JPH0879407A - Multimedia terminal equipment - Google Patents

Abstract

PURPOSE: To reduce a space for installation and to improve an effect for preventing the transfer of images or the like by displaying moving image information outputted from a video camera of an interphone system on the video display device of the multimedia terminal equipment. CONSTITUTION: When the call switch of an interphone system 8 is turned on, a display mode for preparing a slave picture in a prescribed area (a 1/4 area at the lower right position, for example,) on the display screen of a video monitor device 19 is set to a display control part 11. Thus, a picture photographed by the interphone system 8 is displayed on the slave screen formed on the video monitor device 19. Next, a system control part 1 connects a voice input/ output device 12 and the interphone system 8 while using a switcher 9 and the state of enabling speaking through a microphone 33 and a speaker 34 of the interphone system 8 is set by using the voice input device 12. Thus, a user can talk with a visitor through the interphone system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia communication function means for exchanging at least moving picture information and sound information, a video display means for displaying and outputting the received moving picture information, and input / output of sound information. The present invention relates to a multimedia terminal device having a voice input / output unit for

[0002]

2. Description of the Related Art An intercom system has been put into practical use, which is equipped with a small video camera device for taking a picture of the state of the outdoors so that the state of visitors can be confirmed on a screen displayed on a video monitor.

With such an intercom system, for example, a situation such as a visitor who cannot be confirmed through a peephole provided at the entrance door can be seen on the display screen of the video monitor device, which is effective in crime prevention.

[0004]

However, in the conventional apparatus as described above, it is basically necessary to provide a video monitor apparatus for the intercom apparatus in the house, and it is necessary to secure an installation place therefor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a multimedia terminal device which can be used also as a video monitor device for an intercom device.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a multimedia communication function means for exchanging at least moving picture information and sound information, a video display means for displaying and outputting the received moving picture information, and an input of the sound information. In a multimedia terminal device having a first audio input / output unit for outputting, an intercom device having at least a calling switch, a video camera, and a second audio input / output unit, and a calling switch of the intercom device are turned on. When operated, the moving image information output from the video camera is displayed on the video display means, and the control means connects the first audio input / output means to the second audio input / output means. Is.

[0007] Also, a multimedia communication function means for exchanging at least moving image information and audio information,
In a multimedia terminal device comprising video display means for displaying and outputting the received moving picture information and first audio input / output means for inputting / outputting audio information, at least a call switch, a video camera, and a second When the intercom device having the voice input / output means and the call switch of the intercom device are turned on, a transfer destination stored in advance is called, and a moving image output from the video camera is transmitted to the transfer destination. A control means for transmitting information and for exchanging voice information using the second voice input / output means is provided.

[0008] Also, a multimedia communication function means for exchanging at least moving image information and audio information,
In a multimedia terminal device comprising video display means for displaying and outputting the received moving picture information and first audio input / output means for inputting / outputting audio information, at least a call switch, a video camera, and a second When the call switch of the intercom device is turned on while multimedia communication is being performed between the intercom device having the voice input / output means and any of the other terminals, the video display means at that time. A predetermined sub-screen is formed at a predetermined position on the display screen, the moving picture information output from the video camera is displayed on the sub-screen, and the first audio input / output unit is connected to the second audio input / output unit. It is provided with a control means for connecting to.

[0009]

Therefore, since the video monitor device provided in the multimedia terminal device can also be used as the video display means of the intercom device, the space required for the installation place of the device when both the multimedia terminal device and the intercom device are installed. Can be reduced.

Further, when the call switch of the intercom device is operated during absence, the video and audio information taken by the intercom device is sent to a preset transfer destination, and the appearance of a visitor who is absent at the transfer destination. You can find out that it is very effective in crime prevention.

