Communication conference terminal equipment

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Industrial application field]

The present invention relates to a communication conference terminal device having a communication conference terminal function for exchanging at least video information and audio information.

【0002】

[Conventional technology]

In recent years, a communication conference terminal device capable of exchanging voice information and video information with a partner terminal and performing predetermined conference communication is regarded as promising as a terminal using ISDN, and various systems have been proposed. ing.

【0003】

In addition, there is a conference reservation function that reserves and registers the date and time of the conference in advance and automatically executes the conference communication session at the registered date and time, so that even if the participants do not perform any special operation, it will be automatically performed. A communication conference terminal device that enables conference communication has also been put into practical use.

【0004】

[Problems to be Solved by the Invention]

However, such a conventional device has the following inconveniences.

【0005】

That is, for example, when a conference participant is urgently required to participate in a conference at the reserved date and time, or when the reserved conference participant makes a mistake in the reserved date and time, the communication conference terminal device Even if the call is set with the specified partner terminal at the reserved date and time and the communication conference session is started, the appropriate communication conference is not performed because the conference participants are not participating, and the communication cost. Was sometimes wasted.

【0006】

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a communication conference terminal device capable of eliminating wasteful communication costs.

【0007】

[Means for solving problems]

The present invention is an audio level that outputs a detection signal when it detects that the audio level of audio information is equal to or higher than a predetermined value in a communication conference terminal device having at least a communication conference terminal function for exchanging moving image information and audio information. If the detection signal is not output from the voice level detection means for a predetermined time or longer during the communication operation with the detection means, the communication operation at that time is cut off and the line is disconnected and restored. It is prepared.

【0008】

Further, at least in a communication conference terminal device having a communication conference terminal function for exchanging video information and audio information, an audio level detection means that outputs a detection signal when it detects that the audio level of audio information is equal to or higher than a predetermined value. If, during the communication operation, the time during which the detection signal is not output from the voice level detecting means continues for more than the preset determination time value, the communication operation at that time is terminated and the line is disconnected and restored. It is provided with a control means for setting and inputting an operation input means for setting and inputting the determination time value.

【0009】

Further, at least in a communication conference terminal device having a communication conference terminal function for exchanging video information and audio information, a detection signal is output when it is detected that the audio level of the audio information is equal to or higher than a preset determination value. If the detection signal is not output from the voice level detecting means during the communication operation with the voice level detecting means for a predetermined time or longer, the communication operation at that time is cut off and the line is disconnected and restored. It is provided with a control means and an operation input means for setting and inputting the above-mentioned determination value.

【0010】

Further, at least in a communication conference terminal device having a communication conference terminal function for exchanging video information and audio information, a detection signal is output when it is detected that the audio level of the audio information is equal to or higher than a preset determination value. If the time during which the detection signal is not output from the voice level detecting means continues for more than a preset determination time value during the communication operation with the voice level detecting means to be performed, the communication operation at that time is terminated. It is provided with a control means for disconnecting and recovering the line and an operation input means for operating and inputting the above-mentioned determination value and determination time value.

【0011】

Further, at least in a communication conference terminal device having a communication conference terminal function for exchanging video information and voice information, an operation display means for displaying and outputting various messages to the user and accepting operation input from the user, and voice information. A voice level detecting means that outputs a detection signal when it is detected that the voice level of is equal to or higher than a predetermined value, and a time during which the detection signal is not output from the voice level detecting means continues for a predetermined time or longer during communication operation. If so, a disconnection notice message is displayed and output to the operation display means, and when a negative response of communication disconnection is not input by the operation display means, the communication operation at that time is cut off and the line is disconnected and restored, and the above When a negative response of communication disconnection is input by the operation display means, the control means for continuing the communication operation at that time is provided.

