JPH0823528A - Video telephone set - Google Patents

Abstract

PURPOSE:To provide a video telephone set whose constitution is simplified capable of superimposing character information on video signals to be transmitted to the opposite party of communication and the video signals to be displayed on the present terminal side of the communication. CONSTITUTION:This telephone set is provided with a changeover switch 42 for switching the video signals inputted to a character synthesis processing part 22 for superimposing the character information to the video signals to be transmitted to the opposite party of the communication or the video signals to be displayed on the present terminal side of the communication, the changeover switch 41 for selecting whether the video signals to be transmitted to the opposite party of the communication are the video signals to which the character information is to be superimposed or the video signals to which the character information is not to be superimposed and the changeover switch 43 for switching whether or not to select the video signals to which the character information is superimposed for the video signals to be displayed on the present terminal side of the communication. A character pattern generator 28 for generating the character information to be superimposed on the video signals and the character synthesis processing part 22 are shared by a transmission system and a reception system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention encodes a video signal,
The present invention relates to a videophone that communicates with a video signal that can be superimposed on a video signal that is sent to a communication partner and a video signal that is displayed on the terminal side of the communication.

[0002]

2. Description of the Related Art FIG. 4 is a schematic block diagram showing an entire conventional videophone. In FIG. 4, 1 is a video camera, 2 is a video signal processing unit, 3 is a video encoding unit,
4 is a data multiplexer / separator, 5 is a handset transmitter, 6
Is an audio signal processing unit, 7 is an audio encoding unit, 8 is a transmission processing unit, 9 is a line input / output terminal, 10 is a video decoding unit, 11 is an audio decoding unit, 12 is a video monitor, and 13 is a handset receiver. is there.

An outline of the operation of the conventional videophone shown in FIG. 4 will be described. First, the transmission operation will be described.
In the figure, the video signal output from the video camera 1 is input to the video signal processing unit 2, and after YC separation and A / D conversion are performed in the video signal processing unit 2, a speed suitable for encoding is set. Is sent to the video coding unit 3 in the format. The data input to the video encoding unit 3 is compressed in a data amount by high-efficiency encoding, and then the data multiplexing / demultiplexing unit 4
Sent to.

On the other hand, the voice signal output from the handset transmitter 5 is input to the voice signal processing unit 6, where it is subjected to filtering, gain adjustment, etc., and then sent to the voice encoding unit 7. The voice signal input to the voice encoding unit 7 is converted into digital data, subjected to high efficiency encoding if necessary, and then sent to the data multiplexing / demultiplexing unit 4.

The video data and audio data input to the data multiplexer / demultiplexer 4 are time-division multiplexed according to a predetermined multiple framing format and sent to the transmission processor 8 as a serial data string. The data input to the transmission processing unit 8 is subjected to processing such as transmission framing so as to be suitable for the transmission line used, and then sent from the line input / output terminal 9 to the other party of the communication.

Next, the receiving operation will be described. The received data input from the line input / output terminal 9 is transferred to the transmission processing unit 8
After the processing such as transmission framing for the transmission line is canceled at, the data is sent to the data multiplexer / demultiplexer 4. The data input to the data multiplexing / demultiplexing unit 4 is video data and audio data that are multiplexed according to a predetermined multiple framing format, and are separated into the video decoding unit 10 and the audio decoding unit 11. Sent.

The data input to the video decoding unit 10 is
The data amount is expanded by the high-efficiency decoding process and then sent to the video signal processing unit 2. The data input to the video signal processing unit 2 is subjected to processing such as D / A conversion and YC synthesis, output as a video signal, and sent to the video monitor 12 displayed on the terminal side of communication.

On the other hand, the data input to the voice decoding unit 11 is converted into a voice signal by a decoding process and sent to the voice signal processing unit 6. The voice signal from the voice decoding unit 11 input to the voice signal processing unit 6 is output to the handset receiver 13 after being subjected to processing such as gain adjustment, and the voice from the other party of communication can be heard. The above is the outline of the entire operation of the conventional videophone.

Next, when the above-described conventional television telephone is to have a function of superimposing character information on the video signal to be sent to the other party of communication and the video signal to be displayed on the own terminal side of communication. As the internal configuration of the video signal processing unit 2 of FIG. 4, the configuration block diagram shown in FIG. 5 can be considered.