Further, by using a multimedia terminal device,
When the intercom device call switch is operated while multimedia communication is being performed with any of the terminals, a sub-screen is formed on the video monitor device, and the video taken by the intercom device is displayed on the sub-screen. Since it is displayed, it is possible to confirm that there were visitors and the like during the multimedia communication and the state of the guests, so that it is possible to smoothly respond to the visitors and the like during the multimedia communication.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows a multimedia terminal device according to an embodiment of the present invention. Note that this multimedia terminal device uses a basic ISDN interface as a transmission path.

In FIG. 1, the system control unit 1 controls the respective parts of the multimedia terminal device, processes the upper layers of multimedia communication, executes various application programs included in the multimedia terminal device, In addition, various control processes such as intercom control process are executed, and the ROM (read only memory) 2 is for executing a part of the control process program executed by the system control unit 1 and the control process program. It stores various data necessary for
An AM (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 system software, a plurality of application programs, a large number of user data, and transfer destination information when the answering mode is set. For storing various information unique to this multimedia terminal device such as
Is for operating this multimedia terminal device.

The intercom interface circuit 7 is for connecting an intercom device (which will be described later) 8 including a call switch, a microphone, a speaker, and a video camera, and intercom sound input / output with the intercom device 8. The input / output signal is applied to one switching connection end of the switching device 9, and the intercom moving image signal input from the intercom device 8 is applied to one switching connection end of the switching device 10 and the display control unit 11.

The voice input / output device 12 is for inputting / outputting call voice information during multimedia communication, and the call voice input / output signal is applied to one switching connection end of the switch 9.

The voice CODEC 13 is for performing signal conversion processing of analog signal / digital data for transmitting an analog voice signal using the B channel of ISDN, and its analog signal input / output terminal has a switching unit 9. Is added to one of the switching connections.

The switching device 9 includes any two of the three switching connections.
The two are interconnected. That is, the switch 9 connects the voice input / output device 12 and the voice CODEC 13 to each other, or the voice input / output device 12 and the intercom device 8 to each other, or the voice CODEC 1
3 and the intercom device 8 are interconnected. Further, the voice control unit 14 includes the switch 9 and the voice input / output device 12.
Is for controlling the operation of. The switch 9 is normally controlled to switch the audio input / output device 12 and the audio CODEC 13 to each other.

The video camera device 15 is for forming transmission moving image information at the time of multimedia communication, and the output transmission moving image signal is applied to the other switching connection end of the switching device 10.

The switching device 10 switches and connects either the intercom video signal applied to one switching connection terminal or the transmission video signal applied to the other switching connection terminal to its common connection terminal. Is. Also, this switching device 10
The video signal output from the common connection end of the
It is added to the video signal input end of the EC 16 and to the moving image signal input end of the display control unit 17. The video camera control unit 18 is for controlling the operation of the switching device 10 and the operations of the video camera device 15 such as shooting on / off, zooming in / zooming out, and panning.

The video CODEC 16 converts the NTSC format moving image signal input from the image signal input terminal into corresponding moving image data of digital data, converts the moving image data into predetermined CIF format moving image data, and further, the TTC standard. JT-H. 261 is encoded and compressed to form moving image information, and the encoded and compressed moving image information is converted into original CIF format moving image data, and the moving image data is a corresponding analog signal moving image signal. , And the moving picture signal is converted into a moving picture signal in the NTSC format.

The display control unit 11 controls the display contents of the screen displayed on the video monitor device 19 for displaying and outputting the moving image information, and the display screen information of the moving image signal input from the switch 10 and the video CODEC 16 are provided. From the intercom interface circuit 7 and the display screen signal of the intercom video signal added from the intercom interface circuit 7, and the display screen information
The display screen of the video monitor device 19 is configured in an appropriate combination in accordance with a command from the system control unit 1.

The ISDN interface circuit 20 is an IS
In addition to being connected to the DN, 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 a D channel transmission control unit. 21 and the signals of the two B channels are also exchanged with the multiplexer / demultiplexer 22.