【0012】

Further, at least in a communication conference terminal device having a communication conference terminal function for exchanging video information and voice information, an operation display means for displaying and outputting various messages to the user and accepting operation input from the user, and voice information. A voice level detecting means that outputs a detection signal when it is detected that the voice level of is equal to or higher than a predetermined value, and a time during which the detection signal is not output from the voice level detecting means are preset. If it continues for more than the determination time value, a disconnection notice message is displayed and output to the operation display means, and if a negative response for communication disconnection is not input by the operation display means, the communication operation at that time is terminated and the line is disconnected. It is equipped with a control means for continuing the communication operation at that time when a negative response of communication disconnection is input by the operation display means while recovering the disconnection, and an operation input means for setting and inputting the determination time value. is there.

【0013】

Further, at least in a communication conference terminal device having a communication conference terminal function for exchanging video information and voice information, an operation display means for displaying and outputting various messages to the user and accepting operation input from the user, and voice information. A voice level detecting means that outputs a detection signal when it is detected that the voice level of is equal to or higher than a preset determination value, and a time during which the detection signal is not output from the voice level detecting means during communication operation. If it continues for a predetermined time or longer, a disconnection notice message is displayed and output to the operation display means, and if a negative response for disconnection is not input by the operation display means, the communication operation at that time is terminated and the line is disconnected. It is provided with a control means for continuing the communication operation at that time when a negative response of communication disconnection is input by the operation display means and an operation input means for setting and inputting the determination value.

【0014】

Further, at least in a communication conference terminal device having a communication conference terminal function for exchanging video information and voice information, an operation display means for displaying and outputting various messages to the user and accepting operation input from the user, and voice information. A voice level detecting means that outputs a detection signal when it is detected that the voice level of is equal to or higher than a preset determination value, and a time during which the detection signal is not output from the voice level detecting means during communication operation. If it continues for more than the preset judgment time value, a disconnection notice message is displayed and output to the operation display means, and if a negative response of communication disconnection is not input by the operation display means, the communication at that time is performed. When the operation is cut off and the line is disconnected and restored, and a negative response for communication disconnection is input by the operation display means, the control means for continuing the communication operation at that time and the determination value and the determination time value are input. It is equipped with an operation input means.

【0015】

Further, the voice level of the voice information determined by the voice level detecting means is a transmission voice signal transmitted from the own terminal to the other terminal or a received voice signal received from the other terminal.

【0016】

[Action]

Therefore, when a line is set up with the other terminal and a communication conference session is started without a conference participant, voice information is not exchanged and the voice level does not exceed the set value. It is possible to avoid a situation in which the conference session ends and the line cost is wasted.

【0017】

Further, since the user can appropriately set the voice level judgment condition for ending the communication conference session and the judgment value of the silence period, the judgment condition and the judgment value can be set according to the usage pattern of the user. This allows you to avoid accidentally ending a communication conference session.

【0018】

In addition, when the communication conference session is terminated, the user is notified to that effect and an inquiry is made as to whether or not the communication conference session is terminated. Therefore, for example, a situation in which both terminals are not temporarily talking while the conference is in progress. Therefore, it is possible to avoid a situation in which the communication conference session ends.

【0019】

[Example]

Hereinafter, examples of the present invention will be described in detail with reference to the accompanying drawings.

【0020】

FIG. 1 shows a communication conference terminal device according to an embodiment of the present invention. This communication conference terminal device uses the basic interface of ISDN as a transmission line, and has a voice information communication function, a video information communication function, a still image information communication function, and a multiplexing communication function of these communication functions. In addition, it is possible to connect to the basic interface of ISDN and perform data communication using two information channels (B channel).

【0021】

In the figure, the system control unit 1 controls control processing of each part of the communication conference terminal device, processing of a higher layer of video conference communication, execution processing of various application programs included in the communication conference terminal device, and various types. The ROM (read-only memory) 2 executes control processing, and the ROM (read-only memory) 2 stores a part of the control processing program executed by the system control unit 1 and various data necessary for executing the control processing program. It is stored, and the RAM (random access memory) 3 constitutes the work area of the system control unit 1.

