JPH0738673A - Multi-medium communication equipment - Google Patents

Abstract

PURPOSE:To obtain a multi-medium communication equipment in which the communication state equipment moving service is utilized even during communication using plural information (B) channels. CONSTITUTION:In the case of multi-medium communication by using two B channels, when an interrupt/restart button 13a is depressed, a system control section 14 generates an additional channel call identification 2 and a line interface section 16 conducts the interruption of the additional channel. Then the system control section 14 generates 1st channel use call identification 1 and the line interface section 16 conducts the interruption of an additional channel. When restarted and the interrupt/restart button 13a is depressed, the system control section 14 generates the 1st channel use call identification 1 and the line interface section 16 conducts restart of the 1st channel. Then the system control section 14 generates additional channel call identification 2 and the line interface section 16 conducts restart of the additional channel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia communication device for performing communication using a plurality of information (B) channels, and more particularly to a process of suspending and resuming a plurality of information (B) channels.

[0002]

2. Description of the Related Art In recent years, communication services using ISDN (Integrated Services Digital Network) have been put to practical use, and AV (Audio) using digital lines such as ISDN has been put to practical use.
Visual) services have been attracting attention, and multimedia communication devices such as various video telephone devices and video conference systems are becoming popular. In a multimedia communication device that communicates various media such as images, voices, and data, since communication is performed using a plurality of information (B) channels, high-speed and high-quality communication can be realized.

The service specification, protocol specification, and multimedia multiplexing frame structure specification for this AV service are described in CCITT Recommendation H.264. 320, H.M. 242, H.H.
221 and the like. In this recommendation, D (Signal)
After setting up the end-to-end connection by the channel and establishing the reception synchronization using the FAS (frame synchronization signal) of the B channel, the exchange sequence of the terminal capability using the BAS (bit rate allocation signal) of the B channel,
A method for communicating various media such as images, voices, and data between terminals is defined by procedures such as a communication mode switching sequence.

By the way, as one of the additional services of ISDN, a device during communication communication service is known. In this service, the terminal performs a suspend / resume procedure during communication, so that the user can move the location of the terminal and replace it with another connector on the same line, or change the terminal used for communication to another on the same line. You can switch to the terminal. Further, in the suspending / resuming procedure, it is possible to suspend / resume a plurality of communications by using information called call identification.

[0005]

However, in such a multimedia communication device, since a plurality of different call identification information corresponding to a plurality of information (B) channels are not generated, a plurality of information (B) channels are not transmitted. There is a problem that the suspending / resuming procedure cannot be executed when communication is performed by using the device, and thus the device movement service during communication cannot be used.

Further, when the service for moving the in-communication device is executed, the suspended multimedia communication apparatus cannot receive the voice and the image, so that noise is generated in the voice on the speaker or the handset. There is a problem that the image on the display is disturbed. Further, since the FAS is not received by the suspended other party's multimedia communication device, there is a problem that reception synchronization is lost.

The present invention has been made in view of the above conventional problems. A first object of the present invention is to utilize the in-communication device movement service even during communication using a plurality of information (B) channels. It is to provide a multimedia communication device.

A second object of the present invention is to provide a multimedia communication apparatus capable of preventing noise from occurring in received voice and loss of reception synchronization when communication is interrupted.

A third object is to provide a multimedia communication device capable of preventing the received image from being disturbed when the communication is interrupted.

[0010]

In order to achieve the above-mentioned first object, the first invention is such that when interruption or resumption is instructed for multimedia communication using a plurality of information channels. , Generating means for generating call identification information for each of a plurality of information channels related to use, and for each information channel by using the call identification information generated by the generating means when the interruption of multimedia communication is instructed When the interruption execution means for executing the interruption and the restart of the multimedia communication interrupted by the interruption execution means are instructed, the restart is executed for each information channel by using the call identification information generated by the generation means. And a re-execution executing means.

In order to achieve the above-mentioned first object, a second invention is to use a plurality of information channels related to use when an interruption is instructed to multimedia communication using a plurality of information channels. Interruption executing means for executing interruption for each information channel by using different call identification information for each, and transmission means for transmitting the call identification information for each information channel used at the time of interruption execution by the interruption executing means And a receiving means for receiving the call identification information transmitted by the transmitting means,
And a restart executing means for executing restart for each information channel using the call identification information received by the receiving means when the restart of the multimedia communication interrupted by the interrupt executing means is instructed. .

