JPH0723359A - Picture communication equipment - Google Patents

Abstract

PURPOSE:To simply secure secrecy according to the one-sided intention on a transmitting terminal side preventing one-sided storage on a receiving terminal side by applying control to interrupt a transmission output to the receiving terminal part when the receiving side detects a secrecy control signal. CONSTITUTION:A receiving side telephone number is depressed through a PB dial key in an operation part 39. When a transmitter does not want to show his (or her) own face on a receiving terminal side VTR or the like, a storage inhibition key 40 is manually depressed. Thereby a storage inhibition code is transmitted from a transmitting side control circuit 41 to a destination side receiving terminal through a multiplexer 54 or the like and a line L1 as a superposed sound if a PB dial '1'. The storage inhibition code transmitted to the destination side receiving terminal through a line L2 is supplied to a circuit 41. The circuit 41 detects the inhibition code and turns off a switching means 48 and picture data supplied from a DAC 44 are only monitored by a display device 43 without being supplied to an internal memory 42 and a video output terminal 46 to set up a talking state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication device for enhancing confidentiality or confidentiality of a TV telephone system or the like.

[0002]

2. Description of the Related Art Conventionally, in a video conference, audio and video are transmitted and received in real time between two conference rooms to conduct a conference. For example, there is a time difference of 7 hours between Japan and the United States. , Real-time meetings are impossible. Therefore, there is a video conference in which one conference room is operated to operate the device of the other conference room and record the conference content in a VTR or the like so that the conference content is reproduced mutually and the conference is advanced. .

In such a case, the conference contents recorded in the VTR can cause the secret leakage of the conference contents because even a person not involved in the conference can freely reproduce the device operation.

In order to prevent such secret leakage, the applicant of the present invention has proposed a video conferencing system configured to keep secrets of conference contents in Japanese Unexamined Patent Publication No. 4-223648.

An outline of such a TV conference system will be described with reference to FIG. As shown in FIG. 7, this TV conference system is a conference system 2 provided in one conference hall 1
And the other conference hall system 4 provided in the other conference hall 3. Both conference hall systems 2 and 4 are, for example, ISD which is a public digital line.
N (Integrate Service Digit
al Network) line 5 is connected.

The above-mentioned conference hall system 2 includes a first camera 6 which is a camera for photographing a person or the like, a second camera 7 which is a camera for photographing a document or the like, and contents of a conference or the like. VTR for recording or reproducing recorded data, a receiver 9 for inputting voice, an operating device 10, a receiver 11 for producing a voice supplied from the other party, and an image supplied by the other party. Is displayed, a terminal control device 13 that controls the overall operation of the conference system 2, an identification data input / output device 14 that is identification data input / output means, and an identification data storage device 15 that is identification data storage means. And a codec 16.

The other conference hall system 4 includes a first camera 17, a second camera 18, a VTR 19, a transmitter 20, an operating device 21, a receiver 22, and a monitor 2.
3, a terminal control device 24, an identification data input device 25, an identification data storage device 26, and a codec 27, which have the same configuration and operation as the conference hall system 2 on one side. The system 2 will be mainly described.

The operation device 10 of the conference hall system 2 is a device for designating the operation of various devices of the conference hall systems 2 and 4. The identification data input / output device 14 is composed of, for example, a magnetic card reader or an IC card reader, a keypad, and the like, and stores data of data that specifies registration of identification data and inquiry of identification data that are predetermined by persons who hold a conference. Input and output. The identification data storage device 15 stores the identification data input by the identification data input / output device 14.

The terminal control device 13 stores the identification data input by the identification data input / output device 14 in the identification data storage device 15 and also in the magnetic card or the IC card. Control of registration processing of identification data, identification data input by the identification data input / output device 14,
The identification data stored in the identification data storage device 15 is referred to (matching processing) and only the operation of various devices of the conference hall system 2 is permitted, or the conference hall system 2 is operated.
Also, control is performed to permit operation of various devices in both the conference hall system 4.

