JPH04265087A - Visual telephone terminal - Google Patents

Abstract

PURPOSE:To realize the man-machine interface by providing an extended service function to improve the operability and the function extensibility of a color moving picture TV telephone terminal. CONSTITUTION:A display part 11, a camera part 12, a picture codec part 13 incorporating a picture encoding/decoding circuit, a codec substrate 14, a communication equipment control substrate 15, and a key panel part 16 are provided. Keys assigned to a telephone and an extended telephone and the start key of an extended service function for direct function selection, registration and input-of set items on the operation of a TV telephone are operated on the key panel part 16. A means is provided which displays plural pictures and characters on a display device by the start of the extended service function and selects a telephone function to be newly presented and registration and set items required for operation of the TV telephone function or the TV telephone by input of corresponding keys on the arrangement of displayed pictures and characters. Thus, the number of keys which cope with the extended service function presenting or selecting method by the hierarchical constitution is reduced to a proper value.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a videophone terminal used for videophone calls and video conferences that communicate using voice and images, and more particularly to a videophone terminal that communicates color moving images.

0002

[Prior Art] In order to improve the man-machine interface of color video video telephone terminals,
No. 1 of “International Communication Research” published by KDD Engineering and Consulting. 135 (jan.19
88), page 33, section 4.1, 5.
Some devices have realized operation support functions using message display functions. Furthermore, system registration, setting, and maintenance functions were realized by changing dip switches or jumper plugs as described in Section 4.2 on page 34 of the same document.

0003

[Problems to be Solved by the Invention] First, in conventional color video video phone terminals, only communication between terminals of the same type or product has been considered. Most of the registration and setting items are already registered and set in the terminal in advance, and there is little need for the user to frequently register and change the communication mode or operation of the color video video telephone terminal. However, due to various technological advances and standardization activities,
Color video video phone terminals can be connected to analog telephones such as traditional black telephones, digital telephones using digital communication channels, and various types of video telephone terminals and video conference terminals, and many registrations and Setting items are now required.

[0004] Secondly, due to the nature of communication terminals, consideration must be given to safety and concealment in setting registration operations.

Thirdly, the videophone or videophone operation unit is often placed on a desk, depending on the form of use, so the size of the operation unit for man-machine interface is limited to some extent, and the input The number of keys and the size of the keys are also limited by considerations of operability.

Fourth, since the videophone operation unit is a telephone, it is necessary to have a man-machine interface similar to the operation method of a conventional analog telephone, and it is necessary to use a man-machine interface that is similar to the operation method of a conventional analog telephone. In order to provide functions to users without confusion, it was necessary to provide a unified man-machine interface.

Fifth, the number and area of characters and figures (images) that can be displayed on a display are limited, and when images are received and displayed on a monitor, they are displayed multiplexed on a moving image, so the display position and It was necessary to consider multiple methods.

Sixth, the timing of image transmission requires consideration of privacy and security, and a means for reflecting the user's will in each communication is required.

[0009] The purpose of the present invention is to solve the above-mentioned problems,
To provide a videophone terminal capable of improving the operability and function expandability of a color moving image videophone terminal and realizing a man-machine interface similar to that of a conventional telephone.

Another object of the present invention is to provide a video telephone terminal that can improve security by layering extended service functions, omit many keys and setting switches, and is easily expandable.

Another object of the present invention is to provide a videophone terminal that can accurately reflect the user's intention to send images and protect privacy.

0012

[Means for Solving the Problems] As a means for solving the first, second, third, and fourth problems, instead of providing actual keys for function selection, registration, and input of setting items, It is desirable to select and register functions and enter setting items directly when operating the videophone with the keys assigned to conventional telephones and extended telephones. Function selection and registration, input of setting items, and extended service functions. The activation key is realized by an actual key, and multiple images or characters are displayed on the display by activating the extended service function. The method provides a means for selecting by inputting keys that correspond to the arrangement of multiple displayed images or characters, and hierarchically configures the method of providing or selecting extended service functions and increases the number of keys that correspond to the arrangement of the displayed images or characters. This can be solved by keeping the number to an appropriate level.