The D channel transmission control unit 21 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 22 multiplexes data of a plurality of media such as voice, moving images, and other general-purpose data exchanged using the B channel, and TT
C standard JT-H. The frame data defined in 221 is formed and transmitted to the line side, and the data of a plurality of media multiplexed in the received frame data is separated. This multiplexer / separator 22 is
Exchange voice data with voice CODEC13,
Video data is exchanged with the video CODEC 16. Also, general-purpose data is exchanged with the system control unit 1.

The ringing tone generating section 23 also generates a ringing tone for notifying the user that the calling switch of the intercom device 8 has been turned on.

These system control unit 1, ROM 2 and R
AM3, clock circuit 4, magnetic disk device 5, operation display unit 6, intercom interface circuit 7, display control unit 1
1, audio CODEC 13, audio control unit 14, video CO
The DEC 16, the video camera control unit 18, the D channel transmission control unit 21, the multiplexing / demultiplexing device 22, and the ringing tone generation unit 23 are connected to the internal bus 24, and data exchange between these respective elements is performed. , Mainly internal bus 2
4 through.

FIG. 2 shows an example of the configuration of the intercom device 8.

In the figure, the video camera device 31 is
The image of an outdoor scene is captured, and the output moving image signal is applied to the main body interface circuit 32. The microphone 33 is for inputting voice information such as outdoors.
The output audio signal is applied to the main body interface circuit 32. The speaker 34 outputs audio information to the outdoors and the like, and the response audio signal output from the main body interface circuit 32 is added to the speaker 34. The call switch 35 is turned on by a visitor or the like, and its operation signal is applied to the main body interface circuit 32.

The main body interface circuit 32 outputs the moving image signal input from the video camera device 31, the voice signal input from the microphone 33, and the operation signal input from the call switch 35 to the intercom interface circuit 7 of the main device, respectively. The audio signal input from the intercom interface circuit 7 is output to the speaker 34 as a response audio signal.

FIG. 3 shows an example of the configuration of the operation display unit 6.

In the figure, the operation display section 6 comprises a liquid crystal display 41 and a touch panel device 42 having a sensor unit (not shown) attached to the display screen of the liquid crystal display 41. The touch pen 43 is for operating the touch panel device 42 to indicate arbitrary coordinates on the display screen of the liquid crystal display 41, and for performing a predetermined touch operation.

The display content of the liquid crystal display 41 of the operation display unit 6 changes appropriately depending on the operation state of the multimedia terminal device at that time, and a large number of operation keys and an appropriate guidance message are displayed.

The user refers to the displayed contents and uses the touch pen 43 to touch the displayed contents of the liquid crystal display 41. As a result, the coordinates of the transparent sensor unit attached to the display screen of the liquid crystal display 41 are output from the touch panel device 42, whereby the system control unit 1 determines the coordinates touch-operated by the user and determines the coordinates. The content of the operation performed by the user is determined based on the display content of, and the operation based on the operation content is performed.

For example, when the user operates and inputs the transfer destination in the absence mode, the "function" button (operation symbol) is touch-operated from the initial screen to display the function operation list. Then, the contents of the function to be operated (transfer destination registration in this case) are specified from the contents of this list display, and the desired operation function is selected. Then, in this case, the ISDN number (telephone number) of the transfer destination is input by operating the numeral buttons (operation symbols) of the displayed ten-key pad,
Finish registering the transfer destination. In this way, the ISDN number of the transfer destination that has been input by operation is stored in the magnetic disk device 5 as predetermined terminal parameter information.

In this case, the initial screen displayed on the liquid crystal display 41 includes a display of operation symbols such as "intercom response" for performing a response operation when there is a call from the intercom device 8.

FIG. 4 shows an example of a call control procedure performed by the telephone terminal connected to the ISDN with the ISDN. The terminal device connected to the basic interface of ISDN basically executes this call control procedure to control connection and release of the call.

That is, the calling terminal first sets the circuit switching mode as the transfer mode and sends a call setting message SETUP with the destination terminal designated as the destination to the ISDN to request call setting with the called terminal. Sends a call setup message SETUP to the designated destination terminal to make a call. The ISDN also sends a call setting acceptance message CALL_PROC for notifying the call setting status to the calling terminal.