[0010]

That is, in the above-described conventional TV conference system, there is provided a terminal control device having identification data input / output means for inputting / outputting identification data and identification data storage means for storing identification data. The identification data stored in the identification data storage means and the identification data transmitted from the other party's terminal are provided by the terminal controller when the identification data is transmitted from the other party's terminal. By referring to the other party's terminal and making it possible for the other party's terminal to control the device, the content of the meeting and the like are kept confidential.

In the above-mentioned TV conference system configuration, confidentiality cannot be maintained unless the identification numbers are set in advance by the parties involved in the conference. Although it is possible to construct a system by sending the identification numbers to each other, it is often the case that the sender side unilaterally holds confidentiality in a TV telephone or the like for an unspecified person.

For example, the case where the speaker on the transmitting side is naked, when the environment is unfavorable, or when a gossip is made. Of course, in these cases, the power of the camera on the transmitting side may be turned off, but this makes the video telephone meaningless.

In addition, many of the current types of private TV phones and the like do not have a video / audio output terminal for adding a function of recording or recording a transmission image or sound to the VTR, but like the recorded message. Considering functions and the like, it is considered that a model in which a receiving side automatically adds a function of automatically storing transmission video / audio in a VTR or the like is considered to be common.

In such a case, as described above, an image which the transmitting terminal side does not want to send is not easily stored in the VTR or the like of the receiving terminal side, the privacy and the like of the sending side are protected, and the confidentiality is kept. Is required.

The present invention has been made in response to the above request, and its purpose is to unilaterally receive image and / or audio information requiring confidentiality on the transmitting terminal side on the receiving terminal side. It is an object of the present invention to provide an image communication device that can be easily concealed by one-sided intention of the transmitting terminal side so as not to store it.

[0016]

The first image communication apparatus of the present invention, as an example thereof is shown in FIG. 1, transmits and receives voice and / or video signals between transmission and reception terminals via a line. In the image communication device configured to perform, a transmission side control unit 41 provided on the transmission terminal side for controlling transmission of an audio and / or video signal, and concealment to the reception terminal side via this transmission side control unit 41 Concealment control signal giving means 40 for transmitting a control signal, and a concealment control signal provided by the receiving terminal side for controlling reception of audio and / or video signals and detecting the concealment control signal transmitted by the concealment control giving means 40 on the transmitting terminal side. Receiving side control means 41, and internal storage means 4 for storing transmission audio and / or video signals provided at an audio and / or video output end.
2 and / or a reception terminal unit 60 composed of output terminals 43, 46 and 49, and the reception side control means 41 cuts off the transmission output to the reception terminal unit 60 when the confidential control signal is detected. Is.

As shown in FIGS. 1 and 3, the second image communication apparatus of the present invention is configured to exchange voice and / or video signals between transmission / reception terminals via a line. In the image communication apparatus described above, the transmission side control means 4 is provided on the transmission terminal side and controls transmission of audio and / or video signals.
1, a confidentiality control signal giving means 40 for transmitting a confidentiality control signal to the receiving terminal side via the transmitting side control means 41, and a storage means 62 for storing a predetermined image separately from the audio and / or video signals to be transmitted. And a switching output 61 for switching between the audio and / or video signal and the output of the storage means, and the transmission side control means 41 switches the switching means 61 when the security control signal is supplied from the security control signal giving means 40. The storage means 62 is switched to output.

[0018]

According to the first aspect of the present invention, in the image communication apparatus for transmitting and receiving the image and the like between the transmitting and receiving terminals, the transmitting terminal side voluntarily stores the transmitting signal in the storing means or the VTR.
When the store terminal of the receiving terminal side does not store the transmission signal by simply manually pressing the store prohibition key that prohibits the recording and hard copy printing, the storage means is not stored. It can be obtained from the image communication device capable of preventing the leakage of confidential information due to the reading of the.