[0013] As a means to solve the fifth problem, by providing respective display areas so that they do not overlap, or by providing communication operation guidance and notification display of videophone, input confirmation display and display by extended service function, etc. This can be solved by setting displays that have little chance of overlapping in the same area, setting limits on processing execution, and using them in a time-sharing manner.

As a means to solve the sixth problem, an image key is provided as an actual key, and an LED is provided to display image transmission mode information, and the image key is not input in a communication state in which image transmission is not possible during non-communication or during communication. By doing this, the image transmission mode can be changed, and in the communication state where image transmission is possible, images are automatically transmitted in automatic image transmission mode, and images are transmitted by inputting an image key in manual image transmission mode. This problem can be solved by providing a means to reset the image transmission mode registered with the extended service function at the time of termination.

[0015]

[Effect] By providing the extended service function, the number of inputs assigned to actual keys or switches can be significantly reduced, and by tiering the inputs of the extended service, it is possible to expand inputs by assigning inputs to actual keys or switches. This can be done without any increase.

[0016] Furthermore, when inputting information in the extended service function requires consideration of safety, sufficient consideration can be given by checking the input and restricting the input.

Furthermore, the size of the operating unit can be reduced by significantly reducing the number of inputs, and by limiting the number of input keys to specific keys when activating the extended service function, a sufficiently unified man-machine interface can be provided.

[0018] Furthermore, the videophone communication operation guidance, notification display, and input confirmation display are placed in the same area as the extended service function display, so that when the extended service function activation key is input, the display will be displayed regardless of whether the communication is in progress or not. Extended services can be started, but during communication start processing or when communication start processing is started, and during communication end processing or when communication end processing is started, the extension service function is prohibited from starting. Since this is forcibly terminated, communication operation guidance, notification display, input confirmation display, and display of extended service functions, which are mostly concentrated during communication start processing and communication end processing, can be used in a time-sharing manner.

[0019] Furthermore, a means for registering the image transmission mode and an image key, and displaying the current image transmission mode information is provided, so that when image transmission is disabled, the image transmission mode can be freely changed using the image key. It is possible to determine whether or not to send an image after confirming the information by voice, etc., and the user's intention can be reflected. Furthermore, depending on the purpose of use, there are many cases where images are required to be automatically transmitted in a state where images can be transmitted, and in that case, it is possible to register the automatic transmission mode in advance using the extended service function. Even in this case, it is possible to refuse image transmission for each communication by inputting an image key, and by resetting the registered image transmission mode at the end of communication, it is possible to respond to frequent image transmission requests.

[0020]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 14.

FIG. 1 shows the overall structure of a color video video telephone according to an embodiment of the present invention. In Figure 1, 1
1 is a display unit, 12 is a camera unit, 13 is an image CODEC unit containing an image encoding/decoding circuit, 14 is an image CODEC board, 15 is a communication device control board including a communication control circuit and a telephone control circuit, 16 17 is a power supply section; 18 is a main body including external input/output terminals including 15, 16, and 17; and 19 is a handset.

Referring to FIG. 2, the configuration of the color moving image video telephone according to the present invention will be explained.

In FIG. 2, 21 is composed of a camera display section including a camera section 21a and a display section 21b.

Reference numeral 22 denotes an image code decoding unit, which is composed of the following 22a to 22h. 22a is a video input SW unit that switches between a video input from a camera unit 21a and an external video input 29b using a signal line 20a, and outputs the video to an analog-to-digital conversion unit 22b. 22b analog
In the digital conversion section, after converting the video signal into a digital signal, only a valid image area is extracted and outputted to an image encoding section 22c and a monitor image multiplexing control section 22d. 2
In 2c, image information is compressed by encoding processing.
Image encoding information is output to the signal multiplexing and distribution circuit section b.

