JPH0338187A - Television telephone set with superimposing function - Google Patents

Abstract

PURPOSE:To prevent mutual disturbance by providing a modulation demodulation section demodulating each modulated signal respectively, using the modulation demodulation section to modulate a character signal, a picture signal, a video signal and a voice signal by a telephone set respectively and sending them simultaneously onto one communication line. CONSTITUTION:A conversion section 2 converts an electric signal comprising character information and picture information received from an input device 1 into a signal with the same frequency band and data form as those of the video signal and sends the result as a character signal and a picture signal to a modulation demodulation section 3. The modulation demodulation section 3 modulates the received character signal, picture signal, video signal and voice signal so as to avoid mutual disturbance and sends the result to a communication line 7. Moreover, the modulation demodulation section 3 demodulates the modulated character signal, picture signal, video signal and voice signal inputted from the communication line 7. Then the character signal, picture signal, video signal are sent to a receiver section 6, where they are displayed and the voice signal is sent to a telephone set 5, in which the signal is received.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a videophone.

[Conventional technology]

Traditionally, this type of videophone has text and image signals,
There was no superimpose function that transmitted camera images (and No. 3) simultaneously via a single communication line.

(Problems to be Solved by the Invention) The conventional videophone described above has a drawback in that it is difficult to transmit signals other than audio signals and video signals from a camera through a single communication line.

Therefore, the present invention solves the drawbacks listed in item L, and can simultaneously transmit text signals and image signals in addition to audio signals and video signals through one communication line without interfering with each other. . The purpose is to provide a videophone with a superimpose function.

(Means for Solving the Problems) A videophone with a superimpose function of the present invention is a videophone equipped with a camera unit that converts a video of a subject into an electrical signal and outputs it as a video signal. an input device that converts into an electrical signal; a conversion unit that receives an output from the input device, converts it into an electrical signal in the same frequency band and data format as the video signal, and outputs it as a character signal and an image signal; It receives the text signal, the image signal, the video signal, and the audio signal output from the telephone, modulates each of these so as not to interfere with each other, and sends them out to one communication line, and also transmits them through the communication line. It is equipped with a modulation/demodulation section that demodulates each modulated signal such as a character signal, an image signal, a video signal (No. 3) and an audio signal sent from the computer.

[For production]

In this way, character information and image information are converted into electrical signals of the same frequency and data format as the video signal from the camera to generate character signals and image signals, and these character signals, image signals, and video signals are , the audio signals from the telephone are modulated by the modulation/demodulation section so that they do not interfere with each other even if they are simultaneously sent out on one communication line.Also, the modulated signals of text signals, image signals, video signals, and audio signals Even if inputs are received simultaneously through one communication line, the modulation/demodulation section demodulates them respectively and displays them normally, and also receives the call.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a video telephone with a superimpose function according to the present invention.

The camera unit 4 takes a picture of the subject to be transmitted to the videophone of the communication partner and sends it to the modulation/demodulation unit 3 as a video signal. Character information and image information are input to the input device 1, converted into electrical signals, and sent to the conversion section 2. The conversion unit 2 is the input device 1
The electric signals of character information and image information received from the converter are converted into signals having the same frequency band and data format as the video signal, and are sent to the modulation/demodulation section 3 as character signals and image signals. The telephone 5 exchanges voice signals and dial signals with the telephone of the communication partner via the communication line 7 and the modulation/demodulation section 3.

The modulator/demodulator 3 modulates the received character signals, image signals, video signals, and audio signals so that they do not interfere with each other, and then sends them out to the communication line 7. In addition, the modulation/demodulation section 3
demodulates the modulated video signal, character signal, image signal, and audio signal input from the communication line 7, and sends the video signal, character signal, and image signal to the image receiver 6 for display, and the audio signal to the telephone set. 5 and have them pick up the call.

Next, the operation of this embodiment will be explained.

Text information and image information are converted into electrical signals by the input device 1 and sent to the converter 2, and the converter 2 converts the electrical signals into text and image signals in the same frequency band and data format as the video signal. Like the video signal, it is sent to the modulation/demodulation section 3 via the communication line 7. Then, the modulation/demodulation section 3 receives these video signals, character signals, image signals, and the audio signal from the telephone set 5, and modulates each of them so that they do not interfere with each other so as to transmit one communication line 7. to the other party's videophone with superimpose function.

Further, the modulation/demodulation section 3 receives and demodulates the modulated video signal, character signal, image signal, and audio signal transmitted from the videophone with superimpose function on the communication partner side, and the audio signal is sent to the telephone set 5. The other information is sent to the image receiving unit 6 for display.

Furthermore, if the other party is using a conventional videophone,
By adding the input device 1, the converter 2, and the modulation/demodulator 3 to the videophone of the other party, the videophone can be easily operated as a videophone with a superimpose function.

(Effects of the Invention) As explained above, the present invention converts character information and image information into electrical signals using an input device and sends them to the converting section, and the converting section converts these electrical signals into the same frequency band and data as the video signal. The signal is converted into a character signal or image No. 43 of the format, and sent to a modulation/demodulation unit so that it can be transmitted via a communication line through which video signals are transmitted. Then, the modulation/demodulation section modulates these video signals, text signals, image signals, and audio No. 43 from the telephone, and simultaneously sends them out through one ε wire without interfering with each other. It is effective to easily send and show homophone kanji, etc. that are difficult to convey with explanations of diagrams or a voice alone, and it also makes it easier to communicate over the phone with people who are hearing impaired using diagrams and letters. There is an effect that can be done.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of a video telephone with a superimpose function according to the present invention. DESCRIPTION OF SYMBOLS 1... Input device, 2... Conversion section, 3... Modulation/demodulation section, 4... Camera section, 5... Telephone device,
6... Image receiving section, 7... Communication line. Diagram

Claims (1)

[Claims] 1. A videophone equipped with a camera unit that converts an image of a subject into an electrical signal and outputs it as a video signal, comprising: an input device that converts text and images into electrical signals; and an input device that converts text and images into electrical signals; a conversion unit that receives the output, converts it into an electrical signal in the same frequency band and data format as the video signal, and outputs it as a character signal and an image signal; It receives the audio signals to be output, modulates each of them so that they do not interfere with each other, and sends them out on a single communication line.It also modulates each of these signals so that they do not interfere with each other and sends them out on a single communication line. A videophone with a superimpose function, comprising a modulation/demodulation section that demodulates each modulated signal of an audio signal.