owned by the same user as the other terminal stored in the dial number storage means to make a call. It is characterized in that it has and a circuit control means for controlling.

Further, in order to achieve the same object, the dial number input means is an operation unit having a keyboard, the partner terminal dial number storage means is RAM, and the telephone dial number storage means is , RAM, the busy state detection means is a CPU, and the line control means is a CPU.

[0007]

The dial number of the partner terminal input from the dial number input means for inputting the dial number of the partner terminal is stored in the partner terminal dial number storage means, and has the dial number stored in the partner terminal dial number storage means. The telephone dial number of the same user as the other terminal is stored by the telephone dial number storage means, and the busy state of the other terminal is detected by the busy state detection means,
The telephone dial number storage means is provided when the busy state detection means detects that the partner terminal is busy when a call is made to the partner terminal having the dial number stored by the partner terminal dial number storage means. The line control means controls the line so as to switch to a telephone owned by the same user as the other terminal stored in the line and make a call. As a result, a call can be made even when the partner terminal is busy.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the structure of a videophone according to an embodiment of the present invention.
Assume that it is connected to the N line. In the figure, 1 is a CPU
The central processing unit controls the entire videophone. 2 is a ROM (read-only memory),
A control program for controlling the busy state detecting means, the line control means, and other whole videophones according to the present invention is stored. Reference numeral 3 denotes a RAM (readable / writable memory), which is a partner terminal dial number storage unit (partner terminal dial number storage means) for storing the dial number of the partner terminal 4
And a telephone dial number storage unit (telephone dial number storage means) 5 for storing the dial number of the telephone owned by the same user as the terminal having the dial number stored in the dial number storage unit 4 of the other terminal. It is used as a storage area and a work area of the CPU 1.

An operation unit 6 has a keyboard used for inputting control information and other data for controlling the present videophone. 7 is a voice input / output section,
It has a handset, a microphone, a speaker and the like as output means, and performs analog / digital conversion processing and digital / analog conversion processing of a voice signal.
A voice encoding / decoding unit 8 encodes and receives a transmission voice signal in accordance with a voice encoding / decoding algorithm defined in ITU-T (International Telecommunication Union; former CCITT) Recommendation G series. The audio signal is decoded. An image input / output unit 9 has an image display unit such as a CRT (cathode ray tube) monitor which is an image input / output unit and an image photographing unit such as a camera, and performs analog / digital conversion processing and digital / analog of image signals. The conversion process is performed. Reference numeral 10 is an image encoding / decoding unit, which is an IT
UT Recommendation H.264. According to the image signal encoding / decoding algorithm defined by H.261, the transmission image signal encoding process and the reception image signal decoding process are performed.

Reference numeral 11 is a multiplexing / separating unit, which is recommended by ITU-T H.264. In accordance with 221, the audio signal from the audio encoding / decoding unit 8, the image signal from the image encoding / decoding unit 10, and various data signals input via the channel interface 13 are used for the current communication capability and communication mode. In accordance with the above, multiplexing processing for multiplexing in transmission frame units and separation of received frames into respective media of constituent units are notified to the audio encoding / decoding unit 8, image encoding / decoding unit 10, and channel interface 13. Separation processing is performed. 1
2 is a line interface, connected to ISDN, IS
The line is controlled according to the DN user / network interface. A channel interface 13 is an interface for connecting an external device such as a personal computer.

FIG. 2 is a sequence diagram showing an example of a communication procedure of the present videophone shown in FIG. 1, showing a sequence when the transmitting side terminal X makes a call to the receiving side terminal Y in a busy state. There is. Incidentally, in FIG.
It is assumed that the telephone dial number storage unit 5 existing on the AM 3 stores the telephone dial number of the user of the receiving terminal Y in advance.

In FIG. 2, at P200, a "call setup" message (SETUP) is notified from the terminal X to the network in accordance with the ISDN user / network interface. P
In 201, the network which has received “SETUP” detects that the terminal Y is in communication (busy state), and transmits a “release” message (REL) to the terminal X. Further, the busy state detecting means of the terminal X detects that the terminal Y is in the busy state by the busy code of the reason display (CAUSE) of the "REL". In P202, the P20
A "release completion" message (RELCOMP) is returned to the "REL" received in step 1, the communication is once terminated, and the telephone dial number storage unit 5 existing on the RAM 3 is returned.
At the same time, a telephone (TE
The dial number of L) is detected.