According to the second aspect of the present invention, when an image communication device for transmitting and receiving images and the like between the transmitting and receiving terminals is pressed by the store prohibition key on the transmitting terminal side, the image signal specially stored in the storage means is talked for example. Since it is configured to output the image pickup signal by switching to the person's image pickup signal, it is possible to obtain an image communication apparatus which does not need to easily send the confidential information to the receiving terminal by the intention of the transmitting terminal side.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A configuration in which the image communication apparatus of the present invention is applied to a TV telephone system will be described below with reference to FIGS.

FIG. 1 shows a transmission / reception terminal of one of the transmission / reception terminals of this example. First, the transmission terminal side will be described.
Reference numeral 30 is a transmitter including a voice handset,
The voice from the transmitter 30 is output to the line L ₁ from the I / F (interface) network 57 via the amplifier 31 via the switching means 56 in a normal telephone line.

On the other hand, the voice in the TV telephone system amplified by the amplifier 31 is an analog-digital converter (AD).
C) is converted into digital data via 32, compressed by the audio encoder 33 in the next stage into data matched with the line, and supplied to the multiplexer 54. The switching means 56 and the audio encoder 33 described above are controlled by the transmission control circuit 41.

On the other hand, an image pickup signal is output from a CCD camera 34, which is provided in the TV telephone terminal and is configured to pick up an image of a speaker, and is supplied to a switching means 36 and a video input terminal 35 from a VTR or the like. The image taken in from is also supplied to the switching means 36, and the image to be transmitted is switched and selected. The switching control of the switching means 36 is performed by the transmission control circuit 41.

The predetermined image signal selected by the switching means 36 is converted into digital data by the ADC 37, and compressed by the video encoder 38 in accordance with the line L ₁ .
It is supplied to the multiplexer 54.

In the multiplexer 54, the voice encoder 2
The audio converted into digital data by 3 and the compressed image data converted into digital data by the video encoder 38 are mixed like a bucket and supplied to the modem 55.

The output of the modem 55 is the switching means 56.
Is supplied to the I / F network 57 via the audio / video data sent by modulating as through the analog line L _2, the signal of the audio / video to another terminal that is connected to the front end of the line L ₂ Will be transmitted.

The transmission control circuit 41 is supplied with an instruction signal from the operation unit 39 having a push-pull dialing key group and the store prohibition key 41. The store prohibition key 40 will be described later. In addition, a switching key or the like for controlling switching from a normal telephone call state to a videophone is provided in the operation unit 39.

The transmission control circuit 41 controls the video encoder 38, the multiplexer 54, the modem 55 and the like.

Next, the receiving terminal side will be described with reference to FIG.
The receiving terminal side is also divided into audio system and video system. That is, from the analog line L ₂ to the I / F network 57 and the modem 5
An analog signal input from another transmission terminal 5 is demodulated into digital data and then separated into video data and audio data by a demultiplexer 54.

The separated audio data is the audio decoder 53.
The compressed data is decoded into time-series data by, converted into an analog signal by the digital-analog converter (DAC) 52, amplified by the amplifier 50 through the switching means 51, and then the voice is emitted through the handset 49 in the handset. . The switching means 51 performs switching between the normal telephone line signal supplied from the preceding stage of the modem 55 and the voice of the TV telephone line.

On the other hand, the video data separated by the demultiplexer 54 is returned to the raster image data by the image decoder 45 and converted into an analog signal by the DAC 44, for example, the component signal is converted into a composite signal,
An NTSC composite signal is generated and supplied to the monitor display device 43.

Further, the video data digitized by the DAC 44 is passed through the switching means 48 and the amplifier 47,
It is supplied to the video output terminal 46 and recorded on a VTR or the like connected to the video output terminal 46. Of course, if the video signal is a component signal, horizontal and vertical synchronization signals are added and converted into, for example, an NTSC composite signal. In this example, the reception terminal unit 60 is configured by including an internal memory 42, a video output terminal 46, and an audio output terminal (not shown), excluding the display device 43.