22f is an image decoding unit that decodes the image coded signal distributed from the received signal by the signal multiplexing and distribution circuit 23b to reproduce a digital image signal. The monitor image multiplexing control section 22d reads one or more screens of digital image information output from the analog/digital conversion section 22b into the memory 22e according to the control signal 20d, and processes the digital image information 22e in accordance with the timing of the decoded digital image signal outputted from the 22f. The input signal screen or reduced screen is displayed on the display by reading out the information stored in the memory of 1 pixel or every 2 pixels and superimposing or replacing it with the information of the decoded digital image signal output by 22f. Realize the monitor display to be displayed. The digital image signal output from the monitor image multiplexing control section 22d is input to the digital/analog conversion section 22g, converted into an analog video signal, and outputted to the character/graphic display superimposition section 22h. The character/graphic display superimposing unit 22h is composed of a character/graphic information superimposing LSI, extracts timing information from the input video signal, and displays the timing information at the position specified by the control signal 20e under program control of the videophone control unit 23c. Text and graphics are displayed on the display 21b by superimposing or replacing text or graphics information with the video signal.

[0026] Reference numeral 23 denotes a communication control unit composed of 23a to 23f. 23a is a network interface control unit connected to the network signal input/output 29a, and connects one or more information transmission channels managed by the network to the other party's terminal under the control of the videophone control unit 23c and according to the procedures provided by the network. Performs communication processing. 20g is a bidirectional control signal that communicates control information and processing information with 23a. Reference numeral 23b denotes a signal multiplexing and distribution circuit unit that multiplexes image encoded information, audio encoded information, and control information onto one or more of the information transmission channels managed by the network, and outputs the multiplexed image encoded information, audio encoded information, and control information to the network interface control unit 23a;
Image encoding information, audio encoding information, and control information are separated from one or more of the information transmission channels managed by the network. The image coded information separated by the signal multiplexing and distribution circuit 23b is output to the image decoding unit 22f and decoded, the audio coded information is output to the telephone control unit 23e and decoded, and the control information is output to the videophone control unit 23c. The information is output to the videophone controller 23c and becomes control determination information for the videophone controller 23c. The videophone control unit 23c includes a microprocessor, ROM, and R.
It is composed of AM, can perform multitasking processing using several control programs, and has an information processing function that interprets input information and controls each component of the videophone. The telephone control unit 23e controls the telephone interface of the videophone, transmits and receives audio signals to and from the handset 24, performs encoding and decoding processing on the audio signals, and transmits and receives encoded audio signals to and from the signal multiplexing and distribution circuit 23b, Monitors the hook switch 25 to detect on-hook/off-hook, notifies the videophone control unit 23c, controls audio output to the speaker 26, controls the key matrix 27 to detect key input, and controls the videophone. Notify the department 23c. Also, the external audio input 29d and external audio output 29c are connected to the handset 2 under control from the videophone control unit 23c.
4 audio signal and switching control. 23f is a clock circuit section, which is composed of a clock function LSI having a timer measurement function and a power backup battery, and has a function of keeping time regardless of whether the power is ON/OFF, and can read out the time at any time using a control signal 20f. The timer function is ON/OFF controlled by the videophone control unit 23c, and the videophone control unit 23c can read out and reset the timer value at any time using the control signal 20f. Code decoding section 22, communication control section 2
Provide power to 3.

The screen configuration of the color moving image video telephone according to the present invention will be explained with reference to FIG. The display screen 31 is
In this embodiment, an area that is actually displayed is provided within the area that can be displayed on the display. 32 represents a decoded video screen, on which a moving image sent by the other party is displayed. 3
3, a monitor image screen displays a full size screen or a reduced screen of the input video signal screen to be encoded. Reference numeral 34 is a videophone operation guidance, input confirmation, and notification display screen in which operational support during telephone and videophone operations is displayed. 3
Reference numeral 5 denotes an extended service function display screen, on which displays for providing extended service functions, function selections corresponding to part of the dial keys, and images representing items are displayed. 36 is the position of the viewpoint, and since screens 32 to 35 are multiplexed with higher priority as they are displayed closer to the viewer, when characters are displayed on 34, the characters appear to be overwritten on the screen 32. Therefore, if the monitor image is displayed in the entire area of the screen 33, the screen 32 becomes invisible.