In order to achieve the above-mentioned second object, a third invention is a multimedia communication device for performing multimedia communication with respect to various media such as images, voices, data, etc., and interruption of communication made by a communication partner side. It includes a detecting means for detecting and a changing means for changing the voice receiving mode and the receiving frame structure when the interruption of the communication is detected by the detecting means.

In order to achieve the above-mentioned third object, a fourth invention is a multimedia communication apparatus for performing multimedia communication with respect to various media such as images, voices, data, etc., in which interruption of communication made by a communication partner side is interrupted. The detection means for detecting and the changing means for changing the image receiving mode when the interruption of communication is detected by the detecting means.

[0014]

According to the first aspect of the invention, when communication is interrupted and restarted during communication using a plurality of information channels, call identification information is generated for each information channel, and this call identification information is used for interrupting and restarting each information channel. Since the process is executed, the in-communication device movement service can be used even during communication using a plurality of information (B) channels.

In the second aspect of the invention, when communication is interrupted and restarted during communication using a plurality of information channels, call identification information is generated for each information channel and notified to the resuming side terminal, and the resuming side terminal makes this call. Since the restart is executed for each information channel based on the identification information, it is possible to use the in-communication device movement service even during communication using a plurality of information (B) channels.

According to the third aspect of the invention, since the voice reception mode and the reception frame structure are changed when the interruption of the communication is detected, it is possible to prevent noise from being generated in the reception voice when the communication is interrupted. In addition, it is possible to prevent the reception synchronization from being lost.

According to the fourth aspect of the invention, since the image reception mode is changed when the interruption of the communication is detected, it is possible to prevent the received image on the display from being disturbed when the communication is interrupted.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 shows the first to third embodiments of the present invention.
FIG. 3 is a block diagram showing a schematic configuration of a multimedia communication device according to an embodiment, FIG. 2 is an explanatory diagram showing a communication sequence of a suspending / resuming procedure in the first embodiment when using a device movement service during communication, and FIG. FIG. 4 is a flowchart showing the suspending process in the first embodiment, and FIG. 4 is a flowchart showing the restarting process in the first embodiment.

As shown in the upper part of FIG. 1, the handset 1 which is an audio input / output unit, the microphone 2 and the speaker 3 are connected to the voice interface unit 4, and the voice interface unit 4 controls the system control unit 14. In order to erase the echo when the microphone 2 and the speaker 3 are used, a switching process for switching the handset 1, the microphone 2 and the speaker 3 below, an on / off hook detection process for detecting whether the handset 1 is in the on-hook state or the off-hook state. Echo cancellation processing, and tone generation processing such as dial tone, ring tone, busy tone, ring tone, and hold tone.

A voice encoding / decoding unit 5 is connected to the voice interface unit 4, and the voice encoding / decoding unit 5 is controlled by the system control unit 14 to obtain a 64 kbps PCM A-law,
64kbps PCM μ-law, 64kbps / 56kbps / 48
kbps SB-ADPCM (7 kHz audio), 32
kbps SB-ADPCM, 16 kbps (eg APC-A
B), the transmission voice signal is encoded according to the encoding and decoding algorithm of the voice signal such as 8 kbps APC-AB, and the reception voice signal is also decoded.

Further, as shown in the middle part of FIG. 1, a camera 6 for inputting a self-portrait as an image input / output means,
A document camera 7 for inputting a picture, a drawing, etc., and a display unit 8 for displaying an input image from the camera 6, the document camera 7, a received image from the other party, an operation screen, etc. are provided in the video interface unit 9. It is connected. Under the control of the system control unit 14, the video interface unit 9 performs an input switching process of the camera 6 and the document camera 7, a display switching process of the input image, the received image, an operation screen and the like, and the image of the display unit 8. Image signal composition processing for split display on the screen is performed, and in particular, freeze processing of the received image is performed at the time of interruption as described later.

A video encoding / decoding unit 10 is connected to the video interface unit 9, and the video encoding / decoding unit 10 is connected.
CCITT Recommendation H.264. According to H.261, the transmission image is encoded and the reception image is decoded. The video interface unit 9 also stops image reception at the time of interruption under the control of the system control unit 14.

