JPH01236789A - Video telephone - Google Patents

Abstract

PURPOSE:To shorten the use time of a camera and to prevent turning-off of a power source from being forgotten to extend the life of the camera by turning on/off the power source, which supplies power to the camera constituting a video telephone, in accordance with a hang-up switch of a receiver. CONSTITUTION:Power to be supplied to a camera 1 by which an image to be transmitted to the destination is obtained is supplied from a power supply circuit 9 through a power switching relay 6 and a signal processing circuit 8. The relay 6 is switched in accordance with the hang-up switch of a telephone set 7. That is, power is supplied to the camera 1 and the circuit 8 only when the receiver is hooked off. A power switch 5 is the main power switch of the telephone main body; and with respect to flow of a signal, the output signal of the camera 1 is A/D-converted by the circuit 8 and is quantized and is stored in a memory and is D/A-converted and is subjected to amplitude modulation and flows to a switching relay 10. A voice signal is connected to the relay 10 from the telephone set 7, and voice and image signals are transmitted to the destination through the relay 10 and a telephone line 11.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to videophones in the field of telephone network communication.

Conventional technology In recent years, telephone network communications have been used not only for voice transmission, but also for text transmission and image transmission. , so-called videophones that transmit the face of the person on the other end of the phone are attracting attention.

An example of the conventional videophone mentioned above will be described below with reference to the drawings.

An example of a conventional videophone will be explained with reference to FIG. In FIG. 2, numeral 1 is a camera for taking images to be transmitted to the other party on the phone. 2 is a cathode ray tube that monitors the image to be transmitted and displays the image transmitted from the other party. 3 is a handset, 5 is a power switch for devices other than telephones, such as camera 1 and cathode ray tube 2.
In Sochi.

Ru. 4 is the camera angle of camera 1.

The operation of the videophone configured as described above will be explained below.

The camera 1 used for videophone calls is generally an inexpensive business camera. However, this business controller has a short lifespan (currently about 1,000 hours. If you calculate that it is used for 1 hour/1 day, the lifespan is only about 3 years (too short for a telephone. Therefore, in the past, The camera cover 4 in Figure 1 allows you to use the camera by opening it only when using it.
Alternatively, consideration is given to shortening the usage time of the camera by closing the power switch 5 only when the camera is used.

Problems to be Solved by the Invention As is clear from the above description of the prior art, the conventional configuration has the inconvenience of having to open and close the camera cover 4 by mechanical means, and the inconvenience of having to open and close the power switch. There were problems such as the inconvenience and hassle of not having to open and close the lid, and forgetting to open and close it.

In view of the above-mentioned problems, the present invention provides a videophone with a long service life by automatically opening and closing the power supply to the camera, thereby reliably reducing the usage time of the camera.

Means for Solving the Problems In order to solve the above problems, the videophone of the present invention is characterized in that the opening/closing of the power supply to the camera is linked to the hang-up switch of the handset. It is.

Effects of the present invention With the above-described configuration, the power supply to the camera is closed only when using the videophone, so it is possible to use the camera for a minimum amount of time, and the lifespan of the videophone can be reliably extended. Become.

EMBODIMENT A video telephone according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a videophone according to an embodiment of the present invention.

In Figure 1, 1 is a camera, 5 is a power switch, and 6 is a camera.
is a power switch relay, 7 is a telephone, 8 is a signal processing circuit, 9
1 is a power supply circuit, 10 is a switching relay, and 11 is a telephone line.

In FIG. 1, a camera 1 is used to take images to be transmitted to the other end of the telephone call. Power is supplied to the camera 1 from a power supply circuit 9 via a power switch relay 6 and a signal processing circuit 8. Note that the power supply opening/closing relay 6 opens and closes in conjunction with the hang-up switch of the telephone 7. In other words, power is supplied to the camera 1 and the signal processing circuit 8 and they operate only while the handset is picked up. The power switch 5 is the main power switch of the videophone main body. In addition, the signal flow is such that the output signal of the camera 1 is sent to the signal processing circuit 8.
is A/D converted, quantized, stored in memory, and re-displayed in D.
/A conversion, amplitude modulation, and the switching relay 10, and the audio signal is connected from the telephone 7 to the switching relay 10, so that the audio and O image signals are transmitted via the switching relay 10 to the telephone line 11 to the other party. transmitted. The purpose of the signal processing circuit 8 is to band-convert the video signal of the camera 1, which has a band of several MHz within the band of a general telephone line of 3.4 Hz.

Effects of the Invention As described above, according to the present invention, the opening and closing of the power supply to the camera is linked with the hang-up switch of the handset, so that the opening and closing of the power supply to the camera is minimized. Automatically and reliably, this makes it possible to extend the life of the camera.It also has the advantage of preventing forgetting to turn off the power.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a videophone according to an embodiment of the present invention, and FIG. 2 is a conceptual diagram of a conventional videophone. 1...Camera, 6...Power switching relay, 7...Telephone, 8...Signal processing circuit, 9...Power supply circuit.

Claims (1)

[Claims] A camera, a signal processing circuit that converts the output signal of the camera into a band of a telephone communication line, and at least switching means for supplying power to the camera; A videophone characterized by being linked.