Upon detection of an incoming call, the called terminal sends a calling message ALERT to ISDN when the called terminal is ready to receive a call, and ISDN sends a calling message ALERT to the calling terminal to call the called terminal. Notify that it has started.

When the user picks up the handset and responds to the incoming call, the destination terminal sends a response message CONN to ISDN.
The ISDN sends a response message CONN to the calling terminal to notify that the called terminal has accepted the call.

The ISDN also sends a response confirmation message CONN_ACK to the destination terminal to confirm the response of the destination terminal, and at that point, a B channel for data transmission (call) is established between the source terminal and the destination terminal. After the establishment, the call operation using the B channel is appropriately executed between the user of the calling terminal and the user of the called terminal.

When the call ends and the user of the calling terminal returns the handset and goes on hook, the calling terminal sends a disconnection message DISC to ISDN to request the release of the B channel, and ISDN releases the release message REL.
To the calling terminal to notify the restoration of the B channel. On the other hand, the ISDN sends a disconnection message DISC to request the release of the B channel to the destination terminal, and the destination terminal sends a release message REL to the ISDN to notify the B channel recovery.

As a result, the calling terminal IS sends the release completion message REL_COMP notifying the completion of the channel disconnection.
In response to the DN, the B channel between the calling terminal and the ISDN is released. At the same time, the ISDN sends a release completion message REL_COMP to the destination terminal, and the ISDN
The B channel between the terminal and the destination terminal is released. As a result, the B channel set between the calling terminal and the called terminal is completely released.

In this way, the B channel is set between the calling terminal and the called terminal, data transmission is performed, and when the data transmission ends, the B channel is released.

As shown in FIG. 5A, each message for ISDN call setup has a protocol specification (format, format, etc.) that defines a layer 3 call control message.
Protocol identifier to identify the sequence, etc.),
Call number to identify which call the message pertains to, message type to identify the content of each message, mandatory information elements that must be added to each message, and each message It is composed of additional information elements added as necessary. In addition, 0, 1 or a plurality of essential information elements are set according to the message type, and 0, 1 or a plurality of additional information elements are arranged according to the situation.

The call setup message SETUP, as shown in FIG. 9B, has a "transmitting capability" as an essential information element.
And the additional information element is, for example, “calling number”,
It has information elements such as "Called Number", "Lower Layer Consistency", "Higher Layer Consistency", and "User-User".

The outline of these information elements will be described.

The "transfer capability" information element is an information transfer indicating whether the content of the information to be transmitted is voice, unrestricted digital information, restricted digital information, 3.1 KHz audio, 7 KHz audio, or video. Capability, transfer mode indicating whether the switching function used is circuit switching or packet switching, information transfer speed indicating information transfer speed, information indicating information transfer mode, and information indicating user information protocol, etc. Consists of.

The "calling number" information element is the ISDN of the calling terminal.
Represents the number and the "Called number" information element is the IS of the called terminal.
Indicates the DN number.

The "Lower layer compatibility" information element is for use in the communication possibility check with the partner terminal,
The basic contents are the same as the “Transmission capability” information element. Further, this "lower layer compatibility" information element includes, for example, TTC standard JT-H. More detailed contents such as 221 functions are included.

The "higher layer compatibility" information element is for use in the consistency check with the partner terminal, and is, for example, a telephone, a group 2 / group 3 facsimile, a group 4 facsimile, mixed mode, teletex,
Displays which of the terminal functions such as videotex, telex, audio-visual, message handling system, telewriting, video conferencing, or still image conferencing are provided.

The "user-user" information element is intended to be used for the communication of information between users, the content of this "user-user" information element being transferred transparently without being interpreted by ISDN. It is transmitted to the other user.

Further, in the multimedia terminal device, in the B channel, the TTC standard JT-H. Data is exchanged in the multi-frame format defined by 221.