In this example, the switching means 48 and the amplifier 4
An unattended recording TV that corresponds to an unanswered telephone with video data sent from another sending terminal to the internal memory 42 from 7
It is connected so that it can be stored for a telephone.

Although not shown in the figure, a switching means similar to the switching means 48 is provided in the preceding stage of the amplifier 50 for an unrecorded voice signal of a voice signal, and a voice signal (not shown) is transferred to an internal memory or the like for recording via this switching means. It is designed to be stored.

Further, the reception control circuit 41 has an internal memory 4
2, switching means 48 and 51, video and audio decoders 45 and 53, demultiplexer 54 and modem 5
5 is being controlled.

From I / F network 57 to Tonglinger 5
The Thunder 59 is operated via 8.

In this example of the transmission / reception terminal of the TV telephone device having the above-mentioned configuration, when the store prohibit key 40 is pressed from the transmission terminal after a call, the image data and the like picked up by the CCD camera of the transmission terminal on the TV telephone line are received by the reception terminal. Although it is displayed on the side display device 43, the switching means 48 is operated so that the receiving control circuit 41 shuts off so as not to supply the video output to the VTR or the like connected to the internal memory 42 or the video output terminal 46. It is made like.

Of course, the audio signal is not supplied to the audio output terminal or the internal audio memory as in the above.

In order to perform such an operation, a store prohibition key 40 is provided in this example. Generally, in an analog telephone line or the like, D is used as a selection signal for transmitting information such as the type of service and the number of the other party to be connected from the calling terminal to the exchange.
P (Dial Pulse) method and PB (Push B)
The Uton Dialing method is known. D
The P method is a signal transmission method by intermittent DC loop current, and 10 pps (10 pulses per second) and 20 depending on the transmission speed.
There is a pps (20 pulses per second) method.

The PB system has three high frequencies (1
29,1336,1477Hz) and low frequency 4 frequency (69
7, 770, 852, 941 Hz), one frequency is selected to represent the numbers 0 to 9 and the function codes of * and #. For example, the PB as shown in FIG. I have a signal receiver.

The PB signal receiver 70 will be briefly described with reference to FIG. The PB dial of the operation unit 39 shown in FIG. 1 has three high frequency bands and four low frequency bands for the numeric keys 0 to 9 and * and # keys.
A combination of two frequencies within a voice band indicated by a 3 × 4 matrix of frequencies is transmitted, a transmission tone of 400 Hz is superimposed on these signals, and the signals are transmitted to the lines L ₁ and L ₂ and supplied to the PB receiver 70 in the exchange. .

The PB signal supplied to the input terminal T ₁ of the PB receiver 70 is supplied to the third formant emphasizing filter 61. This filter 61 prevents pseudo signalization by a Japanese vowel. After the 3 formants are emphasized, PB is applied by the dial tone removal filter 62 in the next stage.
The 400 Hz dial tone superimposed in the signal is eliminated.

A band elimination filter (H-BEF) 6 that eliminates the dial tone from the PB signal eliminates high and low frequencies.
3 and (L-BEF) 64, and is divided into one frequency of the high group and the low group and converted to a square wave of constant amplitude by the limiters 65 and 66 of the next stage, and the low frequency 4 frequency of the next stage and High range 3
The BPF group 67 of high frequency is supplied. BPF group 67 is PB
Maximum output occurs when the fundamental components of the limiters 65 and 66 are synchronized to each frequency of the signal and match the frequency of the PB signal.

This maximum output is judged by the signal detection circuit 68 whether or not the signal continues for a predetermined time or longer, and it is judged whether it is a normal signal or noise, and the frequency 6 corresponding to the PB dial at the output end.
It is configured to output 97 to 1633 Hz.

By pressing the PB dial on the sending terminal side, when the connection with the predetermined number of the receiving terminal is completed, and when the exchange completes the exchange during a call, etc., even if the PB dial is pressed, these frequencies will cause the line to go through. It is only sent to the receiving terminal side via the.

