JPH09331407A - Video conference communication terminal equipment and multi-point controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability of ISDN video conference communication by sending/receiving a push button signal via a GSTN separately so as to operate a video camera of an opposite terminal equipment. SOLUTION: An ISDN interface circuit 17 is provided with an integration/ separation function for a D channel and two B-channel signals and makes communication of the B channel signals with a multiplexer/demultiplexer 19. The multiplexer/demultiplexer 19 multiplexes a plurality of audio and moving image data and generates frame data and sends the data to a line. Furthermore, the multiplexer/demultiplexer 19 makes communication of audio data and moving image data of the received frame data with a voice CODEC 9 and a video CODEC 13 respectively. A GSTN interface circuit 20 is connected to a general exchange network to make data communication. A touch panel device 7 generates a command to operate a camera pickup angle and zooming or the like to control a camera 11 of the opposite terminal equipment via the general exchange network.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video conference communication terminal device equipped with a video conference communication function for communicating at least moving image information, audio information and general-purpose data in a multiplexed state using ISDN as a transmission path, and Using ISDN as a transmission path, a call is established with a plurality of video conference communication terminal devices having a video conference communication function for communicating at least video information, audio information, and general-purpose data in a multiplexed state, and a predetermined multipoint control function is established. Relates to a multipoint control device for processing

[0002]

2. Description of the Related Art In recent years, as a communication application using ISDN, a video conference communication terminal device or a video telephone device (hereinafter referred to as a video conference communication terminal device or a video telephone device) having a video conference communication function for communicating at least moving image information, audio information and general-purpose data in a multiplexed state. , Which are collectively referred to as video conference communication terminal devices) are in practical use.

In this video conference communication terminal device, since it is possible to have a conversation while watching the situation of the other party as a moving image, it is possible to perform a very smooth conference communication. Further, a facsimile communication function or a telewriting communication function can be used as an additional function, so that the video conference communication referring to the material can be performed more smoothly.

[0004]

By the way, there is a case where it is desired to change the shooting angle (camera angle) of the receiving screen being displayed during such video conference communication. The other terminal is informed that the user wants to change the shooting angle, and the user of the other terminal switches the shooting angle.

Therefore, it takes time and effort to obtain a desired shooting angle, and it is difficult to switch to the desired shooting angle.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a video conference communication terminal device and a multipoint control device which can reduce the trouble when switching the shooting angle of the reception screen.

[0007]

According to the present invention, there is provided a video conference communication terminal apparatus having a video conference communication function for communicating at least moving picture information, audio information and general data in a multiplexed state using ISDN as a transmission path. , A general switching network interface means for accommodating the general switching network, a tone signal generating means for transmitting a predetermined tone signal to the general switching network via the general switching network interface means, and the general switching network interface means. The tone signal detection means for detecting the tone signal received by the general switching network interface means with the other terminal that has established a call via ISDN.
When the call is established through the general exchange network and the shooting mode of the moving image information received from the partner terminal is operated, the tone signal corresponding to the predetermined operation code corresponding to the operation content is generated by the tone signal generation means. On the other hand, when the tone signal detecting means detects the tone signal and sends the detected signal to the partner terminal, and the detected content corresponds to the predetermined operation code, the video camera is changed to a shooting mode corresponding to the operation code. It is designed to operate the device.

Further, in a video conference communication terminal device having a video conference communication function for communicating at least video information, audio information and general-purpose data in a multiplexed state using ISDN as a transmission line, a general exchange network is generally accommodated. Switch network interface means, push button signal generating means for transmitting a predetermined push button signal to the general exchange network via the general exchange network interface means, and push button signal received via the general exchange network interface means. And a push button signal detecting means for detecting a call, and the general exchange network interface means establishes a call with the other terminal which has established a call via ISDN, and
When operating the shooting mode of the moving image information received from the partner terminal, the push button signal corresponding to a predetermined operation code corresponding to the operation content is sent to the partner terminal by the push button signal generating means, while the push button signal is sent. When the detection means detects the push button signal and the detected content is content corresponding to the predetermined operation code, the video camera device is operated in a shooting mode corresponding to the operation code. .

Further, a predetermined tone signal is generated in a video conference communication terminal device having a video conference communication function for communicating at least video information, audio information and general-purpose data in a multiplexed state using ISDN as a transmission path. A tone signal generating means, a mixer circuit for mixing a transmission voice signal and the tone signal generated by the tone signal generating means, and a tone signal detecting means for detecting the tone signal from the reception voice signal, and receiving from a partner terminal. When operating the shooting mode of the moving image information, the tone signal generating means generates the tone signal corresponding to a predetermined operation code corresponding to the operation content and sends the tone signal to the partner terminal, while the tone signal detecting means operates. When the tone signal is detected and the detected content corresponds to the predetermined operation code, The imaging mode corresponding to the operation code is obtained so as to operate the video camera apparatus.

Further, a predetermined push button signal is generated in a video conference communication terminal device having a video conference communication function for communicating in a state where at least moving image information, voice information and general-purpose data are multiplexed by using ISDN as a transmission line. A push button signal generating means, a mixer circuit for mixing a transmission voice signal and a push button signal generated from the push button signal generating means, and a push button signal detecting means for detecting the push button signal from the reception voice signal, When operating the shooting mode of the moving image information received from the partner terminal, a push button signal corresponding to a predetermined operation code corresponding to the operation content is generated from the push button signal generating means and transmitted to the partner terminal, while The push button signal detection means detects the push button signal and If the detected contents are contents corresponding to the predetermined operation code is one which is adapted to operate the video camera apparatus to the imaging mode corresponding to the operation code.

As the push button signal generating means, an external telephone connectable to the main body of the apparatus can be used. Further, an operation screen for displaying the operation content received from the partner terminal may be combined with the shooting screen of the video camera device.

Further, by using ISDN as a transmission path, a call is established with a plurality of video conference communication terminal devices having a video conference communication function for communicating at least video information, audio information and general-purpose data in a multiplexed state, and a predetermined call is established. In the multipoint control device for processing the multipoint control function, the tone signal generating means for generating a predetermined tone signal, the transmission voice signal and the tone signal generating means for each of the video conference communication terminal devices that have established a call. A mixer circuit that mixes the generated tone signals and a tone signal detection unit that detects the tone signals from the received audio signal, the tone signal detection units detect the tone signals, and the detected content is the received moving image. If the content corresponds to a predetermined operation code for operating the shooting mode of information, at that time, To the constant TV conference via through-terminal devices,
The tone signal generating means generates the tone signal corresponding to a predetermined operation code corresponding to the received operation content and transmits the tone signal.