As shown in FIG. 6, one multi-frame MFL includes eight sub-multi-frames SMF1 to SMF.
8 sub-multiframes SMF1 to 8
Each SMF 8 is composed of two frames. That is, one multi-frame MFL is composed of 16 frames FLM0 to FLM15.

Each frame FLM0 to FLM15
As shown in FIG. 7, it is composed of data of 80 octets, and the respective bit positions in which these octets are arranged in the bit order form subchannels SCH1 to SCH8.

The eighth bit of the first octet to the eighth octet is the frame synchronization signal (Frame Ali).
The 8th bit of the 9th octet to the 16th octet constitutes a bit rate allocation signal (Bit rate Allocation).
Signal) BAS. That is, the sub-channel SCH8 is assigned to the eighth bit of the 17th octet to the 80th octet, and this portion is applied to the application channel AC (Application Channel).
el) is sometimes called. Also, sub-channel SC
In the 17th to 24th octets of H8, data of an encrypted channel for exchanging key information for encrypting data may be set (optional).

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

That is, even frames FLM0, FLM
2, ..., The second to eighth octets of the FLM 14, and the odd frames FLM1, FLM3 ,.
A horizontal synchronization signal composed of an 8-bit data pattern "001101111" is arranged in the FLM 15, and a vertical synchronization composed of a 6-bit data pattern "001011" is arranged in the first octet of the odd-numbered frames FLM1, FLM3, ..., FLM11. A sync signal is placed.

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, N5 of the first octet of the frame, the sixth frame and the eighth frame are used to indicate the multi-frame number. Of these, the bit N5 is used to indicate whether or not the 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 of 0 to 15, and the same multi-frame number appears every 16 multi-frames.

The tenth frame, the twelfth frame,
And bit L of the 1st octet of the 13th frame
1, L2, L3 are used to display the connection number indicating the order in which the B channels carrying the frame among the currently used B channels are connected. Also, the bit R of the first octet of the fifteenth frame is reserved (reserved) for future recommendation,
The value is set to 0.

The bit TEA of the first octet of the 14th frame is used to indicate that data transmission is impossible due to an internal failure of the data terminal device.

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

Also, odd-numbered frames FLM1, FLM3
..., bit C1 of the fifth octet, sixth octet, seventh octet, and eighth octet of FLM15
C2, C3 and C4 are for displaying a CRC (Cyclic Redundancy Check) code that is referred to for data error detection (that is, channel quality detection) of two consecutive frames (that is, sub-multiframe). , And 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. 9, even-numbered frames FLM0, FLM2.
.., FLM14, 8-bit data representing the capability BAS or BAS command is arranged, and in the subsequent odd numbered frames FLM1, FLM3 ,.
A double error correction code for error correcting the value of the capability BAS or BAS command transmitted in the immediately preceding frame is arranged.

Further, the transmission of the data of the multi-frame MFL is performed in the order of the frame numbers, and the respective frames FLM0 to FLM15 are 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. 11 is a T applied as a transmission control procedure executed when an audiovisual terminal such as a multimedia terminal device 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 for 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 setup 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 setup request for securing the second B channel is started (phase B1-2). ).

Then, in principle, the modes having the highest function in common with 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. Send a BAS command that specifies the terminal function to operate the function to the calling terminal,
Parameters common to the device functions of the calling terminal and the called terminal are set (phase B2). Thereby, in the first channel, for example, data transmission of audio data (16 Kbps) and data transmission of moving image data (46.4 Kbps) corresponding to the transmission mode selected at that time are 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). ), Common parameters are set (phase CB3).

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 with each other. Using the B channel, for example, voice data, general data, and
Video data is 58 Kbps and 6.4 Kbps, respectively
And a data rate of 62.4 Kbps is assigned for data transmission (see FIG. 12). Here, the general-purpose data channel exchanges C & I mode (conference control function) data other than voice data, for example, C & I function, telewriting communication function, and bulk transfer function (group 4 facsimile data, etc.) data. Used for.