The data terminal 11 shown in the lower part of FIG. 1 is used for data communication of code data and the like, and is connected to the data interface section 12. The data interface unit 12 includes the data terminal 11 and the system control unit 1.
4 sends data to the demultiplexing unit 15, and receives data from the demultiplexing unit 15 to the data terminal 1.
1 or to the system control unit 14. The operation unit 13 is used as an input unit of control information for performing overall control of the apparatus, and particularly has a suspend / resume button 13a.
The operation unit 13 is composed of, for example, a keyboard or a touch panel.

The audio interface unit 4, the audio encoding / decoding unit 5, the video interface unit 9, the video encoding / decoding unit 10, and the data interface unit 12
The operation unit 13 and the demultiplexing unit 15 are connected to the system control unit 14 via control lines. The system control unit 14 includes a CPU (central processing unit), a ROM (read only memory), and a RAM (random access memory).
It is equipped with an auxiliary storage device and the like, and monitors the states of the above respective parts to control the entire device, and in particular, creates an operation / display screen and executes applications according to the control state of the entire device.

A demultiplexing unit 15 is connected to the audio encoding / decoding unit 5, the video encoding / decoding unit 10, the system control unit 14 and the data interface unit 12 via a data line, and the multiplexing is performed. The separation unit 15 is a CCITT recommendation H.264. 221, a transmission audio signal from the audio encoding / decoding unit 5, a transmission image signal from the video encoding / decoding unit 10, transmission data from the data interface unit 12, transmission data from the system control unit 14, And C
CITT Recommendation H.264 221, H.221. 242 FAS, BAS
Control information such as a transmission frame unit is multiplexed, and a reception frame is separated into the above-mentioned media, and the audio coding / decoding unit 5, the video coding / decoding unit 10, the data interface unit 12, and the system control are respectively performed. It is sent to the section 14. A line interface unit 16 is connected to the demultiplexing unit 15, and the line interface unit 16 controls the ISDN line according to the ISDN user / network interface. FIG. 2 shows a terminal X and a terminal Z in the multimedia communication device (hereinafter, referred to as a terminal) X, Y, Z having the above configuration.
The sequence in the case where the terminal X suspends and the terminal Y resumes communication performed using two B channels between and is shown. In this embodiment,
When interrupting during multimedia communication using two B channels, the first channel set first is interrupted before the additional channel set second is interrupted. Hereinafter, the suspending / resuming process in the first embodiment will be described with reference to FIGS.

First, the interruption processing will be described. As shown in procedure P201 shown in FIG. 2, two Bs are connected between the terminal X and the terminal Z.
When multimedia communication is performed using the channel, these terminals X and Y are interrupted as shown in FIG.
The depression of the restart button 13a is monitored (step S3).
01 → S302 → S301). Then, when the suspend / resume button 13a is pressed, the process proceeds from step S302 to step S303, and the system control unit 14 causes the additional channel call identification 2 (for example, "CH" in the IA5 character).
2 ") is generated.

In the example of FIG. 2, since the terminal X executes the interruption, the terminal X proceeds to step S303 and the subsequent steps, but the terminal Z repeats steps S301 and S302.

Next, in step S304, the line interface unit 16 suspends the additional channel as shown in procedure P202. In this procedure P202, specifically, as shown in FIG.
Is the call identification for the additional channel on the D channel to the network 2
And the network notifies this message to the terminal Z to be suspended (NOT).
IFY) [SUSP], and also sends a suspend confirmation message (SUSP ACK) to the suspending terminal X.

Next, in step S305, the system control unit 14 generates the call identification 1 for the first channel (for example, "CH1" in the IA5 character), and in the following step S306, the line interface unit 16 indicates the procedure P203. Thus, the interruption of the first channel is executed and the processing ends. In procedure P203, as shown in FIG. 2, the line interface unit 16 instructs the network to terminate the interruption message (SU) including the call identification 1 for the first channel on the D channel.
SP), the network notifies the suspended terminal Z of this message (NOTIFY) [SUSP], and the suspended terminal X receives a suspension confirmation message (SUS).
PACK) is transmitted. Then, the suspending terminal X receives the suspend confirmation message (SUSP ACK) from the network.

When restarting the two B-channel communication interrupted in this way, the channels are restarted in the reverse order of the interrupt process. That is, the additional channel is restarted after the first channel is restarted. Note that this restart processing is performed in each terminal according to the flowchart in FIG. 4, but here, an example in which the restart is performed in terminal Y as shown in FIG. 2 will be described.