In addition, a call is established with a plurality of video conference communication terminal devices having a video conference communication function for communicating at least video information, audio information, and general-purpose data in a multiplexed state using ISDN as a transmission line, and a predetermined call is established. In the multipoint control device for processing the multipoint control function, the pushbutton signal generating means for generating a predetermined pushbutton signal, the transmission voice signal, and the pushbutton signal for each video conference communication terminal device that has established a call. A mixer circuit that mixes the push button signal generated from the generating means and a push button signal detecting means that detects the push button signal from the received audio signal are provided, and the push button signal detecting means detects the push button signal. A predetermined operation for operating the shooting mode of the moving image information whose detection content is received If the content corresponds to the mode, the push button signal corresponding to the predetermined operation code corresponding to the received operation content is sent to the specific video conference history terminal device of the distribution source of the video information at that time. The push button signal generating means generates and sends the signal.

[0014]

DETAILED DESCRIPTION OF THE INVENTION Referring to the accompanying drawings,
An embodiment of the present invention will be described in detail.

FIG. 1 shows a video conference communication terminal device according to an embodiment of the present invention. This video conference communication terminal device uses a basic interface of ISDN as a transmission path, and is provided with a voice information communication function, a moving image information communication function, a telewriting function, and a multiplexing communication function of these communication functions. Also, data communication using two information channels (B channel) of ISDN is possible.

In FIG. 1, a system control unit 1 performs control processing of each unit of the video conference communication terminal, processing of an upper layer of the video conference communication, and various application programs provided in the video conference communication terminal. A ROM (Read Only Memory) 2 is a part of the control processing program executed by the system control unit 1 and is necessary for executing the control processing program. RAM (random access memory) 3 constitutes a work area of the system control unit 1 and the like.

The clock circuit 4 is for outputting current date and time information, and the magnetic disk device 5 is for storing system software, a plurality of application programs, a large number of user data, and the like.

The liquid crystal display device 6 is used as a display device in the telewriting communication function and also as a display unit when a user operates the video conference communication terminal device, and the touch panel device 7 is used.
Is provided on the display screen of the liquid crystal display device 6 and outputs coordinate data touched and touch state data.

The voice input / output device 8 is for inputting a voice for a call with a microphone and outputting it with a speaker. An analog voice signal input from the voice input / output device 8 with a microphone is output to a voice CODEC 9, and , The analog audio signal output from the audio input / output device 8 through the speaker is
The audio is output from the audio CODEC 9 and applied to the audio input / output device 8.

The audio CODEC 9 is for performing signal conversion processing of analog signal / digital data for transmitting an analog audio signal using the B channel of ISDN. Further, the voice control unit 10 includes the voice input / output device 8
This is for controlling the operation of.

The video camera device 11 is for taking a video image on the user side of the video conference communication terminal device, and the moving image signal output from the video camera device 11 is passed through the video synthesizing section 12 to a predetermined position. After being combined, the image is added to the video signal input end of the video CODEC 13 and the moving image signal input end of the display control unit 14. The video camera control unit 16 is for controlling operations such as shooting on / off, zooming in / zooming out, and panning of the video camera device 11.

The image synthesizing section 12 is a video camera device 11.
This is for converting the input analog NTSC format moving image signal into corresponding moving image data of digital data and for synthesizing a predetermined operation screen (described later) on the screen. Further, the contents of the composite screen and the ON / OFF switching control data of the composite operation are added from the system control unit 1.

The video CODEC 13 converts the input moving picture data into moving picture data in a predetermined CIF format, and further, converts it into TTC standard JT-H. In addition to encoding and compressing moving image information by the encoding method of H.261, converting the encoded and compressed moving image information into original CIF format moving image data, and converting the moving image data into NTSC format moving image data. To do.

The display control unit 14 includes a video monitor device 15
The display contents of the screen displayed on the screen are controlled by a command from the system control unit 1 to form display screen information of moving image data input from the video synthesizing unit 12 or the video CODEC 13, and the display screen information is converted to analog NTSC.
After being converted into a moving image signal of the format, the video monitor device 15
Output to

The ISDN interface circuit 17 has an I
In addition to being connected to the SDN, the ISDN layer 1 signal processing function and the integration / separation function of the D channel signal and the two B channel signals are provided, and the D channel signal is connected to the D channel transmission control unit 18. Also, the signals of the two B channels are exchanged with the multiplexer / demultiplexer 19.

The D channel transmission control section 18 has a D channel layer 2 signal processing function and a call control processing function for connecting / disconnecting one or two B channels.

The multiplexer / demultiplexer 19 multiplexes the data of a plurality of media such as voice, moving images, and general-purpose data exchanged using the B channel, and the TTC standard JT.
-H. In addition to forming frame data specified in H.221 and sending it to the line side, it separates data of a plurality of media multiplexed with the received frame data. The multiplexer / demultiplexer 19 exchanges audio data with the audio CODEC 9, exchanges moving image data with the video CODEC 13, and exchanges general-purpose data with the system control unit 1. .

The GSTN (general switching network) interface circuit 20 is for connecting to the GSTN to perform data communication, and has an automatic transmission / reception function. The push button signal generator 21 is for generating a predetermined push button signal, and its output signal is GSTN.
It is added to the transmission signal input terminal of the interface circuit 20. In addition, the push button signal detector 22 is GS
It is for detecting a push button signal received via the TN interface circuit 20.

These system control unit 1, ROM 2 and R
AM3, clock circuit 4, magnetic disk device 5, liquid crystal display 6, touch panel device 7, audio CODEC 9, audio control unit 10, video synthesizing unit 12, video CODEC 13, display control unit 14, video camera control unit 16, D channel transmission. The control unit 18, the multiplexer / demultiplexer 19, the GSTN interface circuit 20, the push button signal generator 21, and the push button signal detector 22 include an internal bus 23.
Data is exchanged between these respective elements mainly via the internal bus 23.

Further, on the operation screen of the touch panel device 7, as shown in FIG. 2, an operation panel for operating the photographing angle (camera angle) of the partner terminal is displayed. In addition, this operation panel displays the telephone number (I
It also serves as a numeric keypad for inputting SDN numbers, etc.

When an operation command for screen operation is received from the other terminal, for example, an operation screen as shown in FIG. 3 is formed, and the image combining unit 12 combines the operation screen with the screen to be transmitted. In this case, the command “4” is designated, and an instruction to perform a pan operation to the left is issued from the partner terminal, and the display content indicates that.

Now, in the video conference communication terminal device, in the B channel, the TTC standard JT-H. 221 is exchanged in a multi-frame format.