Therefore, in this example, such a PB dial is substituted for the store prohibition key 40. That is, the sender on the sending terminal side does not want to store the sending image in the VTR or the like, after being connected to the other party's phone and forming the TV phone system, and the sending image is reproduced and viewed many times. When it is unpleasant, that is, when it is desired to keep the privacy of privacy, the store prohibition key 40 is pressed. The store prohibition key 40 may be, for example, the numeric key "1" of the PB dial key group in the operation unit 39 as described above.

FIG. 3A shows a flow for transmitting a PB signal determined by such a PB dial key. That is, in the first step S ₁ , the telephone number of the other party is pressed through the PB dial key of the operation unit 39 to apply a voltage.

In the next second step S ₂ , if the sender does not want to show his / her face or the like on the VTR or the like on the receiving terminal side, the store inhibit key 40 is manually pressed as in the third step S ₃ . . In the next fourth step S ₄ , the store prohibition code is the transmission control circuit 41 → multiplexer 54 → modem 55 → switching means 56 → I / F network 57.
→ The superimposed sound of the above PB dial “1” of 697 Hz and 1209 Hz is transmitted to the receiving terminal on the other side via the line L ₁ .

Assuming that the transmission / reception terminal on the other side is the one shown in FIG. 1, the store prohibition code transmitted via the line L ₂ is controlled for reception via the I / F network 57 → modem 55 → demultiplexer 54. It is supplied to the circuit 41.

The receiving control circuit 41 operates according to the flow shown in FIG. 3B. That is, the controlling circuit 41 and receive a phone call at the sixth step S ₆ the seventh step S ₇
When the store prohibition code is detected at step NO, the switching means 48 is turned “ON” in the non-detected state, and the image data digitally decoded via the video decoder 45 → DAC 44 is transferred to the internal memory 42 as in the ninth step 59.
V which is stored in or connected to the video output terminal 46.
Image signals are recorded in TR and the like. Further, it is also supplied to the display device 43 to display it, and in the tenth step S ₁₀ , the call state is set. Although not shown, the same operation is performed for voice.

In the YES state in which the store prohibition code is detected in the seventh step S ₇ , the switching means 48 is set to the “OFF” state, and the image data supplied from the DAC 44 is only monitored by the display device 43 and the internal memory 42 and The video output terminal 46 is not supplied and the tenth step S _{10 is performed.}
It is made to put in a call state with.

In the above-mentioned case, the store prohibition code is transmitted at the start of communication to determine whether or not the store is prohibited for each communication, but the store prohibition key 40 is pressed during the call. It is also possible to set the store prohibited state only for the call portion that needs to be kept secret.

FIG. 4 shows another structure of the present invention, and FIG. 5 shows a flow of the operation. FIG. 4 is a system diagram showing only the main part of the receiving terminal side of FIG. 1, and although the corresponding parts to those in FIG. It is configured to perform "on" and "off" control.

In the above configuration, when the store prohibition key 40 is pressed by the transmitting terminal side and the store prohibition code is given through the demultiplexer 54, the reception side control circuit 41 turns off the switching means 48 based on the store prohibition code. Then, the video signal is not output to the image output terminal 46, and the video signal is output to the display device 43 and the internal memory 42 to perform the display and writing operation. In addition, in the case of an answering machine, it is not possible to prohibit the display on the display device 43.
This can be easily achieved by providing a switching means (not shown) between the AC 44 and the display device 43 and controlling the switching with the store prohibition code.

The internal memory 42 is read out from the internal memory 42 to the display device 43 or the image output terminal 46 only when the receiving side user inputs the personal identification number. This personal identification number is entered in advance on the transmitting terminal side through a PB dial or the like, and the receiving control circuit 41 receiving this personal identification number supplies a read enable signal to the internal memory 42 to prohibit reading of the internal memory 42. It is made like.

5A, 5B and 5C show the flow in the case of setting the personal identification number of the recorded message as described above.