The video signal processing unit of the videophone shown in FIG. 5 will be described below. First, the transmission operation will be described. In the figure, the video signal output from the video camera input from the transmission video input terminal 20 is level-adjusted by the video amplifier 21 and sent to the character synthesizing processing unit 22a. (1) When text information is not superimposed on the video signal sent to the other party of communication. The character motion control unit 27 recognizes that the mode is the above mode, and the video signal input to the character synthesis processing unit 22a is directly sent to the YC separation unit 23 without any processing. The video signal input to the YC separation unit 23 is separated into a luminance signal and a color component signal, each of which is an A / D conversion unit 24.
Is converted into digital data in the video input frame memory section 25, and is stored in the video input frame memory section 25 and sent to the video coding section 3 from the transmission frame memory output terminal 26 in accordance with the format for the next coding processing.

(2) When text information is superimposed on a video signal sent to a communication partner. The character movement control unit 27 recognizes that the mode is the above mode, and transmits information to the character synthesis processing unit 22a and the character pattern generator 28a. The character pattern generator 28a sends the character information to be superimposed on the video signal sent to the other party of communication to the character synthesis processing unit 22a. The character synthesizing processing unit 22a superimposes the character information on the input video signal to be sent to the communication partner. After that, the operation sent from the YC separation unit 23 to the video encoding unit 3 from the video input frame memory output terminal 26 is the same as that described in (1) above.

Next, the receiving operation will be described. Paying attention to the video signal displayed on the own terminal side of the communication, the video decoded data input from the video output frame memory input terminal 29 of the video signal processing unit is the video output frame memory unit 3.
It is stored in 0, converted into an analog signal by the D / A conversion unit 31, and the YC synthesis unit 32 performs signal synthesis of luminance and color components, and then sent to the character synthesis processing unit 22b. (3) When text information is not superimposed on the video signal displayed on the terminal side of communication. When the character motion control unit 27 recognizes that the mode is the above mode, the character synthesizing processing unit 22b does not perform any processing on the video signal sent from the other party of communication and displayed on the terminal side of the communication, and the video amplifier 21 as it is. To the monitor video output terminal 33 to be displayed on the own terminal side of the communication.

(4) When text information is superimposed on a video signal displayed on the terminal side of communication. The character motion control unit 27 recognizes that the mode is the above mode, and transmits the information to the character synthesis processing unit 22b and the character pattern generator 28b. The character pattern generator 28b sends the character information to be superimposed on the video signal displayed on the terminal side of the communication to the character synthesizing processing unit 22b. The character synthesizing processing unit 22b superimposes the above-mentioned character information on a video signal sent from the other party of communication and displayed on the terminal side of the communication, and outputs it to the monitor video output terminal 33.

[0014]

The conventional videophone is constructed as described above and superimposes character information on the video signal sent to the other party of communication, or the own terminal of the communication is required by the receiver. In order to superimpose character information on the video signal displayed on the side, it is necessary to provide the character pattern generator and the character composition processing unit of the video signal processing unit of the videophone in the transmission system and the reception system, respectively, and control them. However, there was a problem that the configuration became complicated.

The present invention has been made to solve the above problems, and superimposes character information on a video signal sent to a communication partner, or displays it on the terminal side of the communication as required by the receiver. It is an object of the present invention to obtain a videophone in which character information can be superimposed on a video signal to be displayed and the configuration is simplified.

[0016]

In order to achieve the above object, the invention according to claim 1 encodes a video signal,
In the communicating video telephone, only one character information generating means and one character combining processing means for superimposing the character information generated from the character information generating means on the video signal,
As a video signal input to the character synthesizing processing means, a video selection means for selecting a video signal to be sent to a communication partner or a video signal to be displayed on the own terminal side of the communication, and a character as a video signal to be sent to the communication partner. The video signal with the characters superimposed or the video signal with the characters superimposed, and the transmission image selection means for selecting whether the video signal with the characters superimposed or the video signal without the characters superimposed. A reception video selection means for selecting whether there is no video signal, and switching the video signal to be sent to the other party of communication and the video signal to be displayed on the own terminal side of the communication so as to superimpose character information. .

Further, in the invention according to claim 2, in a videophone for encoding and communicating a video signal, only one character information generating means for generating character information, and the character information in the video signal sent to the other party of communication. A transmitting side character synthesizing processing means for superimposing the character information generated from the generating means, and a receiving side character synthesizing processing means for superimposing the character information generated by the character information generating means on a video signal displayed on the communication terminal side. Video selection means for selecting a video signal to be sent to the other party of communication or a video signal to be displayed on the own terminal side of the communication, as the video signals to be input to the transmission side character synthesis processing means and the reception side character synthesis processing means, respectively. A transmission image selection means for selecting a video signal with characters superimposed or a video signal with no characters superimposed as a video signal to be transmitted to the other party of communication, and display on the communication own terminal side The video signal to be transmitted to the other party of communication and the video signal to be transmitted to the other party of communication are displayed on the terminal side of the communication. The same character information is superimposed on the video signal to be displayed.