As shown in FIG. 4, one multi-frame MFL includes eight sub-multi-frames SMF1 to SMF.
8 in each sub-multiframe SMF1 to SMF1.
The SMF 8 is composed of two frames each. That is, one multi-frame MFL is composed of 16 frames FLM0 to FLM15.

Each frame FLM0 to FLM15
Consists of 80 octets of data, as shown in FIG. 5, and the respective bit positions where these octets are arranged in bit order constitute subchannels SCH1 to SCH8.

The 8th bit of the 1st octet to the 8th octet is the frame synchronization signal (Frame Ali).
The 8th bit of the 9th to 16th octets constitutes a bit rate allocation signal (Bit rate Allocation).
(Signal) BAS. Further, in the 17th to 24th octets of the subchannel SCH8, data of an encryption channel for exchanging key information for encrypting data and the like may be set (optional).

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

That is, even frames FLM0, FLM
2,..., FLM14, second to eighth octets, followed by odd frames FLM1, FLM3,.
The second octet of the FLM15 contains "0011011
A horizontal sync signal composed of an 8-bit data pattern "1" is arranged, and odd-numbered frames FLM1, FLM3, ...,
In the first octet of the FLM 11, a vertical synchronization signal composed of a 6-bit data pattern “001011” is arranged.

By detecting the horizontal synchronizing signal and the vertical synchronizing signal, the synchronization of one multi-frame MFL can be detected.

The 0th frame, the 2nd frame, the 4th frame
Bits N1, N2, N3, N4, and N5 of the first octet of the frame, the sixth frame, and the eighth frame are used to indicate a multiframe number. Of these, bit N5 is used to indicate whether a multi-frame number is used. As described above, since the data used for the multi-frame number is 4 bits, the multi-frame number changes in a descending order with values from 0 to 15, and the same multi-frame number appears every 16 multi-frames.

The tenth frame, the twelfth frame,
And the bit L of the first octet of the thirteenth frame
1, L2 and L3 are used to display connection numbers indicating the order of connection of the B channels carrying the frame among the B channels currently used. Also, bit R of the first octet of the fifteenth frame is reserved (reserved) for future recommendations,
Its value is set to 0.

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

Also, odd-numbered frames FLM1, FLM3
.., Bit A of the third octet of FLM 15 is used to indicate whether frame synchronization or multi-frame synchronization has been established, or whether synchronization has been lost.

Also, odd-numbered frames FLM1, FLM3
,..., The fifth octet, the sixth octet, the seventh octet, and the eighth octet of the FLM 15
C2, C3 and C4 are used to indicate a CRC (Cyclic Redundancy Check) code which is referred to for data error detection (ie, channel quality detection) of two consecutive frames (ie, sub-multiframes). The bit E of the fourth octet of the odd frames FLM1, FLM3,..., FM15 is used to indicate that a transmission error has been detected on the receiving side.

The bit rate allocation signal BAS is, as shown in FIG. 8, even-numbered frames FLM0, FLM2,
, FLM14, 8-bit data representing the capability BAS or BAS command is arranged, and the second frame of the odd-numbered frames FLM1, FLM3,.
The octet contains the capability BAS sent in the previous frame.
Alternatively, a double error correction code for correcting the value of the BAS command is provided.

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

That is, each frame FLM0 to FLM0
In the FLM 15, the first bit of the first octet is transmitted first, and the eighth bit of the 80th octet is transmitted last.

FIG. 10 is a T applied as a transmission control procedure executed when an audiovisual terminal such as a video conference communication terminal apparatus transmits data using the B channel.
TC standard JT-H. 242 shows an example of a general procedure of 242. 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.

First, the calling terminal makes a call to the destination terminal and performs a call setting procedure on the D channel to secure one B channel (hereinafter referred to as the first channel) (Phase A), Frame synchronization is performed while exchanging frame data in which PCM voice data (A-law or μ-law, 64 Kbps) is set on one channel (frame mode), and when frame synchronization is established, mutual capability BAS
Data and command BAS data are exchanged (phase B1-1), the transmission mode to be used at that time is determined, and an additional call setting request for securing the second B channel is started (phase B1-2). ).

Then, in principle, the modes having the highest functions common to each other are selected from the contents of the exchange of the transmission modes at that time (phase B1-3), and the calling terminal receives the selected operation mode. A BAS command specifying the receiving function of the terminal is transmitted to the calling terminal so that the receiving function is operated. In this case, if a BAS command in a mode different from the BAS command transmitted by the calling terminal is received, the BAS command is received. The BAS command is transmitted again, the transmission mode is made to match the reception mode, and the parameters common to the device functions of the calling terminal and the called terminal are set (Phase B
2). Thus, in the first channel, for example, audio data (16
Kbps) and video data (4
Data transmission of 6.4 Kbps) is performed (phase C).

When the first channel starts data transmission in the frame mode, the call setup procedure is performed on the second B channel (hereinafter referred to as the second channel) on the D channel (phase CA), and the second channel is established. Then, frame data including only the frame synchronization signal FAS and the bit allocation signal BAS is exchanged using the second channel to establish frame synchronization and multi-frame synchronization (phase CB1-11), and then the first channel and the second channel. Synchronization between channels is established (phase CB1-12).

When the synchronization of the two B channels is completed, the 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). ), And setting common parameters (phase CB2). The transmitted B
When a BAS command in a mode different from the AS command is received, the received BAS command is transmitted again, the transmission mode is switched so that the transmission mode matches the reception mode, and common parameters are set.

When the initialization of the second channel is completed in this way, after that, the frame data exchanged in the first channel and the frame data exchanged in the second channel are synchronized with each other. Using the B channel, for example, audio data and moving image data are 56 Kbps and 68.8 Kbps, respectively.
The data transmission is performed by allocating the transmission rate of
reference).

To end such data transmission, first, the second channel is disconnected. At this time, the first
A procedure for setting a common mode is performed for voice data transmission performed only on the channel (phase CD).
1) The mode of the second channel is switched to the mode 0F of the frame mode (phase CD2). At this time, the first channel and the second channel are asynchronous, and the second channel is in a state where a call is held in a transmission state of only the frame synchronization signal FAS and the bit allocation signal BAS, and the call disconnection of the D channel is performed. The call on the second channel can be released by the release procedure.

In the first channel, phase CD1
During the phase CD2 and the phase CD2, the audio data is transmitted in the frame mode at the transmission rate of 56 Kbps, the transmission of the moving image data is stopped, and when the operator of one terminal ends the communication, the mode is switched to the mode 0F (phase D2). Then, the call of the first channel can be released by the call disconnection / release procedure of the D channel.