FIG. 4 shows the configuration of the monitor image screen. The monitor image screen is composed of a full monitor screen 41 and a monitor sub-screen 42, which display the same-size screen and reduced-size screen of the input video signal screen that is encoded and transmitted, respectively, and expand services by inputting the monitor key. The screen registered using the function registration function is displayed.

FIG. 5 shows the videophone operation guidance, input confirmation, and notification display screen.

A time/communication time display screen 51 displays the current time in HH:MM format during non-communication, and displays the communication time in MMM minutes SS seconds format during communication. 52 displays videophone operation guidance, input confirmation, and notification. FIG. 6 shows a display example of the videophone operation guidance, input confirmation, and notification display screen. 61 is a normal screen, and only the time is displayed when there is no communication and the extended service function is not activated. 62 is the call screen 1, and when the user performs an off-hook action of lifting the handset in the normal screen state 61, a dial input prompting guidance 62a is displayed. 63 is the outgoing call screen 2, and when dial input is performed on the outgoing call screen 1 62, a dial input confirmation display 63a is displayed. When 4 seconds have elapsed after the dial input, it is determined that the dial input has ended, and a call request is made to the network. When the call request is recognized by the network and a notification is received that the other party is being called, the calling screen 64 changes and the calling notification screen 64a is displayed. When the other party answers the call, the communication screen 65 appears, and the communication time display 65a
Only.

Further, when an incoming call is detected on the normal screen 61, the incoming call screen 66 changes to display an incoming call notification 66a.

FIG. 7 shows the configuration of the extended service display screen. Reference numeral 71 displays the extended service function hierarchy in the extended service function hierarchy display area using the image or graphic selected in the previous hierarchy. 72 is an extended service display area that displays extended service function operation guidance and functions and items to be selected. Reference numeral 73 is a key-corresponding image display area in which an image representing a function or item to be selected when a corresponding dial key is input is displayed. Reference numeral 74 is an extended notification display area, which is used as a display screen when notification display is necessary, such as when an incoming call is detected while the extended service function is activated.

FIG. 8 shows an example of an extended service screen. 81
represents the extended service function startup screen, and when the extended service activation key is input in the startable state, it is detected by the telephone control unit 23e, reported to the videophone control unit 23c, interpreted, and extended service function processing is executed by the videophone control unit. A screen 81 is displayed that is activated as one of the plurality of processes of 23c and represents the function with the highest hierarchy. 81a is a telephone directory function image, and this position corresponds to "1" on the dial key.
” is input, the telephone directory function process is started.81b
is a registered function image, and this position corresponds to "2" on the dial key, and when the dial "2" is input, the registered function process is activated. 81c is a time registration function image, and this position corresponds to "3" on the dial key, and when the dial "3" is input, the time registration function process is activated. 81d is display ON
In the /OFF function image, this position corresponds to "4" on the dial key, and when the dial "4" is input, a display enable/disable setting process is activated to set the display to 52. 81e corresponds to the dial key "5" in the record display function image, and the dial "
When "5" is input, communication record display processing is started.8
1f represents a function end image, and in the screen 81, it means stopping the extended service function, and in other hierarchical functions, it means ending the function and returning to the previous hierarchical function. Reference numeral 82 represents a telephone directory function screen, and when dial "1" is input on the extended service function activation screen 81, the telephone directory function process is activated and the telephone directory activation screen is output on the screen. Phonebook function screen 82
Here, a telephone directory function hierarchy display 82a, a telephone directory item screen 82b showing the contents registered in the telephone directory, a cursor-up image 82c corresponding to the dial key "1" as a telephone directory function selection image, and a dial key "4" are shown. A cursor down image 82d corresponding to the dial key "3", an item selection image 82e corresponding to the dial key "3", a telephone directory function end image 82f corresponding to the dial key "6", and a cursor 82g are displayed. 82h represents a non-functional image and indicates that the corresponding key input has no function and is ignored. Cursor 82g
is moved up and down by inputting dial keys "1" and "4", and when it is on the top row of 82b, dial key "1" is pressed.
” is input, the entire item is rolled up and the next item is displayed.Similarly, when the cursor 82g is at the bottom line of 82b and the dial key ``4'' is input, it is rolled down and the next item is displayed. On the screen 82, when the cursor 82g is moved using the dial keys "1" and "4" and an item is selected using the dial key 82e, the phonebook registration content display process is started and the phonebook registration content display screen 83 is displayed. The screen 83 displays a telephone directory function hierarchy display 83a, a registration details display 83b, a registered function image 83c corresponding to the dial key "2", a dial function image 83d corresponding to the dial key "3", and a dial key "6". ” is displayed. When the dial key “3” is input on the screen 83 and the dialing function is selected, the outgoing call process is started and the outgoing call operation using the registered phone number is performed. is activated.The extended service function is terminated in order not to interfere with outgoing processing.