To end such data transmission, first, the second channel is disconnected. At this time, the first
For voice data transmission on the channel only, the procedure for setting the common mode is performed (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 in which 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 call for the second channel can be released by the release procedure.

In the first channel, phase CD1
During the phase CD2, the audio data and the moving image data are transmitted at the total transmission rate of 62.4 Kbps in the frame mode. Further, when the operator of one terminal ends the call, the transmission of the moving image data is finished. In order to use all the transmission capacities of the first channel including the transmission capacity of the moving image data for voice transmission, the mode is switched to the mode 0F (phase D2), and then the call disconnection release procedure of the D channel is performed. Is ready to be released.

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 and the newly secured second channel are channel-synchronized, and when the channel synchronization is established, the allocation of the transmission rate of the audio data and the moving image data is reset. However, in order to utilize the increased transmission capacity of the B channel, the coding rule (coding method) of audio data and moving image data is changed so that higher quality audio data and moving image data can be exchanged. There is.

Further, when the data transmission is finished, it is necessary to once change from the mode in which the transmission path 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. is there. Therefore, first, each encoding rule of audio data and moving image data is set to a method that optimizes the transmission capacity of the first channel of 62.4 Kbps, and the transmission mode of only the first channel is changed, while the second channel is , The state of synchronization with the first channel is stopped, the mode shifts to mode 0F in which user data is in an idle transmission state, and the call is disconnected / released by the call disconnection release procedure of the D channel. The first channel is
From two types of media transmission of audio data and video data,
After changing to mode 0F, which is a transmission mode for only voice data, the call is disconnected / released by the D channel call disconnection release procedure.
release. In addition, the first channel, without switching the mode to two types of media transmission of audio data and video data,
It is also possible to disconnect / release the call after directly changing the mode to the mode 0F. In addition, the billing information obtained in the call disconnection / release procedure is managed for each channel.

With the above configuration, the system control unit 1 executes the processing shown in FIGS. 13 and 14 as the processing relating to the call from the intercom apparatus 8.

First, it is monitored that the call switch 35 is operated and an operation signal is output (determination 1
01 NO loop), the call switch 35 of the intercom apparatus 8 is turned on by a visitor, the call switch 35 is turned on, and an operation signal is output.
When the result of 01 is YES, the ringing tone generator 23 generates a ringing tone (process 102).

Then, it is checked whether or not the answering mode is set at that time (decision 103). Judgment 103
When the result is YES, the registered transfer destination is called (process 104), a predetermined call setup procedure is executed (process 106), and the first B channel (first channel) is executed.
Is established (process 107), signal synchronization is performed on the first channel (process 108), and when the signal synchronization is established, an additional call setting procedure is executed (process 109) and the second B channel (second Channel) (process 109) and signal synchronization on the first and second channels (process 110),
When the signal synchronization is established, a voice CO
The DEC 13 and the intercom device 8 are interconnected, the intercom video signal is selected by the switch 10 (process 111), and the video information and audio information obtained by the intercom device 8 are transmitted to the partner terminal and received from the partner terminal. The produced audio signal is output to the intercom device 8.

Thus, the user of the partner terminal can talk with the visitor who operated the intercom apparatus 8 while watching the video. The system control unit 1 waits until the call ends (NO loop of decision 112). The call is ended by a user operation on the other terminal.

When the user of the partner terminal operates to end the call, and the result of determination 112 is YES, the system control unit 1 executes the termination procedure for terminating the B channels of two channels (process 113). The call disconnection release procedure for two channels is executed (process 114), and the process of transferring the information of the intercom device 8 when the answering mode is set is completed.

When the answering mode is not set and the answer mode is not set, it is checked whether the user operates the intercom response (decision 115). When the result of determination 115 is NO, the process returns to determination 101 and it is monitored that the call switch 35 of the intercom apparatus 8 is turned on.