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

As described above, in an audiovisual terminal such as a video conference communication terminal device, one B channel (first channel) is first secured and a frame mode is established, and then audio data and a moving image are transmitted on this first channel. If the second B channel (second channel) can be set at the same time while assigning the data transmission rate and performing the data transmission in the transient mode, the second channel is set by the D channel call setup procedure. Secure. Then, the first channel transmitting in the transient mode is synchronized with the newly secured second channel, and when the channel synchronization is established, the transmission speed of the audio data and the moving image data is reset. Then, by utilizing the increased transmission capacity of the B channel, higher quality voice data and moving image data are exchanged.

When the data transmission is completed, the mode in which the transmission path is used while the first channel and the second channel are both synchronized is changed to the mode in which only the first channel is used. There is a need. Therefore, first, while maintaining the transmission speed of the audio data at the transmission rate of 56 Kbps, the transmission of the moving image data is stopped and the transmission mode is changed to the transmission mode of only the first channel, while the synchronization state of the second channel with the first channel is changed. At the same time, the mode is shifted to mode 0F in which the user data is in an idle transmission state, and the call is disconnected / released by the D-channel call release procedure. After the first channel is changed to the mode 0F, the call is disconnected / released by the call disconnection / release procedure of the D channel. In addition, the billing information obtained in the call disconnection release procedure,
It can be managed for each channel.

In this embodiment, the terminal which is the calling side when the video conference communication is started makes a call to the partner terminal using GSTN, and the video camera device 11 of the partner terminal shoots using GSTN. I am trying to exchange commands to operate angles.

FIG. 11 shows an example of processing of the calling terminal in this case.
Shown in

A call is made to the partner terminal (process 101) and waits until the partner terminal answers the incoming call (NO loop of decision 102). The other terminal answers the incoming call and the result of judgment 102 is Y
When it becomes ES, the push button signal generator 2 generates a multi-digit number string constituting a predetermined password.
Input to 1 and push button signal generator 21
Push button signal (PW) corresponding to the password
Is transmitted (process 103).

In this way, when the call is established with the partner terminal and the password is sent, whether the user of the own terminal has operated the shooting angle of the partner terminal or receives a push button signal from the partner terminal. The content signal is output from the push button signal detector 22, or
It waits until the GSTN interface circuit 20 notifies that the partner terminal has hooked the GSTN (NO loop of decisions 104, 105, 106).

When the user of the own terminal operates the photographing angle of the other terminal and the result of determination 104 is YES, the contents of the command (key) input at that time are set to the push button signal generator 21. , And the push button signal generator 21 sends out a push button signal (command) corresponding to the command (process 107), and returns to the determination 104.

Further, a push button signal is received from the partner terminal, and the content signal is the push button signal detector 2.
2 is output, and when the result of determination 105 is YES, the content of the received command is analyzed (process 108), and the video camera control unit 16 controls the video camera device 11 according to the analysis result. The shooting angle and the like are operated (process 109), and the process returns to the determination 104. Also,
At this time, an operation screen showing the operation content is formed, and the image combining unit 12 combines the operation screen with the screen to be transmitted.

Further, when the GSTN interface circuit 20 notifies that the partner terminal has hooked the GSTN, and the result of the judgment 106 is YES, the GSTN interface circuit 20 causes the GSTN
Is restored (process 110), and this process ends.

FIG. 12 shows an example of processing of the called terminal in this case.

The incoming call terminal waits until the GSTN interface circuit 20 detects an incoming call (decision 201).
(NO loop), if the GSTN interface circuit 20 detects an incoming call and the result of judgment 201 is YES, the incoming call is answered (process 202) and waits until a push button signal is received from the partner terminal (decision 203).

When the push button signal is received from the partner terminal and the result of determination 203 is YES, it is authenticated whether the content of the received push button signal matches the predetermined password (Process 20).
4) If the passwords do not match (decision 20)
The result of 5 is NO, and the GSTN is restored (process 20).
6) Return to the decision 201.

If the passwords match, the determination 205
If the result is YES, the system waits until the push button signal is received, the user of the terminal operates the shooting angle of the partner terminal, or the partner terminal goes on-hook (determination 207, 208, 209). NO loop).

When a push button signal is received from the partner terminal and the result of judgment 207 is YES,
The content of the received command is analyzed (process 210),
In accordance with the analysis result, the video camera control unit 16 operates the shooting angle and the like of the video camera device 11 (process 211) and returns to the determination 207. At this time, an operation screen showing the operation content is formed, and the image combining unit 12 combines the operation screen with the screen to be transmitted.

When the user of the own terminal operates the photographing angle of the other terminal, the result of judgment 208 is YE.
When S, the contents of the command (key) input at that time are input to the push button signal generator 21, and the push button signal (command) corresponding to the command is sent from the push button signal generator 21. Then (process 212), the process returns to the determination 207.

If the other terminal goes on-hook with GSTN and the result of judgment 209 is YES,
The process proceeds to step 206, the GSTN is restored, and the process returns to the determination 201.

Thus, in this embodiment, the GS is separately provided.
A push button signal is exchanged with the partner terminal via the TN, whereby the video camera device 1 of the partner terminal is exchanged.
Since you can operate the shooting angle of 1 etc.,
The user can operate the shooting angle desired by himself while confirming the display contents of the video monitor device 15, and the operability is greatly improved.

Further, since the operation contents are combined and displayed on the screen to be transmitted to the partner terminal, the user operating the video camera device 11 can confirm the operation contents and assist the user's operation. Can be done effectively.

Since the other terminal is authenticated with the password, when a call is made from a terminal other than the communicating terminal,
The line can be restored immediately, useless communication can be performed, and communication that is not affected by an unauthorized command received from an unauthorized partner terminal can be performed.

By the way, in the above-described embodiment, since the GSTN is separately required to change the photographing angle of the video camera device 11 of the partner terminal, the cost for the line equipment is high.

FIG. 13 shows a video conference communication terminal device according to another embodiment of the present invention which can solve such a problem. In the figure, the same parts as those in FIG. 1 and corresponding parts are denoted by the same reference numerals.

In the figure, the system control unit 1 controls the respective parts of the video conference communication terminal device, processes of the upper layer of the video conference communication, and various application programs included in the video conference communication terminal device. The ROM (Read Only Memory) 2 is necessary for executing a part of the control processing program executed by the system control unit 1 and for executing the control processing program. RAM (random access memory) 3 constitutes a work area of the system control unit 1 and the like.

The clock circuit 4 is for outputting current date and time information, and the magnetic disk device 5 is for storing system software, a plurality of application programs, a large number of user data, and the like.