[0018]

In the invention according to claim 1 configured as described above, in a videophone for encoding and communicating a video signal, a video signal to be sent to the other party of communication as a video signal to be inputted to the character synthesizing processing means, A video selecting means for selecting whether the video signal is to be displayed on the own terminal side of communication, and a video signal in which characters are superimposed as a video signal to be sent to the other party of communication,
As a transmission video selection means for selecting whether the video signal does not include characters and a video signal to be displayed on the own terminal side of communication,
A video signal to be sent to the other party of communication, and a video signal to be displayed on the own terminal side of the communication, comprising: a received video selection means for selecting whether the video signal has characters superimposed or the video signal without characters superposed. The character information generating means for generating the character information and the character synthesizing processing means for superimposing the character information generated by the character information generating means on the video signal are provided on the transmitting side. And can be shared on the receiving side.

Further, in the invention according to claim 2, in a videophone for encoding a video signal and performing communication, the character information generated from the character information generating means is superimposed on the video signal to be transmitted to the other party of communication, and the character synthesis on the transmitting side is performed. Processing means, receiving side character synthesizing processing means for superimposing character information generated from the character information generating means on a video signal displayed on the terminal side of communication, transmitting side character synthesizing processing means and receiving side character synthesizing processing means The video signal to be input to each of the video signals to be sent to the other party of communication or the video signal to be displayed on the own terminal side of the communication, and the video with characters superimposed as the video signal to be sent to the other party of communication. A transmission video selection means for selecting a signal or a video signal in which characters are not superimposed,
A video signal to be sent to the other party of communication, comprising a video image signal on which characters are superimposed or a video signal on which characters are not superimposed is selected as a video signal to be displayed on the terminal side of communication, Since the same character information is superimposed on the video signal displayed on the terminal side of the communication, the character information generating means for generating the character information can be shared between the transmitting side and the receiving side.

[0020]

【Example】

Example 1. Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 4 is an overall schematic block diagram showing a first embodiment of the video telephone according to the present invention. Description of common parts with conventional videophones is omitted, and means for superimposing text information on the video signal sent to the other party of the communication, or when receiving, text is displayed on the video signal displayed on the own terminal side of the communication as required by the recipient. The means for superimposing information will be described below. FIG.
5 is a block diagram of an internal configuration of a video signal processing unit of the video telephone of FIG. In FIG. 1, reference numeral 22 denotes a character synthesizing processing unit which is means for superimposing character information on a video signal sent to a communication partner or on a video signal displayed on the own terminal side of communication,
A character pattern generator 28 is a character information generating means for generating character information to be superimposed on the video signal. Reference numeral 40 denotes the following three types of switches, that is, the transmission video changeover switch 4 which is a means for selecting a video signal to be transmitted to the other party of communication, depending on the operation mode of the videophone recognized by the character movement control unit 27.
1. Switch control for controlling a character superposed video changeover switch 42 which is a means for selecting a video signal input to the character synthesizing processing means and a monitor video changeover switch 43 which is a means for selecting a video signal to be displayed on the own terminal side of communication. It is a department. Four
Reference numeral 4 is a background image generation unit that generates a background image signal that is used specially as a video signal on which text information is superimposed.

FIG. 2 is a diagram for explaining the operation of the first embodiment of the present invention shown in FIG. 1 in order to simplify the description.
FIG. 7 is a diagram for explaining a case where the contacts of FIG. 3 are always connected to the E side and the G side, respectively.

First, in order to clarify the operation of the transmission image changeover switch 41, description will be given with reference to FIG. (1) When text information is not superimposed on the video signal sent to the other party of communication. When the character movement control unit 27 recognizes that this mode is set, the information is transmitted to the switch control unit 40, and the contact of the transmission image changeover switch 41 is connected to the A side. The video signal output from the video camera input from the transmission video input terminal 20 is directly passed through the video amplifier 21 to the YC separation unit 23, the A / D conversion unit 24, the video input frame memory unit 2
Then, the signal is sent from the transmission frame memory output terminal 26 to the next video coding unit via the frame 5.