The resuming terminal Y monitors the pressing of the suspend / resume button 13a as shown in FIG. 4 (step S401).
(→ S402 → S401), when the suspend / resume button 13a is pressed, the process proceeds from step S402 to step S403, and the system controller 14 generates the call identification 1 for the first channel.

Next, in step S404, the line interface unit 16 performs the first operation as shown in procedure P204.
Perform a channel restart. In this procedure P204, as shown in FIG. 2, the line interface unit 16 sends a restart message (RES) including the call identification 1 for the first channel to the network on the D channel, and the network receives the suspended terminal. Notify Z of this message (NOTIFY) [RE
S], and sends a restart confirmation message (RES ACK) to the restarting terminal Y.

Next, in step S405, the system control unit 14 generates the additional channel call identification 2, and in the following step S406, the line interface unit 16 restarts the additional channel as shown in procedure P205. In this procedure P205, as shown in FIG. 2, the line interface unit 16 sends a restart message including the additional channel call identification 2 on the D channel to the network (RES), and the network sends to the suspended terminal Z. Notify this message to (NOTIFY) [RES],
A restart confirmation message (RES A
CK) is sent. Then, when the restart-side terminal Y receives the restart confirmation message (RES ACK) from the network, this restart processing ends. After this, as shown in Procedure P206, multimedia communication using the two B channels is performed between the terminals Y and Z.

Therefore, according to the first embodiment, 2
When suspending / resuming multimedia communication using one B channel, the suspending terminal X and the resuming terminal Y generate call identification information for each channel (call identification information corresponding to the same channel is different from that at the time of suspension). Since the same thing is generated at the time of resumption) (interruption / resumption) is executed, the device movement service during communication can be used even during communication using a plurality of information (B) channels. Also, since each call identification information is automatically generated when suspending / resuming is executed, the operator can suspend / resume multimedia communication without being aware of the content of the call identifying information and the number of channels in use. can do.

In the first embodiment, the suspending / resuming button 13a is used for suspending and resuming. However, the suspending button and the resuming button may be provided separately. Further, the content of the call identification information is not particularly limited within the range of the maximum character length defined by the network as long as it is a character string that differs for each B channel, and further, the B channel to be interrupted and resumed is It is not limited to two. Further, for example, when the terminals X and Y shown in FIG. 2 are physically the same, the user can move the location of the terminal and replace it with another connector on the same line, and the terminals X and Y are physically connected. In the case where they are different from each other, it indicates that the terminal used for communication can be switched to another terminal on the same line.

[Second Embodiment] Next, a second embodiment will be described with reference to FIGS. Since the hardware configuration of the second embodiment is exactly the same as that of the first embodiment of FIG. 1, the description thereof will be omitted (the same applies to the third embodiment). FIG. 5 shows the terminal X
2 shows a sequence according to the second embodiment in the case where the terminal X performs the interruption and the terminal Y resumes the communication performed between the terminal B and the terminal Z using two B channels. There is. The suspending / resuming process in the second embodiment will be described below with reference to FIGS.

First, the interruption process will be described. When multimedia communication is performed between the terminal X and the terminal Z using two B channels as in the procedure P211 shown in FIG. As shown in FIG. 6, Y monitors the pressing of the suspend / resume button 13a (step S311).
→ S312 → S311), when the suspend / resume button 13a is pressed, the process proceeds from step S312 to step S313, and the first channel call identification 1 (for example, IA5) input by the operation of the operation unit 13 or automatically generated. The character "CH1") and the additional channel call identification 2 (for example, IA5 character "CH2") are stored in the internal RAM by the system controller 14.

Next, in step S314, the line interface section 16 suspends the additional channel as shown in procedure P212. In this procedure P212, as shown in FIG. 5, the line interface unit 16 sends a suspend message (SUSP) including the additional channel call identification 2 to the network to the network, and the network sends to the suspended terminal Z. Notify this message to (NOTIFY) [SU
SP], and sends a suspension confirmation message (SUSP ACK) to the suspension terminal X.

Next, in step S315, the line interface unit 16 suspends the additional channel as shown in procedure P213. In this procedure P213, as shown in FIG. 5, the line interface unit 16 sends a suspend message (SUSP) including the call identification 1 for the first channel to the network on the D channel, and the network sends to the suspended terminal Z. Notify this message to (NOTIFY)
[SUSP], and also sends a suspend confirmation message (SUSP ACK) to the suspending terminal X.