The liquid crystal display device 6 is used as a display device in the telewriting communication function and is also used as a display unit when the user operates the video conference communication terminal device, and the touch panel device 7 is used.
Is provided on the display screen of the liquid crystal display device 6 and outputs coordinate data touched and touch state data.

The microphone 25 is for inputting voice for a call, and its output signal is applied to one input end of the mixer circuit 26. The push button signal generator 21 generates a predetermined push button signal, and its output signal is applied to the other input end of the mixer circuit 26.

The mixer circuit 26 mixes the output signal of the microphone 25 and the output signal of the push button signal generator 21, and the output signal is added to the audio signal input terminal of the audio CODEC 9. The audio output signal output from the audio CODEC 9 is amplified by the amplifier 27 and then applied to the push button signal detector 22 and the speaker 28. Voice CODEC9 is ISD
This is for performing signal conversion processing of analog signal / digital data for transmitting an analog audio signal using N B channels.

The video camera device 11 is for taking a video image on the user side of the video conference communication terminal device, and the moving image signal output from the video camera device 11 is passed through the video synthesizing unit 12 to a predetermined value. After being combined, the image is added to the video signal input end of the video CODEC 13 and the moving image signal input end of the display control unit 14. The video camera control unit 16 is for controlling operations such as shooting on / off, zooming in / zooming out, and panning of the video camera device 11.

The video synthesizing unit 12 is a video camera device 11
This is for converting the inputted analog NTSC format moving image signal into corresponding moving image data of digital data and for synthesizing a predetermined operation screen on the screen. Further, the contents of the composite screen and the ON / OFF switching control data of the composite operation are added from the system control unit 1.

The video CODEC 13 converts the input moving picture data into moving picture data in a predetermined CIF format, and further, the TTC standard JT-H. In addition to encoding and compressing moving image information by the encoding method of H.261, converting the encoded and compressed moving image information into original CIF format moving image data, and converting the moving image data into NTSC format moving image data. To do.

The display control unit 14 includes a video monitor device 15
The display contents of the screen displayed on the screen are controlled by a command from the system control unit 1 to form display screen information of moving image data input from the video synthesizing unit 12 or the video CODEC 13, and the display screen information is converted to analog NTSC.
After being converted into a moving image signal of the format, the video monitor device 15
Output to

The ISDN interface circuit 17 uses the I
In addition to being connected to the SDN, the ISDN layer 1 signal processing function and the integration / separation function of the D channel signal and the two B channel signals are provided, and the D channel signal is connected to the D channel transmission control unit 18. Also, the signals of the two B channels are exchanged with the multiplexer / demultiplexer 19.

The D channel transmission control section 18 has a layer 2 signal processing function of the D channel and a call control processing function for connecting / disconnecting one or two B channels.

The multiplexer / demultiplexer 19 multiplexes the data of a plurality of media such as voice, moving images, and general-purpose data exchanged using the B channel, and executes the TTC standard JT.
-H. In addition to forming frame data specified in H.221 and sending it to the line side, it separates data of a plurality of media multiplexed with the received frame data. The multiplexer / demultiplexer 19 exchanges audio data with the audio CODEC 9, exchanges moving image data with the video CODEC 13, and exchanges general-purpose data with the system control unit 1. .

These system control unit 1, ROM 2 and R
AM3, clock circuit 4, magnetic disk device 5, liquid crystal display 6, touch panel device 7, audio CODEC 9, audio control unit 10, video synthesizing unit 12, video CODEC 13, display control unit 14, video camera control unit 16, D channel transmission. Controller 18, multiplexing / demultiplexing device 19, push button signal generator 21, and push button signal detector 22
Are connected to the internal bus 23, and data is exchanged between these respective elements mainly via the internal bus 23.

FIG. 14 shows an example of processing relating to operation control of the photographing angle in this case.

First, communication is in progress, and the process waits until a push button signal is received from the partner terminal or the user of the own terminal operates the shooting angle of the partner terminal (NO in decisions 301, 302 and 303). loop).

When the user of the own terminal operates the shooting angle of the other terminal and the result of the judgment 303 is YES, a predetermined password and
The push button signal generator 21 is made to input the information in which the contents of the command (key) inputted at that time are connected,
From the push button signal generator 21, a push button signal (PW + command) corresponding to the command is transmitted (process 304), and the process returns to judgment 301.

When a push button signal is received from the partner terminal and the result of determination 302 is YES, the password portion of the received push button signal number string matches the predetermined password. Authentication is performed (process 305), and if the passwords match (the result of determination 306 is YE
S), the remaining part of the received push button signal is extracted as a command, the content of the command is analyzed (process 307), and the video camera control unit 16 causes the video camera device 11 to capture the shooting angle according to the analysis result. Etc. are operated (process 308) and the process returns to the judgment 301. At this time, an operation screen showing the operation content is formed, and the image combining unit 12 combines the operation screen with the screen to be transmitted. Further, when the bus word portion of the received push button signal does not match and the result of determination 306 is NO, the push button signal received at that time is ignored and determination 301
Return to

If the result of judgment 301 is NO when communication is not in progress, this operation is terminated.

In this way, in this embodiment, the operation of returning the shooting angle of the video camera device 11 of the other terminal can be performed using the audio channel used in the video conference communication session. Communication costs can be limited as much as possible. In addition, since the command and password are sent each time and the password is used for authentication, it is possible to avoid a situation where an illegal operation is performed.

FIG. 15 shows a video conference communication terminal device according to still another embodiment of the present invention. In the figure, the same parts as those in FIG. 13 and corresponding parts are designated by the same reference numerals.

In the figure, the system control unit 1 controls the respective units of the video conference communication terminal device, processes of upper layers of the video conference communication, and various application programs included in the video conference communication terminal device. The ROM (Read Only Memory) 2 is necessary for executing a part of the control processing program executed by the system control unit 1 and for executing the control processing program. RAM (random access memory) 3 constitutes a work area of the system control unit 1 and the like.

The clock circuit 4 is for outputting current date and time information, and the magnetic disk device 5 is for storing system software, a plurality of application programs, a large number of user data, and the like.

The liquid crystal display device 6 is used as a display device in the telewriting communication function and also as a display unit when the user operates the video conference communication terminal device, and the touch panel device 7 is used.
Is provided on the display screen of the liquid crystal display device 6 and outputs coordinate data touched and touch state data.