(2) When text information is superimposed on a video signal sent to a communication partner. Recognizing that the character motion control unit 27 is in this mode, the switch control unit 40, and
Information is transmitted to the character synthesis processing unit 22 and the character pattern generator 28. At this time, the switch control unit 40 connects the contact point of the transmission video changeover switch 41 to the B side, and the character pattern generator 28 sends the character information of the message content to be sent to the other party of communication to the character synthesis processing unit 22. Character synthesis processing unit 22
Can be sent to the other party of the communication by superimposing the above character information on the input video signal (in this case, the received video signal from the other party of the communication), and to the video output terminal for the monitor displayed on the own terminal side of the communication. Can be sent. This application is useful, for example, when the receiver adds some comment as character information to the video received from the communication partner while watching the monitor video displayed on the terminal side of the communication.

In the above description with reference to FIG. 2, the video signal transmitted to the communication partner is always fixed to the received video signal from the communication partner input from the video output frame memory section input terminal 29. Therefore, the character superimposition video changeover switch 42, which is a means for selecting a video signal to be input to the character synthesis processing unit 22, and the monitor video changeover switch 4, which is a means for selecting a received video signal to be displayed on the own terminal side of communication.
The operation of the first embodiment will be described with reference to FIG.

First, the operation during transmission will be described. (3) When text information is superimposed on the video signal sent to the communication partner. The character operation control unit 27 recognizes that this mode is set, and transmits the information to the switch control unit 40, the character synthesis processing unit 22 and the character pattern generator 28. At this time, under the control of the switch control unit 40, the contact of the transmission video changeover switch 41 is connected to the B side, and the character pattern generator 28 converts the character information of the message contents to be sent to the other party of the communication into the character synthesizing processing unit 22. Send to. Character synthesis processing unit 2
2 can superimpose the above character information on the input video signal and send it to the other party of communication. Here, the character composition processing unit 2
The above-mentioned video signal input to 2 is transmitted by inputting a video signal when the contact of the character superposed video changeover switch 42, which is a video selection means, is connected to the C side, D side, or E side under the control of the switch control section 40. One of the video signal output from the video camera, the video signal output from the background video generator 44, or the reception video signal sent from the other party of the output of the YC synthesizing unit 32 described above is selected from the 20. It is possible to superimpose character information on the selected video signal and send it to the other party of communication. Further, under the control of the switch control unit 40, the monitor image changeover switch 4 which is a received image selection unit to be displayed on the communication own terminal side.
If the contact point 3 is connected to the G side, there is an advantage that the video signal on which the character information transmitted to the communication partner is superimposed can be constantly monitored.

Next, the operation at the time of reception will be described. (4) When the receiver superimposes character information on the video signal displayed on the own terminal side of the communication as necessary. Character movement control unit 27
Recognizes that it is in this mode, and the switch control unit 4
0, and information is transmitted to the character synthesis processing unit 22 and the character pattern generator 28. At this time, under the control of the switch control unit 40, the contact of the monitor video changeover switch 43, which is a means for selecting the received video, is connected to the G side, and the video signal selection means for inputting to the character synthesis processing unit 22 is used. The contact of a certain character superposition changeover switch 42 is connected to the E side, and the character pattern generator 28 sends character information to be superposed on the video signal displayed on the own terminal side of the communication to the character synthesizing processing unit 22. The character synthesizing processing unit 22 can superimpose the above-mentioned character information on the input video signal and send it to the monitor video output terminal for displaying on the own terminal side of communication.

Example 2. A second embodiment of the present invention will be described. Second Embodiment FIG. 4 is an overall schematic block diagram showing a second embodiment of a video telephone according to the present invention. Description of common parts with conventional videophones is omitted, and means for superimposing text information on the video signal sent to the other party of the communication, or when receiving, text is displayed on the video signal displayed on the own terminal side of the communication as required by the recipient. The means for superimposing information will be described below. FIG.
5 is a block diagram of an internal configuration of a video signal processing unit of the video telephone of FIG. In FIG. 3, reference numeral 22a denotes a transmitting side character synthesizing unit which is means for superimposing character information on a video signal to be sent to a communication partner, and 22b is means for superimposing character information on a video signal to be displayed on the own terminal side of communication. It is a character synthesis processing unit on the receiving side. Reference numeral 28 denotes a character pattern generator which is character information generating means for generating character information to be superimposed on a video signal to be sent to the other party of the communication or a video signal to be displayed on the own terminal side of the communication. Reference numeral 40 denotes the following four types of switches depending on the operation mode of the video telephone recognized by the character movement control unit 27, that is, a transmission video changeover switch 41 which is a means for selecting a video signal to be sent to the other party of communication, and two character composition processing means. The switch control unit controls the character-superimposed video changeover switches 42a and 42b, which are means for selecting a video signal to be input to the device, and the monitor video changeover switch 43, which is means for selecting a video signal to be displayed on the own terminal side of communication. Reference numeral 44 is a background image generation unit that generates a background image signal used specially as a video signal on which text information is superimposed. The other parts are the same as or equivalent to those in FIG. 1 showing the first embodiment, and the same reference numerals are given and the description thereof is omitted.