When the suspending terminal X receives the suspend confirmation (SUSPACK) message from the network, in step S316, the line interface unit 16 sends the user / user information on the D channel as shown in procedure P214. Call setup (SETUP) including call identification 1 for the first channel and call identification 2 for the additional channel as elements
The message is transmitted on the same bus, and this interruption processing is ended.

When restarting the two B-channel communication interrupted in this way, the additional channel is restarted in the reverse order of the interrupt process, that is, after restarting the first channel. That is, in the restarting terminal Y, in the flowchart of FIG. 7, first, as shown in procedure P214, a call setup (SETU) including the call identification 1 for the first channel and the call identification 2 for the additional channel as the user / user information element.
P) When the message is received from the same bus (step S411), the system controller 14 stores the call identification 1 for the first channel and the call identification 2 for the additional channel in the internal RAM (step S412).

Next, the pressing of the suspend / resume button 13a is monitored (steps S413 → S414 → S413). When the suspend / resume button 13a is pressed, step S41
5, the line interface unit 16 causes the procedure P2.
As shown in 15, the restart of the first channel is executed. In this procedure P215, as shown in FIG. 5, the line interface unit 16 sends a restart message (RES) including the call identification 1 for the first channel on the D channel to the network, and the network receives the suspended terminal Z. This message is notified (NOTIFY) [RES], and a restart confirmation message (RES ACK) is sent to the restarting terminal Y.

Next, in step S416, the line interface unit 16 restarts the additional channel as shown in procedure P216. In this procedure P216, as shown in FIG. 5, the line interface unit 16 sends a restart message (RES) including the call identification 2 for the additional channel to the network on the D channel, and the network receives the suspended terminal Z.
Notify this message to (NOTIFY) [R
ES], and sends a restart confirmation message (RES ACK) to the restarting terminal Y. Then, the restarting terminal Y sends a restart confirmation message (RES ACK) from the network.
When this is received, this restart processing is terminated. After this, as shown in Procedure P217, the multimedia communication using the two B channels is performed between the terminals Y and Z.

Therefore, according to the second embodiment, the resuming side terminal Y receives the identification information for each channel used by the discontinuing side terminal X for the suspending process and restarts it, so that a plurality of information channels are used. Even when the communication is performed by using the service, the service of moving the device during communication can be easily used.

[Third Embodiment] Next, a third embodiment will be described with reference to FIGS. 8 shows a communication sequence between the suspending side terminal X and the suspended side terminal Y, FIG. 9 shows a voice receiving process of the suspended side terminal Y, and FIG. 10 is a suspended side terminal Y.
The image reception process of FIG. Procedure P221 shown in FIG.
When multimedia communication is being performed between the terminal X and the terminal Y as described above, when the terminal X interrupts the communication,
As in procedure P222, the suspension message (SUSP) is notified to the network, the network sends a suspension notification message (NOTIFY) [SUSP] to the suspended terminal Y, and confirms suspension to the suspended terminal X. Message (SUSP A
CK) is sent.

At the terminal Y to be suspended, as shown in FIG.
The reception of the interruption notification message (NOTIFY) [SUSP] is monitored (steps S321 → S322 → S32).
1) If the reception is confirmed, the process proceeds to step S323, and the voice receiving process by the voice encoding / decoding unit 5 and the demultiplexing unit 15 is stopped (step S323). Further, in the subsequent step S324, the reception frame structure of the demultiplexing unit 15 is set to the non-frame mode, and this process is ended.

The terminal Y on the suspended side further stops the image receiving process as shown in FIG. That is, the reception of the interruption notification message (NOTIFY) [SUSP] is monitored (steps S331 → S332 → S331),
When the reception is confirmed, the process proceeds to step S333, the received image is frozen by the video interface unit 9, and in the following step S334, the reception frame structure of the demultiplexing unit 15 is set to the non-frame mode and the video encoding / decoding unit is set. The image reception processing by 10 and the demultiplexing unit 15 is stopped, and this processing ends.

Therefore, according to the third embodiment, when the multimedia communication is interrupted, the terminal Y to be interrupted stops the voice receiving process and freezes the received image, so that the interrupted multimedia communication is stopped. In the device, it is possible to prevent noise from occurring in the voice on the speaker or the handset and to prevent the image of the other party on the display from being disturbed. Further, since the reception frame structure is changed to the non-frame mode, it is possible to prevent the reception synchronization from being lost.