When the dial key "2" is input on the screen 81 and the registration function is selected, the videophone registration process is activated and the videophone registration screen 84 is displayed. On the screen 84, a videophone registration function hierarchy display 84a and a registration item display 84b are displayed.
and videophone registration function selection image as dial key "1"
Cursor up image 84c corresponding to ", cursor down image 84d corresponding to dial key "4", registration content change image 84e corresponding to dial key "3", and video phone corresponding to dial key "6" A function end image 84f and a cursor 84g are displayed.Images 84c and 84d function in the same way as images 82c and 82d.When the dial key "3" is input and the registered content change process is started, the registered items are changed. The next item candidate is registered and displayed on the screen.The registered contents are displayed cyclically by the number of candidates.

When an incoming call is received on the screen 84, an incoming call notification 84g is displayed in the extended notification display area. FIG. 9 shows the configuration of the videophone key input section. Videophone key input section is 91a
Cancel key, 91b speaker key, 91c shortcut key, 91d redial key, 91e hold key, 91f call key and dial key 91g to 91r switch between keys and voice input that were provided on conventional telephones with advanced functions. 92a audio switching key and audio input display LED 93a for requesting, 92b image switching key and image input display LED 93b for requesting switching of image input, and 92c high image quality key and coding mode display LED 93c for switching the encoding mode of the input image signal. 92d freeze key for requesting fixation of the transmitted image, LED 93d for displaying the fixed state of the transmitted image, 92e image key for requesting image transmission, image mode display LED 93e, 92f extended service activation key and monitor for starting the extended service function Additional keys required for videophone calls, such as a monitor key 92g that requests screen display, and a power display LED 93f.An incoming call display LED 93g.
It consists of The keys associated in the key-corresponding image display area are dial keys 91g to 91l.

FIG. 10 shows the key input assignment process executed by the videophone control section 23c. When the telephone control section 23e detects a key input, the video telephone control section 23c is notified and a key input assignment process is started. The key input assignment process reads the notified key information and processes the key input validity determination process (
101) to check whether the key information is valid. When the key information is valid, image-compatible key determination processing (102
) to determine whether the key information is associated with the image. When the key information is an image-compatible key, extended service function input information is assigned to the key information depending on the extended service activation state and extended service operation mode. (103,1
04, 105, 106) FIG. 11 shows a key input process for executing a process corresponding to assigned key information. The key information undergoes an input determination process (111) to perform the process that each key information requires. When the key information is an extended service activation key, extended service function activation key processing (112) is executed, and depending on the extended service function activation state and the operating state of the videophone, the extended service function is started or stopped, or the input information is ignored. . (112
a, 112b, 112c, 112d) When the key information is the videophone registration key information of the extended service function assigned by the image corresponding key assignment process (105), check the activation state of the extended service function and perform the videophone registration process. to start. (113) Furthermore, when the outgoing call processing 114 and the incoming call processing 115 are started, the activation state of the extended service function is checked, and when the extended service function is activated, the extended service stop processing is forcibly performed to use the display area in a time-sharing manner. .