【0022】

The clock circuit 4 is for outputting the current date and time information, and the image processing unit 5 is, for example, a reduction / enlargement processing of an image, a still image processing of a shooting screen, a coding / decoding processing of a still image ( JPEG method), statistical processing of images, scaling processing of image data, resolution conversion processing, etc., for performing various image processing necessary for the device functions provided by this communication conference terminal device. is there.

【0023】

The magnetic disk device 6 is for storing program data such as other control programs and application programs executed by the system control unit 11, or various other data, and the operation display unit 7 is used for this communication conference. It is for operating a terminal device, and the still image input device 8 is composed of, for example, a video camera device or the like, and is for inputting a still image.

【0024】

The voice input / output device 9 is for inputting voice for a call to a microphone and outputting it to a speaker, and the analog voice signal input to the microphone from the voice input / output device 9 is sent to the voice CODEC 10 and the voice level determination unit 11. The analog voice signal that is output and output from the voice CODEC10 and the response voice signal that is output from the voice response device 12 are added to the voice input / output device 9, and from the voice input / output device 9, they are added. The voice of the voice signal is output.

【0025】

The voice CODEC10 is for performing signal conversion processing of analog signal / digital data for transmitting an analog voice signal using the B channel of ISDN, and the voice response device 12 is, for example, a disconnection warning voice message or the like. It outputs voice signals of various voice messages to be notified to the user on the own terminal side.

【0026】

The voice level determination unit 11 checks whether the received voice signal and the transmitted voice signal are larger than the voice reference level specified by the system control unit 1, and both the received voice signal and the transmitted voice signal are higher than the voice reference level. When it becomes large, the detection signal LS is output, and the detection signal LS is added to the system control unit 1. Further, the voice control unit 13 is for controlling the voice input / output operation of the voice input / output device 9.

【0027】

The video camera device 14 is for capturing a video on the user side of the communication conference terminal device, and the moving image signal output from the video camera device 14 is added to the video signal input terminal of the video CODEC 15 and is also added. It is added to the video signal input end of the display control unit 16. The video camera control unit 17 is for controlling operations such as shooting on / off, zooming in / zooming out, and panning of the video camera device 13.

【0028】

The video CODEC15 encodes and compresses the NTSC format video signal output from the video camera device 16 by the coding method of CITT Recommendation H.261 to form video information, and also outputs the video information in the coded and compressed state. It is decrypted and converted into a video signal. The video signal converted and formed by the video CODEC 15 is applied to the display control unit 16. The display control unit 16 is for controlling the contents of the display screen of the video monitor device 18.

【0029】

The ISDN interface circuit 20 is connected to ISDN and has a layer 1 signal processing function of ISDN and a function of integrating / separating a D channel signal and two B channel signals, and the D channel signal is D. It communicates with the channel transmission control unit 21, and the signals of the two B channels are exchanged with the multiplexing / separating device 22.

【0030】

The D-channel transmission control unit 21 includes a layer 2 signal processing function of the D channel and a call control processing function for connecting / disconnecting one or two B channels.

【0031】

The multiplexing / separating device 22 multiplexes data of a plurality of media such as audio, video, and general-purpose data (other data such as still image data) exchanged using the B channel, and TTC standard JT-H. The frame data specified in 221 is formed and sent to the line side, and the data of a plurality of media multiplexed with the received frame data is separated. The multiplexing / separating device 22 exchanges audio data with the audio CODEC10 and exchanges video data with the video CODEC14.

【0032】

These system control units 1, ROM2, RAM3, clock circuit 4, image processing unit 5, magnetic disk device 6, operation display unit 7, still image input device 8, audio CODEC10, audio level determination unit 11, audio control unit 13, The video CODEC15, the display control unit 16, the video camera control unit 17, the D channel transmission control unit 21, and the multiplexing / separation device 22 are connected to the internal bus 23, and data exchange related to each of these elements is performed. , Primarily done via the internal bus 23.

【0033】

FIG. 2 shows an example of the operation display unit 7.