The third embodiment can be applied to not only one B channel (64 kbps) in ISDN but also two B channels (128 kbps) in the basic interface and the primary group interface. In addition,
In this case, multiple interruption notification messages (NOTIF
Y) [SUSP] is confirmed, but when the first interruption notification message (NOTIFY) [SUSP] is detected, the audio reception process is stopped and the received image is frozen, and the received frame structure is set to non-frame mode. You can change it.

[0051]

As described above, according to the first aspect of the present invention, call identification information is generated for each information channel when communication is interrupted and resumed during communication using a plurality of information channels, and this call identification is performed. Since the interruption and restart processing is executed for each information channel according to the information, the in-communication device movement service can be used even during the communication using the plurality of information (B) channels.

According to the second aspect of the invention, when communication is interrupted and restarted during communication using a plurality of information channels, call identification information is generated for each information channel and notified to the resuming side terminal. Since the restart is executed for each information channel based on this call identification information, the in-communication device movement service can be used even during communication using a plurality of information (B) channels.

According to the third aspect of the invention, since the voice reception mode and the reception frame structure are changed when the interruption of the communication is detected, noise is generated in the reception voice when the communication is interrupted. It is possible to prevent the reception synchronization from being lost.

According to the fourth aspect of the invention, since the image reception mode is changed when the interruption of the communication is detected, it is possible to prevent the received image on the display from being disturbed when the communication is interrupted. You can

[Brief description of drawings]

FIG. 1 is a first to third multimedia communication device of the present invention.
It is a block diagram which shows an Example.

FIG. 2 is an explanatory diagram showing a communication sequence of a suspend / resume procedure of the first embodiment.

FIG. 3 is a flowchart showing an interruption process of the first embodiment.

FIG. 4 is a flowchart showing a restart process of the first embodiment.

FIG. 5 is an explanatory diagram showing a communication sequence of the second embodiment.

FIG. 6 is a flowchart showing an interruption process of the second embodiment.

FIG. 7 is a flowchart showing a restart process of the second embodiment.

FIG. 8 is an explanatory diagram showing a communication sequence of a third embodiment.

FIG. 9 is a flowchart showing a voice receiving process at the time of interruption of the third embodiment.

FIG. 10 is a flowchart showing an image receiving process at the time of interruption of the third embodiment.

[Explanation of symbols]

 5 audio encoding / decoding section 9 video interface section 13 suspend / resume button 14 system control section 15 demultiplexing section 16 line interface section

Claims (8)

[Claims] 1. Generation means for generating call identification information for each of a plurality of information channels related to use when interruption or resumption of multimedia communication performed using a plurality of information channels is instructed. Interruption execution means for executing an interruption for each information channel using the call identification information generated by the generation means when the interruption of the multimedia communication is instructed, and the multimedia communication interrupted by the interruption execution means Resuming execution means for executing resumption for each information channel by using the call identification information generated by the generation means when the restarting of the multimedia communication apparatus is instructed. 2. When interruption is instructed to multimedia communication using a plurality of information channels,
Discontinuation executing means for executing discontinuation for each information channel by using different call identification information for each of a plurality of information channels to be used, and a call for each information channel used when the interruption is executed by the interruption executing means Transmitting means for transmitting the identification information, receiving means for receiving the call identification information transmitted by the transmitting means, and receiving by the receiving means when restarting the multimedia communication suspended by the suspending executing means is instructed A multimedia communication device, comprising: a restart execution unit that executes restart for each information channel using the received call identification information. 3. In a multimedia communication device for performing multimedia communication with respect to various media such as images, voices, data, etc., a detecting means for detecting interruption of communication made by a communication partner, and the interruption of communication by the detecting means. A multimedia communication device, comprising: a change means for changing a voice reception mode and a reception frame structure when detected. 4. The multimedia communication device according to claim 3, wherein the changing unit changes the voice reception mode to a voice reception stop mode. 5. The multimedia communication device according to claim 3, wherein the changing unit changes the received frame structure to a non-frame mode. 6. A multimedia communication device for multimedia communication of various media such as images, voices, data, etc., and detecting means for detecting interruption of communication made by a communication partner, and interruption of communication by the detecting means. A multimedia communication device, comprising: a changing unit that changes an image reception mode when detected. 7. The multimedia communication device according to claim 6, wherein the changing unit changes the image reception mode to an image freeze mode. 8. The multimedia communication device according to claim 6, wherein the changing unit changes the image reception mode to an image reception stop mode.