FIG. 12 shows starting and stopping extended service functions and processing execution restriction conditions depending on the operating state of the videophone. As shown in Figure 12, when the videophone is in the process of connecting or disconnecting a call, the activation of the extended service function and the continuation of the process are restricted, so the operational guidance that occurs during telephone and videophone operations at this time is restricted. It is also possible to prevent the input confirmation and notification display from overlapping with the display of the extended service function.

FIG. 13 shows processing corresponding to the image key. It is possible to register whether the image transmission mode is automatic or manual, change it for each communication, and make a manual transmission request for image transmission in manual image transmission mode. Reference numeral 131 denotes a registered image transmission mode register in which the image transmission mode at the start of normal communication is registered with the videophone registration function of the extended service function. Reference numeral 132 denotes an image transmission mode register which is actually used to determine image transmission. In the register 132, the setting contents of the register 131 are reset by the call disconnection process at the end of communication. 133
displays the contents of the register 132 using the image sending mode display LED. 134 is an image key input process executed after input determination in the key input process, and when an image key is input, 13
4a, it is determined whether the videophone is communicating with a terminal capable of receiving images and whether the current communication mode is in a state where image transmission is possible. When the image transmission is possible, it is determined whether the image is being transmitted by 134b, and if the image is being transmitted, image transmission stop processing 1 is performed.
34c is executed, the image sending mode register 132 is set to manual, and the image sending mode display LED 133 is turned off. (134d, 134e) When the image is not being sent, execute the image sending process 134f and turn on the image sending mode display LED1.
33 is turned on. (134f, 134g, 134h)
When image transmission is not possible, the image transmission mode register 13
2 is read and when the automatic mode is set, the manual mode is set in the image sending mode register 132 and the image sending mode display LE
Turn off D133. When in manual mode, set the automatic mode in the image sending mode register 132 and display the image sending mode display LE.
Turn on D133. (134d, 134e, 134g
, 134i, 134j, 134k, 134l) In the videophone communication mode establishment process, when a transition to the image sending enabled state is detected, the image sending mode register 132 is read, and if the automatic mode is selected, image sending processing is executed.

FIG. 14 shows the time/communication time display process. Time/communication time processing is executed every 100 ms by a system timer interrupt, reads the time and timer value from the timer circuit 23f, and displays the time or communication time (timer value) in the upper right corner of the screen.

In the time/communication time display process, the communication state is determined by the communication state determination 141, and when no communication is in progress, the time is read from the timer circuit 23f and displayed in the HH:MM format. At this time, the timer status is checked and if it is ON, it is turned OFF. (141-145) Also, during communication, when the timer state is ON, the timer value is read from the timer circuit 23f and displayed in MMM minutes SS seconds format. (146, 14
7,148) When the timer is OFF, clear the timer value of the timer circuit 23f, set the timer to restart, and set the timer to 0 minutes 00.
Display seconds.

As described above, it is possible to register whether the image transmission mode is automatic or manual, change the transmission mode for each communication, and process a manual transmission request for image transmission in the manual image transmission mode.

[0042]

According to the present invention, the operability and functional expandability of a color moving image video telephone terminal can be significantly improved, and a man-machine interface similar to that of a conventional telephone can be provided. Furthermore, security can be improved by layering extended service functions. Many keys and setting switches can be omitted, and the system can be easily expanded, making it more economical. Furthermore, by providing an image key with a new function, it is possible to accurately reflect the user's intention to send images and protect privacy.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the appearance of an embodiment of the present invention.

FIG. 2 is a diagram showing functional blocks of an embodiment of the present invention.

FIG. 3 is a diagram showing a screen configuration of an embodiment of the present invention.

FIG. 4 is a diagram showing a monitor screen configuration according to an embodiment of the present invention.

FIG. 5 is a diagram showing a videophone operation guidance, input confirmation, and notification display screen according to an embodiment of the present invention.

FIG. 6 is a diagram showing a display example of a videophone operation guidance, input confirmation, and notification display screen according to an embodiment of the present invention.

FIG. 7 is a diagram showing the configuration of an extended service display screen according to an embodiment of the present invention.