The operation of the second embodiment of the present invention will be described below with reference to FIG. First, the operation during transmission will be described. (1) When text information is not superimposed on the video signal sent to the other party of communication. When the character movement control unit 27 recognizes that this mode is set, the information is transmitted to the switch control unit 40, and the contact of the transmission image changeover switch 41 is connected to the A side. The video signal output from the video camera input from the transmission video input terminal 20 is output to the transmission frame memory through the video amplifier 21a, the YC separation unit 23, the A / D conversion unit 24, and the video input frame memory unit 25. It is sent from the terminal 26 to the next video encoding unit.

(2) When text information is superimposed on a video signal sent to the other party of communication. Recognizing that the character motion control unit 27 is in this mode, the switch control unit 40, and
Transmission side character synthesis processing unit 22a and character pattern generator 28
Communicate information to. At this time, under the control of the switch control unit 40, the contact point of the transmission image changeover switch 41 is connected to the B side, and the character pattern generator 28 transmits the character information of the message content to be transmitted to the communication partner to the transmission side character synthesizing process. Send to section 22a. The transmission-side character synthesis processing unit 22a can superimpose the above-mentioned character information on the input video signal and send it to the communication partner. Here, the video signal input to the transmission side character synthesizing processing unit 22a is controlled by the control signal from the switch control unit 40 so that the contact point of the character superposed video changeover switch 42a is C
It is possible to select either the output video signal of the video camera input from the transmission video input terminal 20 or the output video signal of the background video generator 44 by switching to the D side or the D side. It is possible to superimpose character information on the video signal and send it to the other party of communication. Further, when the contact of the monitor image changeover switch 43, which is the received image selection means, is connected to the G side by the control signal from the switch control unit 40, the image signal superposed with the character information to be sent to the other party of the communication is transmitted to the communication own terminal. It can be sent to the monitor video output terminal displayed on the side.

Next, the operation at the time of reception will be described. (3) In the case where the character information required by the receiver is not superimposed on the video signal displayed on the own terminal side of communication. Character movement control unit 2
7 recognizes that this mode is set, and the switch control unit 4
The information is transmitted to 0 and the contact of the monitor video changeover switch 43 is connected to the F side. Video output Frame memory input terminal 2
The video decoded data input from 9 is stored in the video output frame memory unit 30, converted into an analog signal by the D / A conversion unit 31, and the YC synthesis unit 32 synthesizes the luminance and color components. After that, the video is output to the monitor video output terminal 33 which is displayed on the side of the communication terminal itself. (4) When the receiver superimposes character information on the video signal displayed on the own terminal side of the communication as necessary. Character movement control unit 27
Recognizes that it is in this mode, and the switch control unit 4
0, and information is transmitted to the character synthesis processing unit 22b on the receiving side and the character pattern generator 28. At this time, by the control of the switch control unit 40, the contact of the monitor image changeover switch 43, which is a unit for selecting a received image, is connected to the G side, and the image signal selecting unit for inputting to the receiving side character synthesizing processing unit 22b. Is connected to the D side, and the character pattern generator 28 sends the character information to be superimposed on the video signal displayed on the terminal side of the communication to the receiving side character synthesizing processing unit 22b. . Here, the video signal input to the receiving-side character synthesis processing unit 22b is controlled by the switch control unit 40 so that the character-superimposed video changeover switch 4 is operated.
By connecting the contact of 2b to the C side or the D side, it is possible to select either the output video signal of the background video generator 44 or the received video output from the YC synthesis unit 32. It is possible to superimpose text information on a video signal and send it to a monitor that is displayed on the communication terminal side.