The microphone 25 is for inputting voice for a telephone call, and its output signal is applied to one input end of the mixer circuit 26 via the connector 30.
The telephone 32 generates a predetermined push button signal, and its output signal is applied to the other input end of the mixer circuit 26 via a connector 33 (a modular jack and a modular connector). Mixer circuit 26
Mixes the output signal of the microphone 25 and the output signal of the push button signal generator 21, and the output signal is applied to the audio signal input end of the audio CODEC 9 via the connector 34. Also, in this case, the microphone 2
5, mixer circuit 26, telephone 32, connectors 31, 3
Reference numerals 2, 33 and 34 constitute a voice input unit 35 which is separate from the video conference communication terminal device.

The audio output signal output from the audio CODEC 9 is amplified by the amplifier 27 and then applied to the push button signal detector 22 and the speaker 28. The audio CODEC 9 is for performing signal conversion processing of analog signal / digital data for transmitting an analog audio signal using the ISDN B channel.

The video camera device 11 is for taking a video image on the user side of the video conference communication terminal device, and the moving image signal output from the video camera device 11 is passed through the video synthesizing section 12 to a predetermined value. After being combined, the image is added to the video signal input end of the video CODEC 13 and the moving image signal input end of the display control unit 14. The video camera control unit 16 is for controlling operations such as shooting on / off, zooming in / zooming out, and panning of the video camera device 11.

The image synthesizing section 12 is a video camera device 11.
This is for converting the inputted analog NTSC format moving image signal into corresponding moving image data of digital data and for synthesizing a predetermined operation screen on the screen. Further, the contents of the composite screen and the ON / OFF switching control data of the composite operation are added from the system control unit 1.

The video CODEC 13 converts the input moving picture data into moving picture data in a predetermined CIF format, and further, the TTC standard JT-H. In addition to encoding and compressing moving image information by the encoding method of H.261, converting the encoded and compressed moving image information into original CIF format moving image data, and converting the moving image data into NTSC format moving image data. To do.

The display control unit 14 includes a video monitor device 15
The display contents of the screen displayed on the screen are controlled by a command from the system control unit 1 to form display screen information of moving image data input from the video synthesizing unit 12 or the video CODEC 13, and the display screen information is converted to analog NTSC.
After being converted into a moving image signal of the format, the video monitor device 15
Output to

The ISDN interface circuit 17 uses the I
In addition to being connected to the SDN, the ISDN layer 1 signal processing function and the integration / separation function of the D channel signal and the two B channel signals are provided, and the D channel signal is connected to the D channel transmission control unit 18. Also, the signals of the two B channels are exchanged with the multiplexer / demultiplexer 19.

The D channel transmission control section 18 has a D channel layer 2 signal processing function and a call control processing function for connecting / disconnecting one or two B channels.

The multiplexer / demultiplexer 19 multiplexes the data of a plurality of media such as voice, moving images, and general-purpose data exchanged using the B channel, and executes the TTC standard JT.
-H. In addition to forming frame data specified in H.221 and sending it to the line side, it separates data of a plurality of media multiplexed with the received frame data. The multiplexer / demultiplexer 19 exchanges audio data with the audio CODEC 9, exchanges moving image data with the video CODEC 13, and exchanges general-purpose data with the system control unit 1. .

These system control unit 1, ROM 2 and R
AM3, clock circuit 4, magnetic disk device 5, liquid crystal display 6, touch panel device 7, audio CODEC 9, audio control unit 10, video synthesizing unit 12, video CODEC 13, display control unit 14, video camera control unit 16, D channel transmission. The control unit 18, the multiplexer / demultiplexer 19, and the push button signal detector 22 are connected to an internal bus 23, and data exchange between these elements is performed mainly via the internal bus 23. Be seen.

In this way, in the present embodiment, the existing telephone 32 can be used as the push button signal generating means, which is convenient.

By the way, in each of the above-mentioned embodiments, one to one
Although the video conference communication is performed in the communication form of, the video conference communication can be performed by the multipoint communication service in which a plurality of video conference communication terminals are connected.

In this case, as shown in FIG. 16, each of the video conference communication terminals T1 to Tn makes a call to the multipoint control unit MCU which provides the multipoint communication service to establish a call. The point control unit MCU delivers audio information, video information, and general-purpose data,
A multipoint communication session is conducted.

FIG. 17 shows an example of a schematic configuration of the multipoint control unit MCU.

In the figure, the n communication channel units CU1 to CUn represent the multipoint control unit MCU as an ISDN.
The video conference communication terminal device, which is a participating terminal, is connected to each of the video conference communication terminal devices, and a predetermined media multiplex communication process is performed with each video conference communication terminal device. It has a function to multiplex / separate moving image transmission / reception data and general-purpose data. In addition, an audio input signal AAI1 is transmitted between the communication channel units CU1 to CUn and the audio data processing unit AU.
-AAIn and audio output signals AAO1 to AAOn are exchanged, and the video input signal AVI is transmitted between the communication channel units CU1 to CUn and the video data processing unit VU.
1-AVIn and moving image output signals AVO1-AVOn are exchanged, and input general-purpose data D is input between the communication channel units CU1-CUn and the general-purpose data processing unit DU.
DI1 to DDIn and output general data DDO1 to DD
On is exchanged.

The audio data processing unit AU has the audio data D input from the communication channel units CU1 to CUn.
Audio output signals AAO1 to be output to the respective communication channel units CU1 to CUn based on AI1 to DAIn
To form AAOn. At this time, the respective audio output signals AAO1 to AAOn are formed in a state where the other audio input signals AAI1 to AAIn excluding the audio input signals AAI1 to AAIn input from the transmission destination communication channel units CU1 to CUn are mixed. .

The moving image data processing unit VU outputs moving image output signals AVO to the respective communication channel units CU1 to CUn based on the moving image input signals AVI1 to AVIn input from the communication channel units CU1 to CUn.
1 to AVOn are formed.

The general-purpose data processing unit DU is the general-purpose data D input from the communication channel units CU1 to CUn.
General-purpose data DPO1 to be output to the respective communication channel units CU1 to CUn based on PI1 to DPIn
It forms DPOn. For example, when one video conference terminal device transmits facsimile image data to another video conference terminal device, the general-purpose data input from the transmission source video conference terminal device is sent to the other video conference terminal device. Send each.

The system control unit SCU includes communication channel units CU1 to CUn, a voice data processing unit AU,
It exchanges various control information with the moving image data processing unit VU and the general-purpose data processing unit DU to control the operation of each of these elements. The maintenance console device CON is for performing various operations for maintenance work of the multipoint control unit MCU.

Communication channel unit CU (CU1 to CU
FIG. 18 shows an example of n).