FIG. 8 is a diagram showing a display example of an extended service display screen according to an embodiment of the present invention.

FIG. 9 is a diagram showing the configuration of a videophone key input section according to an embodiment of the present invention.

FIG. 10 is a diagram showing key input assignment processing according to an embodiment of the present invention.

FIG. 11 is a diagram showing key input processing according to an embodiment of the present invention.

FIG. 12 is a diagram showing starting and stopping of extended service functions and processing execution restriction conditions depending on the operating state of the videophone according to an embodiment of the present invention.

FIG. 13 is a diagram showing processing corresponding to an image key according to an embodiment of the present invention.

FIG. 14 is a diagram showing time/communication time display processing according to an embodiment of the present invention.

[Explanation of symbols]

11...Display section 12.
...Camera section 13...Image CODE
C section 14... Image CODEC board, 15... Communication device control board 16...
...Key panel section 17 ...Power supply section
18...Main body 19...Handset 21...Camera display unit 22...Image code decoding unit 23...
...Communication control section 24 ...Handset 25
・・・・・・Hook switch 26・・・・・・Speaker
27...Key matrix 28...Power supply
81...Extended service function startup screen 82...Telephone directory function screen 83.
... Phonebook registration details display screen

Claims (10)

[Claims] Claim 1: A video input means for inputting video, a means for encoding and decoding an image signal, a means for displaying the received and decoded image signal, a means for encoding and decoding an audio signal, and a means for encoding and decoding an audio signal. A television consisting of a means for multiplexing encoded and decoding information and transmitting and receiving it to a communication network, a means for inputting and outputting audio, a means for supplying power, and several keys for inputting dials and other function selections. A telephone terminal, comprising means for displaying and monitoring an input image signal to be transmitted and encoded on the display means, means for displaying character and graphic information on the display means, and an input image displayed on the display means. 1. A videophone terminal comprising: a signal monitor display; and means for multiplex displaying a videophone operation guidance display, notification display, or input confirmation display as character and graphic information according to the operation mode of the videophone. 2. A video input means for inputting video, a means for encoding and decoding an image signal, a means for displaying the received and decoded image signal (hereinafter referred to as a display), and a means for encoding and decoding an audio signal. A means for multiplexing audio and image encoding/decoding information and transmitting and receiving it to a communication network, a means for inputting and outputting audio (hereinafter referred to as a handset), a means for supplying power, and a device for inputting dials and other function selections. A videophone terminal consisting of the above keys, comprising means for displaying and monitoring transmitted and encoded input image signals on a display, means for displaying text and graphic information on the display, and text and graphic information display. means to improve operability by displaying guidance, notifications, and input confirmation displays for videophone operations; and support for registration and setting operations necessary for videophone operations by using text and graphic information display means, and new features. A means for activating an extended service function that provides a function, and a plurality of displays representing one of the plurality of functions or items realized by the extended service means on a display as function selection information and item selection in activating the extended service means. means for displaying images or characters, and the plurality of images thereof matching the arrangement of all or part of the arrangement of several keys for inputting dials and other function selections, and keys of the same arrangement during execution of the extended service means; A means for selecting a function or item corresponding to the image displayed at that position by pressing , a monitor display of the input image signal to be transmitted and encoded displayed on the display, and a guidance display and notification for videophone operation. 1. A videophone terminal comprising means for displaying a display, an input confirmation display, and an extended service function display multiplexed according to the operation mode of the color video videophone and the activation state of the extended service. 3. In the videophone terminal according to claim 1 or 2, in the function selection and input means provided, the functions can be directly selected when operating the videophone using keys assigned to conventional telephones and extended telephones. Alternatively, function selection or input that is desired to be input can be realized using actual keys, and multiple registration and setting items required for newly provided telephone functions and videophone functions can be created by activating extended service functions. A videophone terminal is realized by displaying an image and inputting a corresponding key. 4. In the videophone terminal of claim 3, a dial input key, an input dial cancellation key, a speaker key for requesting output and stop of received audio to a speaker, a speed key for requesting speed dialing, and a speed key requesting redialing. A redial key for requesting a hold process and a hold key for requesting hold processing are provided, a key is provided for cyclic starting/stopping when starting/stopping the extended service