【0034】

The operation display unit 7 includes, for example, a liquid crystal display device 25 having a resolution of about 640 × 480 (~ 1000 × 1000) (dots) and a touch panel device 26 attached to the display screen of the liquid crystal display device 25. It is provided. Further, the touch pen 27 is for appropriately touching the operation surface of the touch panel device 26.

【0035】

By the way, in the communication conference terminal device, data is exchanged in the multi-frame format specified by TTC standard JT-H.221 in the B channel.

【0036】

As shown in FIG. 3, one multi-frame MFL is composed of eight sub-multi-frames SMF1 to SMF8, and each sub-multi-frame SMF1 to SMF8 is composed of two frames. That is, one multi-frame MFL consists of 16 frames FLM0 to FLM15.

【0037】

As shown in FIG. 4, each frame FLM0 to FLM15 consists of 80 octets of data, and each bit position in which those octets are arranged in bit order constitutes subchannels SCH1 to SCH8.

【0038】

In addition, the 8th bit of the 1st octet to the 8th octet constitutes the Frame Alignment Signal FAS, and the 8th bit of the 9th octet to the 16th octet constitutes the Bit rate Allocation Signal. ) Configure BAS. That is, the sub-channel SCH8 is assigned to the 8th bit of the 17th octet to the 80th octet, and this part is sometimes called the application channel AC (Application Channel). In addition, the data of the encryption channel for exchanging key information for encrypting the data may be set in the 17th to 24th octets of the subchannel SCH8 (optional).

【0039】

In this way, the frame synchronization signal FAS is arranged in 8 bits in one frame FLM0 to FLM15, and the bit allocation is configured in units of multi-frame MFL as shown in FIG.

【0040】

That is, the second to eighth octets of the even frames FLM0, FLM2, ..., FLM14, and the subsequent odd frames FLM1, FLM3, ..., FLM15 consist of an 8-bit data pattern of "00110111". A horizontal synchronization signal is arranged, and a vertical synchronization signal consisting of a 6-bit data pattern of "001011" is arranged in the first octet of odd-numbered frames FLM1, FLM3, ..., FLM11.

【0041】

By detecting the horizontal synchronization signal and the vertical synchronization signal, it is possible to detect the synchronization of one multi-frame MFL.

【0042】

The bits N1, N2, N3, N4, N5 of the first octet of the 0th frame, the 2nd frame, the 4th frame, the 6th frame, and the 8th frame are used for displaying the multi-frame number. Of these, bit N5 is used to indicate whether or not a multiframe number is used. In this way, since the data used for the multi-frame number is 4 bits, the multi-frame number changes in descending order with a value from 0 to 15, and the same multi-frame number appears every 16 multi-frames.

【0043】

In addition, the bits L1, L2, and L3 of the first octet of the 10th frame, the 12th frame, and the 13th frame are connected to the B channel carrying the frame among the currently used B channels. It is used to display the connection number that represents the order. In addition, the bit R of the first octet of the 15th frame is reserved (reserved) for future recommendations, and its value is set to 0.

【0044】

Further, the bit TEA of the first octet of the 14th frame is used to indicate that data transmission is not possible due to an internal failure of the data terminal device.

【0045】

Bit A in the third octet of odd-numbered frames FLM1, FLM3, ..., FLM15 is used to indicate whether frame synchronization or multi-frame synchronization has been established, or whether synchronization has occurred.

【0046】

Also, the bits C1, C2, C3, C4 of the 5th octet, 6th octet, 7th octet, and 8th octet of the odd frames FLM1, FLM3, ..., FLM15 are two consecutive frames (that is, It is for displaying the CRC (Cyclic Redundancy Check) code referred to for data error detection (that is, transmission line quality detection) of sub-multiframe), and this odd frame FLM1, FLM3, ..., FM15. Bit E in the 4th octet of is used to indicate that a transmission error has been detected on the receiving side.

【0047】

As for the bit rate allocation signal BAS, as shown in FIG. 6, in the even frame FLM0, FLM2, ..., FLM14, 8-bit data representing the capability BAS or BAS command is arranged, followed by the odd frame FLM1, FLM3. In, ..., FLM15, a double error correction code for error-correcting the value of the capability BAS or BAS command sent in the immediately preceding frame is arranged.