[0031]

As described above, according to the first aspect of the present invention, in the videophone for encoding and communicating the video signal, the video signal to be input to the character synthesizing processing means is the video signal to be sent to the communication partner. , A video selection means for selecting whether to display the video signal on the terminal side of the communication, and a transmission for selecting, as the video signal to be sent to the other party of the communication, a video signal with characters superimposed or a video signal without characters superimposed The other party of the communication is provided with video selection means and reception video selection means for selecting, as a video signal to be displayed on the own terminal side of communication, a video signal on which characters are superimposed or a video signal on which characters are not superimposed. It is possible to superimpose character information by switching the video signal to be sent to the video signal and the video signal to be displayed on the own terminal side of the communication, and it is possible to obtain a videophone with a simplified configuration.

According to the second aspect of the present invention, in the video telephone for encoding and communicating the video signal, the transmitting side for superimposing the character information generated from the character information generating means on the video signal sent to the other party of communication. Character combining processing means, receiving side character combining processing means for superimposing character information generated from the character information generating means on a video signal displayed on the terminal side of communication, transmitting side character combining processing means and receiving side character combining As the video signal input to the processing means, the video selection means for selecting the video signal to be sent to the communication partner or the video signal to be displayed on the own terminal side of the communication, and the characters to be superimposed as the video signal to be sent to the communication partner Video signal with superimposed characters as a video signal to be displayed on the terminal side of the transmission, and a transmission video selecting means for selecting whether the video signal is a video signal with which the character is superimposed or a video signal with no characters superimposed. , And a received image selection means for selecting whether the image signal does not have characters superimposed, and the same character information is superimposed on the image signal sent to the other party of communication and the image signal displayed on the own terminal side of communication. Therefore, it is possible to obtain a video telephone having a simplified configuration.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a video signal processing unit of a videophone according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining an operation of a video signal processing unit of the video phone of FIG.

FIG. 3 is a configuration block diagram of a video signal processing unit of a videophone showing a second embodiment of the present invention.

FIG. 4 is an overall schematic block diagram common to the present invention and a conventionally considered videophone.

FIG. 5 is a configuration block diagram of a video signal processing unit considered as a conventional video telephone.

[Explanation of symbols]

 22, 22a, 22b Character composition processing unit 27 Character operation control unit 28 Character pattern generator 40 Switch control unit 41 Transmission image changeover switch 42, 42a, 42b Character superimposed image changeover switch 43 Monitor image changeover switch 44 Background image generation unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Matsui 1-6, Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Yasuhiro Tomita 1-6, Uchiyuki-cho, Chiyoda-ku, Tokyo Nihonhon Telegraph and Telephone Corporation (72) Inventor Koji Honda 2-25 Sakaemachi, Koriyama City Mitsubishi Electric Corporation Koriyama Works (72) Hiroshi Takano 2-25 Sakaemachi, Koriyama City Mitsubishi Electric Corporation Koriyama Inside the Works (72) Inventor Masao Arita 2-25 Sakaemachi, Koriyama City Mitsubishi Electric Corporation Inside the Koriyama Works

Claims (2)

[Claims] 1. A video telephone for encoding and communicating a video signal, comprising: a single character information generating means; and a single character synthesizing processing means for superimposing character information generated from the character information generating means on the video signal. As the video signal input to the character synthesizing processing means, a video selection means for selecting a video signal to be sent to a communication partner or a video signal to be displayed on the communication own terminal side, and a video signal to be sent to the communication partner, A transmission video selection means for selecting a video signal with characters superimposed or a video signal without characters superimposed, and a video signal with characters superimposed or a character superimposed as a video signal to be displayed on the communication terminal side. And a video signal to be sent to the other party of communication and a video signal to be displayed on the own terminal side of the communication by superposing character information. TV phone that features the door. 2. A video telephone for encoding and communicating a video signal, wherein only one character information generating means for generating character information and character information generated by the character information generating means are included in a video signal sent to a communication partner. A transmitting side character synthesizing processing means for superimposing, a receiving side character synthesizing processing means for superimposing character information generated from the character information generating means on a video signal to be displayed on the own terminal side of communication, and a transmitting side character synthesizing processing means As the video signal to be input to the receiving side character synthesizing processing means, the video signal to be sent to the other party of communication or the video signal to be displayed on the own terminal side of the communication, and the video signal to be sent to the other party of communication. , A transmission video selection means for selecting a video signal on which characters are superimposed or a video signal on which characters are not superimposed, and a character as a video signal to be displayed on the own terminal side of communication. A reception video selection means for selecting whether the video signal is superposed or the video signal in which characters are not superposed, and the video signal sent to the other party of the communication and the video signal displayed on the own terminal side of the communication are the same. A video phone characterized by superimposing character information.