When the user makes an intercom response operation and the result of determination 115 is YES, it is checked whether multimedia communication is being performed at that time (determination 116).

When the result of determination 116 is YES, the display control unit 11 is instructed to set a display mode for creating a small screen in a predetermined area (for example, a 1/4 area at the lower right position) of the display screen of the video monitor device 19. With setting (Processing 11
7) Then, the display control unit 11 is instructed to display the intercom video signal display screen on the child screen thus set (process 118).

As a result, the screen imaged by the intercom device 8 is displayed on the child screen formed on the video monitor device 19.

Next, the system control unit 1 sets the audio off mode for designating not to transmit the voice information to the partner terminal, temporarily suspends the transmission of the voice information to the partner terminal (process 119), and switches the switch. The voice input / output device 12 and the intercom device 8 are mutually connected by 9 (Processing 1
20), using the voice input / output device 12, sets a state in which the user can talk with the microphone 33 and the speaker 34 of the intercom device 8.

As a result, the user can have a conversation with the visitor through the intercom unit 8. Also,
In this state, the operation display section 6 displays an operation symbol for instructing the end of the intercom call.

In this state, the system control unit 1 waits until the user commands the end of the intercom call (NO loop of decision 121). When the user finishes the conversation with the visitor and gives an instruction operation to end the intercom call, when the result of determination 121 is YES, the system control unit 1 displays the child displayed on the display screen of the video monitor device 19. A display mode is set in the display control unit 11 so that the screen is erased and only the main screen is displayed (process 12).
2), the voice input / output device 12 and the voice COD by the switch 9
The EC 13 is interconnected (process 123), the audio-on mode that specifies transmission of voice information to the partner terminal is set, transmission of voice information to the partner terminal is restarted (process 124), and the call operation being performed To continue.

When the user performs a response operation and the multimedia communication is not being performed at that time, when the result of the determination 116 is NO, the intercom video signal is selected by the switch 10 and the display control unit is selected. The main screen of the video monitor device 19 is displayed on 11 (process 125), and the voice input / output device 12 and the intercom device 8 are interconnected by the switch 9 and the voice input / output device 12 is turned on (process 126). , Allows the user to have a conversation with a visitor via the intercom device 8.

In this state, and in this state, an operation symbol for commanding the end of the intercom call is displayed on the operation display section 6.

In this state, the system control unit 1 waits until the user commands the end of the intercom call (NO loop of decision 127). When the user finishes the conversation with the visitor and the intercom call end is commanded, and the result of determination 127 is YES, the system control unit 1 instructs the display control unit 11 to end the display. , Turn off the voice input / output device 12 (process 128),
The video and audio of the intercom device 8 are turned off.

In this way, in this embodiment, when the call switch 35 of the intercom apparatus 8 is turned on, and when the absence mode is set in the main body apparatus,
Since it is possible to appropriately speak between the user of the transfer destination terminal and the person who has turned on the call switch 35 of the intercom device 8, it is possible to appropriately speak with the user of the transfer destination set in advance, so that the user who is not at home can visit the customer. If there is a problem, it can be dealt with appropriately.

When the call switch 35 of the intercom device 8 is turned on, if the user is in multimedia communication, a child screen is formed on the display screen and the image of the intercom device 8 is displayed on the child screen. In addition, since voice can be input / output to / from the intercom apparatus 8, it is possible to have a conversation between the user and the customer, and to respond to the customer even during multimedia communication, which is very convenient.

When the call switch 35 of the intercom device 8 is turned on, and the absence mode is not set and the multimedia communication is not in progress, the intercom device 8 is used by using the video monitor device 19 of the main body device. Is displayed and the audio input / output device 12 of the main unit is used to input / output audio with the intercom device 8. Therefore, a video monitor device or an audio input / output device for the intercom device 8 can be installed in the house. You do n’t have to prepare
The device cost can be reduced and the required space can be reduced.