【0048】

In addition, the data of the multi-frame MFL is transmitted in the order of the frame numbers, and each frame FLM0 to FLM15 is sent in the octet order of the 1st octet to the 80th octet as shown in FIG. 7, and each octet is transmitted. , The first bit is sent first.

【0049】

That is, in each frame FLM0 to FLM15, the first bit of the first octet is transmitted first, and the eighth bit of the 80th octet is transmitted last.

【0050】

FIG. 8 shows a general procedure example of the TTC standard JT-H.242 applied as a transmission control procedure executed when an audiovisual terminal such as a communication conference terminal device transmits data using the B channel. In this case, an example of a transmission procedure when exchanging audio data, general-purpose data, and moving image data between terminals using two B channels is shown.

【0051】

First, the calling terminal calls the destination terminal and performs the call setting procedure on the D channel to secure one B channel (hereinafter referred to as the first channel) (Phase A), and then on the set first channel. Frame synchronization is performed while exchanging frame data with PCM audio data (A rule or μ rule, 64Kbps) set in (frame mode), and when frame synchronization is established, ability BAS data and command BAS data are exchanged with each other (frame mode). Phase B1-1), the transmission mode to be used at that time is determined, and the additional call setting request for securing the second B channel is started (Phase B1-2).

【0052】

Then, from the contents of the transmission modes exchanged with each other at that time, in principle, the mode with the highest function common to each other is selected (Phase B1-3), and the calling terminal is transferred to the incoming terminal in the selected operation mode. Send a BAS command that specifies the terminal function to operate the function, and set the parameters common to the device functions of the calling terminal and the incoming terminal (Phase B2). As a result, in the first channel, for example, data transmission of audio data (16Kbps) and data transmission of moving image data (46.4Kbps) corresponding to the transmission mode selected at that time are performed (Phase C).

【0053】

When the first channel starts data transmission in frame mode, the call setting procedure is performed on the D channel for the second B channel (hereinafter referred to as the second channel) (Phase CA), and when the second channel is established, the second channel is established. Frame data containing only the frame sync signal FAS and bit allocation signal BAS is exchanged using two channels to establish frame sync and multiframe sync (Phase CB1-11), and then between channels 1 and 2. Establish synchronization (Phase CB1-12).

【0054】

When the synchronization of the two B channels is completed, a BAS command is sent from the calling terminal side to set the transmission mode (Phase CB1-2), and the transmission mode is switched to the set contents (Phase CB1-3), which is common. Set the parameters (Phase CB3).

【0055】

In this way, when the initialization of the second channel is completed, after that, the frame data exchanged on the first channel and the frame data exchanged on the second channel are synchronized, and the two B channels are set. In use, for example, audio data, general purpose data, and video data are data transmitted at transmission rates of 58 Kbps, 6.4 Kbps, and 62.4 Kbps, respectively (see FIG. 9). Here, the general-purpose data channel exchanges data in C & I mode (conference control function) other than voice data, for example, data in C & I function, telewriting communication function, and bulk transfer function (group 4 facsimile data, etc.). Used for

【0056】

When ending such data transmission, first disconnect from the second channel. At this time, for audio data transmission performed only on the first channel, a procedure for setting a common mode is performed (phase CD1), and the second channel is mode-switched to mode 0F of the frame mode (phase CD1). Phase CD2). At this time, the first channel and the second channel are asynchronous, and the second channel is in a state where the call is held in the transmission state of only the frame synchronization signal FAS and the bit allocation signal BAS, and the call of the D channel is disconnected. The release procedure is ready to release the call on channel 2.

【0057】

In addition, in the first channel, between phase CD1 and phase CD2, audio data and video data are transmitted at a total transmission speed of 62.4 Kbps in frame mode, and when the operator of one terminal ends the call, the video is transmitted. End the data transmission, switch to mode 0F to use all the transmission capacity of the first channel including the transmission capacity of this video data for voice transmission (Phase D2), and then disconnect the D channel call. The release procedure is ready to release the call on channel 1.