In the figure, the ISDN interface circuit 40 connects this communication channel unit CU to the ISDN, and also provides a signal processing function of layer 1, a signal of D channel (signal channel) and two B channels (information channel). It has a signal integration / separation function,
The D channel signal is exchanged with the D channel transmission control unit 41, and the two B channel signals are multiplexed / multiplexed.
It communicates with the separation control device 42.

The D-channel transmission control unit 41 has a call control procedure function for a signal channel and a multiple call control function. The multiplexing / demultiplexing control unit 42 is an ITU.
-T Recommendation H. 221 is provided with a data multiplexing / separation function conforming to 221 and a data frame synchronization function, and digital audio data,
Digital moving image data and general-purpose data are added, and the connection end on the multiplexing side is connected to the ISDN interface circuit 40.

The audio output signal AAO input from the audio data processing unit AU is applied to one input end of the mixer circuit 43. The push button signal generator 44 is
A predetermined push button signal is generated in response to a command from the system control unit SCU, and its output signal is
It is added to the other input terminal of the mixer circuit 43.

The mixer circuit 43 outputs the audio output signal AAO.
And the output signal of the push button signal generator 44 are mixed, and the output signal is applied to the audio signal input end of the audio CODEC 45.

The audio output signal output from the audio CODEC 45 is amplified by the amplifier 46 and then added to the push button signal detector 47. At the same time, the audio output signal is output as the audio input signal AAI.
Is output to The audio CODEC 45 is the mixer circuit 43.
Of the output signal is converted to corresponding digital audio data and output to the multiplexer / demultiplexer 27, and received digital audio data output from the multiplexer / demultiplexer 27 is converted to corresponding analog audio signal and output. It is a thing.

The moving picture CODEC 48 converts the moving picture output signal AVO input from the moving picture data processing unit VU into corresponding digital video data, converts the data format of the digital video data from RGB format to YUV format, and after the conversion. The digital video data is converted into a predetermined CIF format or QCIF type video data, and ITU-T Recommendation H.264 is used. The video information is encoded and compressed by the encoding method of H.261 to output the video information to the multiplexer / demultiplexer 27, and the received video information output from the multiplexer / demultiplexer 27 is decoded to the original. CIF or QCIF
Converted to model video data, and convert the video data to YU
Data conversion from the V format to the RGB format, the data is converted into a corresponding analog video signal, and a video input signal AVI
Is output to the moving image data processing unit VU.

The multiplexer / demultiplexer 42 also exchanges signals of the general-purpose data channel with the general-purpose data processing unit DU.

In this case, the video conference communication terminals T1 to Tn.
The same structure as that shown in FIG. 13 is used.

In this case, FIG. 19 shows an example of the processing executed by the multipoint control unit MCU for the operation of the photographing angle of the video camera unit.

First, one of the video conference communication terminals T1
To receive a push button signal from Tn (NO loop of decision 401), and when the push button signal is received from any of the video conference communication terminals T1 to Tn and the result of decision 401 is YES. Authenticates whether the password part of the received push button signal number string matches the predetermined password (process 402), and if the passwords match, the result of judgment 403 is YES. , The video conference communication terminals T1 to T detected as speaker terminals at that time
The remaining part of the received push button signal is sent to n as a command (process 404) and the process returns to the step 401.

When the bus word portion of the received push button signal does not match and the result of judgment 403 is NO, the push button signal received at that time is ignored and the process returns to judgment 401. .

Also, in this case, regarding the operation of the photographing angle of the video camera device, the video conference communication terminals T1 to T
FIG. 20 shows an example of the process executed by n.

First, the multipoint control unit MC is in communication.
It waits until a push button signal is received from U or the user of the own terminal operates the shooting angle of the other terminal (NO loop of determinations 501, 502, and 503).

When the user of the own terminal operates the photographing angle of the other terminal and the result of determination 503 is YES, a predetermined password and
The push button signal generator 21 is made to input the information in which the contents of the command (key) inputted at that time are connected,
A push button signal (PW + command) corresponding to the command is sent from the push button signal generator 21 (process 504), and the process returns to the determination 501.

When a push button signal is received from the multipoint control unit MCU, the result of judgment 502 is YE.
When S is reached, the content of the command corresponding to the received push button signal is analyzed (process 505), and the video camera control unit 16 operates the shooting angle of the video camera device 11 according to the analysis result (process 505). Fifty
6) Return to decision 501. At this time, an operation screen showing the operation content is formed, and the image combining unit 12 combines the operation screen with the screen to be transmitted.

When the communication is not in progress and the result of determination 501 is NO, this operation is ended.

In this way, in the present embodiment, even when a multipoint communication session using the multipoint control unit MCU is being conducted, each of the video conference communication terminals T1 to T is at that time.
It is possible to operate the shooting angle of the video camera device with respect to the speaker terminal which is shooting the moving image distributed to n.

In each of the above-described embodiments, the push button signal is used as the signal used for operating the shooting angle of the video camera device, but an appropriate tone signal other than this is used. Good.

[0138]

As described above, according to the present invention,
Since push button signals are separately exchanged with the partner terminal via the GSTN, and thereby the shooting angle of the video camera device of the partner terminal can be operated, the operability of the shooting angle is significantly improved. Get the effect.

Further, since the operation contents are combined and displayed on the screen to be transmitted to the partner terminal, the user operating the video camera device can confirm the operation contents and assist the user's operation. There is also an effect that it can be effectively performed.

Also, since the push button signal is exchanged with the partner terminal by using the voice channel in communication, the shooting angle of the video camera device of the partner terminal can be operated. The operability of the angle is significantly improved and the communication cost can be reduced.

Further, even when a multipoint communication session using the multipoint control device is being conducted, the video camera device is used for the terminal which is shooting the moving image distributed to each video conference communication terminal at that time. The effect that the shooting angle can be operated is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a video conference communication terminal device according to an embodiment of the present invention.

FIG. 2 is a schematic view showing an example of an operation panel for operating a shooting angle (camera angle) of a partner terminal.

FIG. 3 is a schematic diagram showing an example of an operation screen to be combined with a transmitted image.

FIG. 4 is a schematic diagram showing an example of a frame configuration of a multi-frame.

FIG. 5 is a schematic diagram showing an example of a signal configuration of one frame.

FIG. 6 is a schematic diagram showing an example of a frame synchronization signal.

FIG. 7 is a schematic diagram showing an example of a bit allocation signal.

FIG. 8 is a schematic diagram for explaining a signal transmission order.

FIG. 9 shows TTC recommendation JT-H. 242 is a time chart showing a general procedure example of H.242.

FIG. 10 is a schematic diagram showing an example of allocation of transmission capacities to audio data, general-purpose data, and moving image data in data transmission using two B channels.