In P203, the transmission mode is changed from unrestricted digital to 3.1 kilo-audio, and a call is made to the telephone having the dial number stored in the telephone dial number storage unit 5, and the terminal X again returns "SETUP". Are sent to the TEL over the network. In P204, from the network "SETU
"CALL PRO" to notify that "P" has been accepted
C ”is notified to the terminal X. In P205, TE
A "call" message (ARERT), which is a trigger for generating a ring tone, is notified from terminal L to terminal X via the network. In P206, the "response" message (CON) meaning that the receiving side TEL has accepted the incoming call.
N) is sent to the terminal X via the network. In P207,
A “response confirmation” message (CONN ACK), which is a response of “CONN”, is sent from the terminal X via the network to TEL.
Sent to In P208, the call between the terminal X and the telephone (TEL) is started through the above sequence.

FIG. 3 is a flow chart showing the operation of the videophone of this embodiment when making a call. In the figure, first, in step S300, "SETUP" in P200 of FIG. 2 is transmitted to perform call setting. Next, in step S301, a signal from the network is received and it is determined whether the partner terminal is busy. Here, if the partner terminal is not in the busy state, the process proceeds to step S310, and after the normal communication procedure is performed, this processing operation is ended. If the partner terminal is busy in step S301, the process proceeds to step S302 and the call release procedure is performed.

Next, in step S303, the RAM 3
The telephone dial number storage unit 5 existing above is referred to. Next, the process proceeds to step S304, and the step S30 is performed.
It is judged whether or not the telephone dial number of the same user as the partner terminal whose busy state has been detected in step S301 is registered in the telephone dial number storage unit 5 referred to in step S301. Here, if the dial number of the telephone owned by the same user as the partner terminal in which the busy state is detected is not registered, this processing operation is terminated without any processing, and if it is registered, It proceeds to step S305. In step S305, the communication mode for making a call to the telephone is switched from the unrestricted digital mode to 3.1 kiloaudio. Next, in step S306, the telephone is called, and in the next step S307, a call setup procedure for the telephone is performed. Next, the process proceeds to step S308, the call is started, the call is ended in the next step S309, the call release procedure is performed, and then this processing operation is ended.

According to the above-described embodiment, the busy state detecting means detects that the other terminal is busy when the other terminal is simply disconnected in the conventional videophone and the other terminal is busy. If the telephone number of the same user is stored, the telephone dial number storage means 5 is referred to. It becomes possible to make a call, and it has become possible to solve the problem that a call cannot be made when the other terminal is busy.

The telephone in the above embodiment is ISDN.
Although a telephone connected to a line is assumed, a telephone connected to a PSTN (public telephone network) can be handled with the same functional configuration.

[0018]

As described in detail above, according to the video telephone of the present invention, the dial number of the partner terminal input from the dial number input means for inputting the dial number of the partner terminal is stored by the partner terminal dial number storage means. The dial number of the telephone having the same user as the partner terminal having the dial number stored in the partner terminal dial number storage means is stored by the telephone dial number storage means, and the busy state of the partner terminal is stored by the busy state detection means. If the busy state detection means detects that the other terminal is busy when a call is made to the other terminal having the dial number stored by the other terminal dial number storage means, the telephone dialing is performed. Make a call by switching to the telephone owned by the same user as the other terminal stored in the number storage means Since the line is controlled by the Uni line control unit, an effect that it is the communication partner terminal even when busy.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a videophone according to an embodiment of the present invention.

FIG. 2 is a sequence diagram showing an example of a communication procedure of the videophone.

FIG. 3 is a flowchart showing an operation when the videophone is called.

[Explanation of symbols]

1 CPU (busy state detection means, line control means) 4 partner terminal dial number storage section (partner terminal dial number storage means) 5 telephone dial number storage section (telephone dial number storage means) 6 operation section (destination terminal dial number input means) )

Claims (6)

[Claims] 1. A dial number input means for inputting a dial number of a partner terminal, a partner terminal dial number storage means for storing a dial number of the partner terminal, and a dial number stored in the partner terminal dial number storage means. A telephone dial number storage means for storing a dial number of a telephone owned by the same user as the other terminal, a busy state detection means for detecting a busy state of the other terminal, and a dial number stored by the other terminal dial number storage means. When the busy state detecting means detects that the other terminal is busy when making a call to the other terminal, the same telephone as the other terminal stored in the telephone dial number storage means is used by the same user. A videophone comprising a line control means for controlling the line so as to switch and make a call. . 2. The videophone according to claim 1, wherein the dial number input means is an operation unit having a keyboard. 3. The partner terminal dial number storage means,
The videophone according to claim 1, which is a RAM. 4. The telephone dial number storage means is RA
The videophone according to claim 1, wherein the videophone is M. 5. The videophone according to claim 1, wherein the busy state detecting means is a CPU. 6. The videophone according to claim 1, wherein the line control means is a CPU.