【0058】

As a result, for the first channel and the second channel, the call disconnection release procedure is executed on the D channel (Phase E), and the audiovisual transmission between the two terminals is completed.

【0059】

In this way, in an audiovisual terminal such as a communication conference terminal device, after first securing one B channel (first channel) and establishing a frame mode, the transmission speed of audio data and video data in this first channel. If it is possible to set the second B channel (second channel) to each other at the same time while performing data transmission in the transient mode by allocating, secure the second channel by the call setting procedure of the D channel. Then, the first channel transmitting in the transient mode and the newly secured second channel are channel-synchronized, and when the channel synchronization is established, the transmission speed allocation of the audio data and the video data is reset. However, in order to utilize the increased transmission capacity of the B channel, the coding rule (coding method) of the voice data and the video data is changed so that higher quality voice data and the video data can be exchanged. There is.

【0060】

Further, when the data transmission is terminated, it is necessary to change from the mode in which the transmission line in which both the first channel and the second channel are synchronized is used to the mode in which only the first channel is used. Therefore, first, each coding rule of audio data and video data is set to a method that optimizes the transmission capacity of 62.4 Kbps of the first channel, and the transmission mode is changed to only the first channel. The synchronization state with the first channel is stopped, the mode shifts to mode 0F in which the user data is in the free transmission state, and the call is disconnected / released according to the call disconnection / release procedure of the D channel. In addition, after changing from two types of media transmission of audio data and video data to mode 0F, which is a transmission mode of only audio data, the first channel disconnects / releases the call according to the call disconnection / release procedure of the D channel. .. Note that the first channel can be disconnected / released after the mode is directly changed to mode 0F without switching the mode to two types of media transmission, audio data and video data. In addition, the billing information obtained in the call disconnection / release procedure is managed for each channel.

【0061】

With the above configuration, this communication conference terminal device executes the process shown in FIG. 10 while executing a conference communication session with any of the other terminals to determine the line disconnection status. There is.

【0062】

First, it is checked whether communication is in progress at that time (judgment 101), and when the result of the judgment 101 is YES, a predetermined set value is set in a predetermined monitoring timer (soft timer) (process 102). The monitoring timer is started (process 103). Here, the value set in the monitoring timer is a value input by the user by setting the disconnection determination time in advance, and for example, a value of about 3 to 10 minutes is set.

【0063】

In this state, before the monitoring timer times out, it monitors whether the signal LS is output from the voice level determination unit 11 (NO loop of determination 104, 105). Here, when the user of the own terminal or the user of the other terminal speaks, the voice level of the transmitted voice signal or the received voice signal becomes higher than the voice reference level set in the voice level determination unit 11, so that the voice level is determined. The signal LS is output from the unit 11.

【0064】

When a normal conference communication session is established, it is considered that the user of the own terminal or the user of the other terminal makes some remarks before the monitoring timer times out. In that case, the result of judgment 105 is It becomes YES. At this time, the monitoring timer is stopped (process 106), the determination 101 is returned, and the monitoring timer is reset.

【0065】

On the other hand, even when a normal conference communication session is established, if the users of both terminals refer to the materials or take a short break in the conference, they may not speak for a long time. Further, when the conference communication session is started but both users are not present, the transmitted audio signal and the received audio signal may not be selected.

【0066】

In such a case, the signal LS is not output from the voice level determination unit 11 until the monitoring timer times out, and therefore the result of the determination 104 is YES.

【0067】

Then, for example, a disconnection notice voice guidance message with the content "Discontinue communication. Touch the [NO] button to continue. Touch the [YES] button to discontinue." Is output from the voice response device 12 (process 107), and a disconnection notice guidance message having the same content is displayed on the operation display unit 7 (process 108).

【0068】

In that state, whether the user operates the operation display unit 7 after starting the timer TT for a predetermined time (for example, 30 seconds) for determining the guidance operation (process 109) and before the timer TT times out. Monitor whether (NO loop of judgment 110,111).