[0098]

As described above, according to the present invention,
Since the video monitor device provided in the multimedia terminal device can also be used as the video display means of the intercom device, it is possible to reduce the space required for the installation location of the device when the multimedia terminal device and the intercom device are both installed. Get the effect that you can.

When the call switch of the intercom device is operated when the user is absent, the video and audio information taken by the intercom device are sent to the preset transfer destination, and the appearance of a visitor who is absent at the transfer destination. You can get the effect that the crime prevention effect is great.

In addition, by using the multimedia terminal device,
When the intercom device call switch is operated while multimedia communication is being performed with any of the terminals, a sub-screen is formed on the video monitor device, and the video taken by the intercom device is displayed on the sub-screen. Since it is displayed, it is possible to confirm that there are visitors even during the multimedia communication and the state of the guests, and thus it is possible to smoothly respond to the visitors and the like during the multimedia communication.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing an example of a configuration of an intercom device.

FIG. 3 is a schematic perspective view showing an example of an operation display unit.

FIG. 4 is a time chart showing an example of call control of a telephone terminal using ISDN as a transmission path.

FIG. 5 is a schematic diagram showing an example of a signal format of a signal for call control.

FIG. 6 is a schematic diagram showing an example of a multi-frame frame configuration.

FIG. 7 is a schematic diagram showing an example of a signal configuration of one frame.

FIG. 8 is a schematic diagram showing an example of a frame adjustment signal.

FIG. 9 is a schematic diagram showing an example of a bit allocation signal.

FIG. 10 is a schematic diagram for explaining a signal transmission order.

FIG. 11: TTC Recommendation JT-H. The time chart which showed the example of the general procedure of 242.

FIG. 12 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. 13 is a flowchart showing a part of the outline of the processing of the system control unit when the call switch of the intercom apparatus is turned on.

FIG. 14 is a flowchart showing the rest of the outline of the processing of the system control unit when the call switch of the intercom device is turned on.

[Explanation of symbols]

 1 System Control Unit 2 ROM (Read Only Memory) 3 RAM (Random Access Memory) 6 Operation Display Unit 7 Intercom Interface Circuit 8 Intercom Device 9, 10 Switcher 11 Display Control Unit 12 Voice Input / Output Device 13 Voice CODEC 19 video monitor device 31 video camera device 32 main body interface circuit 33 microphone 34 speaker 36 call switch

Claims (3)

[Claims] 1. A multimedia communication function means for exchanging at least moving picture information and audio information, and a video display means for displaying and outputting the received moving picture information.
In a multimedia terminal device having a first voice input / output unit for inputting / outputting voice information, at least a call switch, a video camera, and
When an intercom apparatus having a second audio input / output unit and a call switch of the intercom apparatus are turned on, moving image information output from the video camera is displayed on the video display unit and the first audio is output. A multimedia terminal device comprising control means for connecting input / output means to the second voice input / output means. 2. A multimedia communication function means for exchanging at least moving picture information and audio information, and a video display means for displaying and outputting the received moving picture information.
In a multimedia terminal device having a first voice input / output unit for inputting / outputting voice information, at least a call switch, a video camera, and
When the intercom device having the second voice input / output means and the call switch of the intercom device are turned on, a transfer destination stored in advance is called,
A multimedia terminal characterized by comprising control means for transmitting moving image information output from the video camera to the transfer destination and for exchanging audio information using the second audio input / output means. apparatus. 3. A multimedia communication function means for exchanging at least moving picture information and audio information, and a video display means for displaying and outputting the received moving picture information,
In a multimedia terminal device having a first voice input / output unit for inputting / outputting voice information, at least a call switch, a video camera, and
When the call switch of the intercom device is turned on while multimedia communication is being performed between the intercom device having the second audio input / output means and any of the other terminals, the video is displayed at that time. A predetermined sub-screen is formed at a predetermined position on the display screen of the display means, the moving picture information output from the video camera is displayed on the sub-screen, and the first audio input / output means is connected to the second audio input / output means.
A multimedia terminal device comprising control means connected to the voice input / output means.