means, and a means for external voice input and a voice encoded input are provided. A means for switching between the microphone in the handset and an external audio input and a key for requesting the switching are provided, a means for inputting an external video, a means for switching the image encoding input between the built-in video camera and the external video input, and a key for requesting the switching are provided. a key for requesting the monitor display and stop of the encoded and transmitted input image signal; means for changing the image quality of the transmitted image; and means for displaying the image quality of the image being transmitted or scheduled to be transmitted; A key for making a request is provided, and a means for fixing (making a still image) a transmitted image, a means for displaying that the image being transmitted or scheduled to be transmitted is a fixed (still image), and a request for fixing a transmitted image are provided. A key is provided to register and change the telephone directory, make a call using the registered phone number, display, register and change multiple terminal operation modes, display communication records and make a call using the recorded phone number, control the return of received information, etc. A video telephone characterized by having a means for inputting dials or other function selections associated with a plurality of images displayed on a display by inputting several keys by an extended service means activated by an operation. terminal. 5. In the videophone terminal according to claims 2 to 4, the videophone operation guidance and notification display, the input confirmation display, the image displayed when the extended service means is started, and the image used when the extended service means is started on the display. By providing each area independently, there is a means to avoid display problems such as overlapping display areas when a call arrives and is answered when the extended service means is activated or when the extended service is activated during communication. A videophone terminal. 6. In the videophone terminal according to claims 2 to 5, the functions and items displayed in images or characters in the extended service function are configured hierarchically according to operability, frequency of use, and security, and the selection of the functions is made hierarchical. A means for displaying images or characters representing the functions in the order of selection, or images or characters representing the last selected function or item, in order to represent the selection order of the hierarchy of extended service means. A videophone terminal characterized by having means for displaying. 7. The videophone terminal according to claims 2 to 6, wherein the videophone operation guidance and notification display and the area used when activating the extended service means are displayed on the display so that they can be used in a time-sharing manner. Normally, when the need arises, videophone operation guidance and notifications are displayed, and when the extended service means is activated, images and guidance representing functions or items are displayed, and the extended service If an event that requires notification occurs during startup, such as an incoming call, an incoming call notification will be displayed in the notification-only area, and when a change in the hook switch state is detected or a transition to a communication state is detected, etc. 1. A videophone terminal comprising means for terminating or prohibiting activation of an extended service function at the start of a communication start process and at the start of a communication end process. 8. The videophone terminal according to claims 1 to 7, further comprising means for displaying the time and means for measuring and displaying communication time, wherein the area used for the time display area and the communication time display area is one area. What is claimed is: 1. A video telephone terminal characterized in that it has means for displaying the time during non-communication and displaying the communication time during communication. 9. In the color moving image videophone terminal according to claims 1 to 8, means for registering whether to automatically or manually transmit one's own image in a transmittable communication state using the extended service function. , a means for displaying registered automatic or manual image transmission mode information, and an image key are provided, and when the image key is input in a communication state where image transmission is not possible during non-communication or communication, the image transmission information is displayed. means for cyclically switching between automatic and manual information; means for automatically starting image transmission in automatic image transmission mode in image transmission enabled communication state; and means for automatically starting image transmission in manual image transmission mode in image transmission enabled communication state; means to start image transmission if the image key is input during image transmission, and means to terminate image transmission if the image key is input during image transmission, and reset the pre-registered automatic or manual image transmission mode information at the end of communication. A videophone terminal characterized in that it has means for. 10. The videophone terminal according to claims 1 to 9, further comprising means for realizing a telephone directory function, and means for displaying registered contents of the telephone directory as one of extended service means; It is characterized by having means for registering additional information, and means for making a call to a registrant selected by inputting a key corresponding to an image representing a dialing function in a telephone directory function using the registered telephone number. Videophone terminal.