First, in the transmitting terminal, as shown in FIG.
Step ST₁Use the PB dial, etc. on the operation unit 39 to
Make a call by pressing the phone number of. Next is the second step
ST ₂As shown in, only the specified person can see the image signal of the sender.
It is not limited to a specific person by judging whether or not to allow "N
If "O", the sixth step ST₆Call state and like
However, it is possible to show it to only certain people.
If the third step ST₃Like the store prohibition key 40
When pressed, the fourth step ST_FourAs shown in the store
The prohibition code is sent to the receiving terminal side.

In the next fifth step ST ₅ , the personal identification number determined between the transmitting and receiving terminals is pressed in advance via the PB dial or the like to establish the call state shown in the sixth step ST ₆ .

At the receiving terminal, as shown in the flow of FIG.
Dynamic response step (seventh step ST ₇) For receiving
The control circuit 41 detects the presence or absence of the store prohibition code.
(Eighth step ST₈). This 8th step ST₈In
If there is no tor prohibition code, "NO", the eleventh step
ST₁₁It is confirmed that the store prohibition code has been detected.
If the answer is “YES”, the ninth step ST₉Proceed to
To be

In the ninth step ST ₉ , the personal identification number transmitted from the transmitting terminal is detected and stored in the memory or the like in the receiving control circuit 41.

In the next tenth step ST ₁₀ , the switching means 48 on the image output terminal 46 side is turned “off” and the writing of the video signal to the internal memory 42 is started, whereby the 11th step is started.
They are made and answer phone state as shown in step ST _11.

In the case of reproducing the video contents of the internal memory 42 which is in the recorded message state in which the output to the image output terminal 46 is blocked in this way, as shown in FIG. 5C, the thirteenth step ST ₁₃
As shown in the figure, the answer recording key is pressed and the internal memory 42
Is in the "on" state.

[0063] The contents of the internal memory 42 to the next 14 steps if ST ₁₄ is NO not the specific person in the reproducing state, but the display device 43 or the image output terminal 46 is outputted.
14th step ST ₁₄ is "YES" the controlling circuit 41 and presses a predetermined personal identification number with the transmission terminal at the 15 step ST ₁₅ For if NO watching match PIN at the 16 step ST ₁₆ As in the 17th step ST ₁₇ , the internal memory 42 is “off”, and if “YES”, the 18th step is executed.
Display device 43 and the image output terminal in step ST ₁₈ outputs a video signal of the internal memory 42 are made as formed by the playback state.

According to the configuration and operation as described above, by having the personal identification number, only a specific person can see the image contents stored in the internal memory 42, so that, for example, private confidentiality can be maintained.

In the above embodiment, the receiving terminal is provided with the switching means 48 for prohibiting the store, and the switching means 48 is controlled to be "on" or "off" in response to the store prohibition code from the transmitting terminal. If the receiving terminal does not have such a function, it is meaningless to send the store prohibition code. In such a case, a system diagram in the case where the transmission terminal prohibits the storage of the imaged image signal of the sender and keeps the secret will be described with reference to FIG.

FIG. 6 is a systematic diagram showing a part of the transmitting terminal side of FIG. 1. Although the same parts as in FIG. Is provided with a switching means 61, whose fixed contact b is connected to the output end of the video encoder 38, and fixed connection c
Is connected to the output end of the compressed image memory 62. Movable contact piece a
Is connected to the input end of the multiplexer 54, and the movable contact piece a is controlled by the transmission control circuit 41. Other configurations are the same as in FIG.

The compressed image memory 62 is configured to store a predetermined image or comment in advance.

Here, if the sender terminal presses the store prohibition key 40 when the surrounding environment is bad on the sending terminal side, the sending control circuit 41 switches off the input from the camera 34 or the image input terminal 35 side. The contact piece a of the means 61 is switched to the compressed image memory 62 side.

Therefore, fixed images and comments prepared in advance are transmitted to the receiving terminal side, and the surrounding environment is not shown, so that the privacy of the transmitting side is protected.