FIG. 11 is a flowchart showing an example of processing of a calling terminal.

FIG. 12 is a flowchart showing an example of processing of a called terminal.

FIG. 13 is a block diagram showing the configuration of a video conference communication terminal device according to another embodiment of the present invention.

FIG. 14 is a flowchart showing another example of processing related to operation control of a shooting angle.

FIG. 15 is a block diagram showing a video conference communication terminal device according to still another embodiment of the present invention.

FIG. 16 is a schematic block diagram showing an example of a multipoint communication system.

FIG. 17 is a block diagram showing an example of a schematic configuration of a multipoint control device.

FIG. 18 is a block diagram showing an example of the configuration of a communication channel unit.

FIG. 19 is a flowchart showing an example of processing executed by the multipoint control device regarding an operation such as a shooting angle of the video camera device.

FIG. 20 is a flowchart showing an example of processing executed by the video conference communication terminal regarding an operation such as a shooting angle of the video camera device.

[Explanation of symbols]

 1 System Control Unit 11 Video Camera Device 16 Video Camera Control Unit 20 GSTN Interface Circuit 21,44 Push Button Signal Generator 22,47 Push Button Signal Detector 26,43 Mixer Circuit 32 Telephone

Claims (8)

[Claims] 1. A videoconference communication terminal apparatus having a videoconference communication function for communicating at least video information, audio information, and general-purpose data in a multiplexed state using ISDN as a transmission path. Switching network interface means, tone signal generating means for transmitting a predetermined tone signal to the general switching network via the general switching network interface means, and detection of the tone signal received via the general switching network interface means A tone signal detecting means for establishing a call is established, and a call is established between the other terminal with which the call is established via ISDN through the general exchange network by the above general exchange network interface means, and the call is received from the other terminal. When operating the shooting mode of moving image information, it corresponds to the predetermined operation code corresponding to the operation content. While the tone signal is transmitted to the partner terminal by the tone signal generating means, the tone signal detecting means detects the tone signal, and if the detected content corresponds to the predetermined operation code, A video conference communication terminal device, wherein a video camera device is operated in a shooting mode corresponding to an operation code. 2. A videoconference communication terminal device having a videoconference communication function for communicating at least video information, audio information, and general-purpose data in a multiplexed state using ISDN as a transmission path, wherein a general exchange network is accommodated. Switch network interface means, push button signal generating means for transmitting a predetermined push button signal to the general exchange network via the general exchange network interface means, and push button signal received via the general exchange network interface means. A push button signal detecting means for detecting a call, and the general exchange network interface means establishes a call with the other terminal with which the call has been established via the ISDN, and the other terminal When operating the shooting mode of video information received from While the push button signal corresponding to the predetermined operation code is sent to the partner terminal by the push button signal generation means, the push button signal detection means detects the push button signal, and the detected content is the predetermined operation code. A video conference communication terminal device, characterized in that, when the contents are compatible, the video camera device is operated in a shooting mode corresponding to the operation code. 3. A predetermined tone signal is generated in a video conference communication terminal device having a video conference communication function for communicating at least video information, audio information, and general-purpose data in a multiplexed state using ISDN as a transmission path. A tone signal generating means, a mixer circuit for mixing the transmitted voice signal and the tone signal generated by the tone signal generating means, and a tone signal detecting means for detecting the tone signal from the received voice signal, and receiving from the partner terminal When operating the shooting mode of the moving image information, the tone signal generating means generates the tone signal corresponding to a predetermined operation code corresponding to the operation content and sends the tone signal to the partner terminal, while the tone signal detecting means operates. If the tone signal is detected and the detected content corresponds to the predetermined operation code, the Teleconference communication terminal apparatus characterized by operating the video camera device to the imaging mode corresponding to the work code. 4. A videoconference communication terminal device having a videoconference communication function for communicating at least video information, audio information, and general-purpose data in a multiplexed state using ISDN as a transmission path, and generating a predetermined push button signal. A push button signal generating means, a mixer circuit for mixing the transmission voice signal and the push button signal generated from the push button signal generating means, and a push button signal detecting means for detecting the push button signal from the reception voice signal, When operating the shooting mode of the moving image information received from the partner terminal, a push button signal corresponding to a predetermined operation code corresponding to the operation content is generated from the push button signal generating means and transmitted to the partner terminal, The push button signal detection means detects the push button signal, If out contents are contents corresponding to the predetermined operation code, video conference communication terminal apparatus characterized by operating the video camera device to the imaging mode corresponding to the operation code. 5. The video conference communication terminal device according to claim 2, wherein the push button signal generating means uses an external telephone connectable to the device body. 6. The shooting screen of the video camera device includes:
The operation screen for displaying the operation content received from the partner terminal is combined, and the operation screen is combined.
Alternatively, the video conference communication terminal device according to claim 3, claim 4, or claim 5. 7. A call is established with a plurality of video conference communication terminal devices having a video conference communication function for communicating in a state in which at least moving image information, audio information and general-purpose data are multiplexed using ISDN as a transmission path, and a predetermined call is established. In the multipoint control device for processing the multipoint control function, the tone signal generating means for generating a predetermined tone signal, the transmission voice signal and the tone signal generating means for each of the video conference communication terminal devices that have established a call. The mixer circuit that mixes the generated tone signals and the tone signal detection means that detects the tone signals from the received voice signal, the tone signal detection means detects the tone signals, and the detected content is the received moving image. When the content corresponds to a predetermined operation code for operating the shooting mode of the information, the source of the video information is specified at that time. Levi conference to via through-terminal, multi-point control unit, characterized in that said tone signal corresponding to a predetermined operation code corresponding to the received operation content sent by generating from said tone signal generating means. 8. A call is established with a plurality of video conference communication terminal devices having a video conference communication function for communicating in a state where at least moving image information, audio information and general-purpose data are multiplexed using ISDN as a transmission line, and a predetermined call is established. In the multipoint control device for processing the multipoint control function, the pushbutton signal generating means for generating a predetermined pushbutton signal, the transmission voice signal, and the pushbutton signal for each videoconference communication terminal device that has established a call. A mixer circuit that mixes the push button signal generated from the generating means and a push button signal detecting means that detects the push button signal from the received audio signal are provided, and the push button signal detecting means detects the push button signal. , A predetermined operation code for operating the shooting mode of the moving image information whose detection content is received. If the content corresponds to, the push button signal corresponding to the predetermined operation code corresponding to the received operation content is pushed to the specific video conference history terminal device of the distribution source of the video information at that time. A multipoint control device characterized in that it is generated from a button signal generating means and transmitted.