【0069】

When the user who listens to the disconnection notice voice guidance message and sees the disconnection notice guidance message touches the operation display unit 7 to continue or terminate the communication and the result of the determination 110 becomes YES, then. Check whether the target operated by is the symbol of the [YES] button displayed on the operation display unit 7 (judgment 112).

【0070】

When the result of judgment 112 is YES, it means that the user wants to end the communication. Therefore, the conference communication session at that time is ended, the information channel is terminated (process 113), and the predetermined line disconnection / opening procedure is performed. It executes and disconnects and opens the two information channels reserved at that time (process 114), and ends this process.

【0071】

Also, when the user wishes to continue communication, it is determined when a symbol other than the [YES] button displayed on the operation display unit 7 (for example, [NO] button or [Cancel] button) is operated. When the result of 112 becomes NO, the timer TT is stopped and the judgment 101 is returned.

【0072】

In addition, when there is no user, no valid operation input is made for the disconnection notice voice guidance message and the disconnection notice guidance message, and the timer TT times out, and the result of judgment 111 becomes YES, a conference session is held. Since there is no user to perform, the process proceeds to process 113 and the conference communication operation is terminated.

【0073】

As described above, in the present embodiment, when the period during which the transmitted audio signal or the received audio signal is below the reference level exceeds a predetermined time, the user is confirmed to end the communication, and the communication is not terminated. When is specified, the communication is continued, and when the communication is specified to be terminated and when no effective operation is performed, the communication is terminated, so that unnecessary line cost can be prevented.

【0074】

In addition, since the user can set appropriate values for the voice reference level for determining the end of communication and the determination time for the silence period, an appropriate communication end determination should be made according to the convenience of the user. Can be done. As a result, the usability of the communication conference terminal device is greatly improved.

【0075】

The present invention can be similarly applied to a communication conference terminal device having a configuration other than the above-mentioned communication conference terminal device.

【0076】

[Effect of the invention]

As described above, according to the present invention, when a line is set up with the other terminal without a conference participant and a communication conference session is started, voice information is not exchanged and the voice level is changed. Since the set value is not exceeded, the communication conference session is terminated, which has the effect of avoiding a situation in which the line cost is wasted.

【0077】

Further, since the user can appropriately set the voice level judgment condition for ending the communication conference session and the judgment value of the silence period, the judgment condition and the judgment value can be set according to the usage pattern of the user. This can be set, which also has the effect of avoiding a situation in which the communication conference session is inadvertently terminated.

【0078】

In addition, when the communication conference session is terminated, the user is notified to that effect and an inquiry is made as to whether or not the communication conference session is terminated. Therefore, for example, a situation in which both terminals are not temporarily talking while the conference is in progress. Therefore, it is possible to avoid a situation in which the communication conference session ends.

[Simple explanation of drawings]

[Figure 1]

The block diagram which showed the communication conference terminal apparatus which concerns on one Embodiment of this invention.

[Figure 2]

The schematic block diagram which showed an example of the operation display part.

[Fig. 3]

The schematic diagram which shows an example of the frame structure of a multi-frame.

[Fig. 4]

The schematic which shows an example of the signal composition of one frame.

[Fig. 5]

The schematic which shows an example of a frame adjustment signal.

[Fig. 6]

The schematic which shows an example of a bit allocation signal.

[Fig. 7]

The schematic diagram for demonstrating the transmission order of a signal.

[Fig. 8]

A time chart showing a general procedure example of TTC Recommendation JT-H.242 (a domestic standard corresponding to CCI TT Recommendation H.242).

[Fig. 9]

The schematic diagram which showed an example of the signal allocation of a channel when transmitting audio data, video data, and general-purpose data using two information channels.

[Fig. 10]

A flowchart showing a processing example for determining the end of communication during communication.

[Explanation of symbols]

1 System control unit 7 Operation display 11 Voice level judgment unit 12 Voice response device