Needless to say, whether or not the receiving terminal corresponding to such store prohibition is provided may be confirmed in the negotiation process in which the ordinary telephone at the start of communication changes from the call state to the call-enabled state.

Although the present invention has been described with respect to the TV call system, it can be applied to an image communication system such as a TV conference system and a facsimile system.

According to the present invention, the transmission signal is received by the transmission terminal side by storing the transmission signal in the storage means on the reception terminal side or by manually pressing the store prohibition key for prohibiting VTR recording or hard copy printing. Since the transmission termination of the transmission signal is prohibited in the reception terminal unit on the terminal side and the transmission signal is not stored in the memory, it is possible to obtain the image communication apparatus capable of preventing the confidential information from leaking due to the reading of the storage means.

Further, by transmitting the store prohibition key and the personal identification number on the transmitting terminal side, the transmitted image information stored in the internal memory can be reproduced only by a specific person, and it is a private secret. You get something that can be protected.

Further, when the store prohibition key is pressed on the side of the transmitting terminal, the image signal stored in the storage means is specially switched to the image pickup signal of the speaker, for example, so that the confidential information can be easily provided by the transmitting terminal. It is possible to obtain an image communication device that does not need to send the message to the receiving terminal.

[0075]

According to the image communication apparatus of the present invention, the sender's privacy can be protected only by sending the store prohibition code without checking the identification data such as the ID. , You can get something that can keep secrets.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of an image communication device of the present invention.

FIG. 2 is a system diagram of a PB receiver used in the image communication apparatus of the present invention.

FIG. 3 is a flowchart when a call is made using the TV phone system which is the image communication apparatus of the present invention.

FIG. 4 is a system diagram showing another embodiment of the image communication apparatus of the present invention.

5 is a flowchart of the configuration shown in FIG.

FIG. 6 is a system diagram showing still another embodiment of the image communication apparatus of the present invention.

FIG. 7 is a system diagram of a conventional image communication device.

[Explanation of symbols]

 34 camera 38 video encoder 39 operation unit 40 store prohibition key 41 transmission / reception control circuit 43 display device 45 video decoder 46 video output terminal 48 switching means 60 reception termination unit

Claims (3)

[Claims] 1. Voice and / or voice is transmitted between the transmitting and receiving terminals via a line.
Alternatively, in the image communication device configured to exchange the video signal, the transmission side control means which is provided on the transmission terminal side and controls the transmission of the audio and / or video signal, and the transmission side control means are provided. And a confidentiality control signal providing means for transmitting a confidentiality control signal to the receiving terminal side, and a confidentiality control providing means provided on the receiving terminal side for controlling reception of the audio and / or video signal and transmitted from the confidentiality control providing means on the transmitting terminal side. A reception side control means for detecting the confidential control signal, and an internal storage means for recording the transmission audio and / or video signal provided at the audio and / or video output terminal and / or a reception terminal section comprising an output terminal. The image communication apparatus, wherein the receiving-side control means is configured to cut off a transmission output to the reception terminating unit when the confidential control signal is detected. 2. An identification signal input means is provided on the transmitting terminal side, and the control means provided on the receiving terminal side reproduces and / or reproduces the transmitted audio and / or video signal stored in the reception termination section. 2. The image communication apparatus according to claim 1, wherein the recording is permitted only when the coincidence of the identification signals is detected. 3. Voice and / or voice is transmitted between the transmitting and receiving terminals via a line.
Alternatively, in the image communication device configured to exchange the video signal, the transmission side control means which is provided on the transmission terminal side and controls the transmission of the audio and / or video signal, and the transmission side control means are provided. And a secret control signal providing means for transmitting a secret control signal to the receiving terminal side, a storage means for storing a predetermined image separately from the audio and / or video signal to be transmitted, the audio and / or video signal and the memory Switching means for switching between the output of the means and the transmitting side control means, when the confidential control signal is supplied from the confidential control signal giving means, the switching means switches to the storage means side and outputs. An image communication device characterized by being made.