JPH03126392A - Still picture video telephone set - Google Patents

Abstract

PURPOSE:To control the fetch of a picture and transmission with a switch circuit in the inside of a camera section by providing a circuit discriminating a superimposing signal from a mixer circuit connected to a main body, sending the picture signal to a camera input storage section and sending a control signal to a common control section. CONSTITUTION:When a switch 13 in a camera section 10 is operated, a picture fetch control signal is generated and superimposed on a picture signal from a camera main body 11 and sent to a discrimination circuit 15 through a cable. The discrimination circuit 15 sends a picture signal to the camera input memory 2 from the superimposing signal and sends a picture fetch control signal to a common control section 6 and they are stored in the camera input memory 2. When a switch 14 is operated, a readout transmission control signal is generated and superimposed on the picture signal at a mixer circuit 12 and the discrimination circuit 15 sends the readout transmission control signal to the common control section 6. The common control section 6 reads the still picture data stored in the memory 2 and sends it to a communication circuit from a transmission control section 8. Thus, the switches 13, 14 in the camera section 10 control the picture fetch and transmission.

Description

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

[Conventional technology]

Conventional still image video telephones have a configuration in which image capture control and image transmission control are performed by an operator operating a switch or the like on the still image video telephone main body.

Next, a conventional still image videophone will be described with reference to the drawings.

FIG. 2 is a block diagram showing an example of a conventional still picture video telephone.

In FIG. 2, video signals from a conventional still picture video telephone camera body 11 are input to a camera input memory 2 via a cable and are sequentially stored.

Normally, the camera input memory 2 is sequentially rewritten and updated with new video signals input from the camera body 11 every frame time. At the same time, camera input memory 2
The contents are sequentially read out in synchronization with the screen display timing of the display section 3 to generate a video signal. Video signal is switching circuit 4
It is sent to the display section 3 via. As described above, the input signal from the camera body 11 is normally displayed on the display section 3 as a moving image.

On the other hand, when the switch 5 that controls image capture is operated by the operator, the common control unit 6 stops writing the video signal from the camera body 11 to the camera input memory 2, and the switch 5 is operated. The camera input image at the time is fixedly stored in the camera input memory 2 as still image data. When the switch 5 is operated again, writing of the video signal is resumed, the normal state is returned, and a moving image is displayed on the display section 3.

Furthermore, when the operator operates the switch 7 that controls transmission, the common control unit 6 stops writing the video signal to the camera input memory 2 and writes the still image data in the same manner as when the switch 5 is operated. This is fixedly stored in the camera input memory 2. Thereafter, the common control unit 6 sequentially reads out the still image data stored in the camera input memory 2 in synchronization with the transmission speed to the communication line, and the transmission control unit 8 modulates the still image data into a transmission signal format to transmit the data to the communication line. Send to.

[Problem to be solved by the invention]

The above-mentioned conventional still image videophone is configured such that image capture control and image transmission control are performed by the operator's operation of a switch or the like on the still image videophone. It is difficult to operate when used separately, and when a control switch etc. is installed on the camera body, the video signal and control signal are sent as separate signals to the still image videophone unit. This has the disadvantage that the cable diameter becomes thicker, resulting in poor operability.

[Means to solve the problem]

A still image videophone according to the present invention includes a camera unit including a camera body, a camera input storage unit that stores still image data of an image signal captured by the camera body, and a common control unit that controls the entire camera body. The camera section includes a switch circuit that generates a control signal for commanding the camera body to capture an image and a command for transmitting still image data from the camera input storage section to a communication line, and an image signal from the camera body. and a mixing circuit that sends a superimposed signal on which the control signal is superimposed to the main body section via a cable, and the main body section transfers the image signal from the superimposed signal from the mixing circuit to the camera input storage section. It also has a discrimination circuit that discriminates and sends control signals to the common control section.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, the still image videophone of this embodiment has a second
Components that are the same as the conventional still image videophone shown in the figure are given the same numbers, and components that are different from the conventional still image videophone are a switch 13 included in the camera unit 10 that generates a control signal for image capture. , a switch 14 that generates a readout and transmission control signal to send the still image data stored in the camera input memory 2 to the transmission control unit 8, a video signal from the camera body 11, an image capture control signal, and a readout and transmission control signal. A mixing circuit 12 sends out a superimposed signal to the still picture video telephone main body 20 via a cable, and a video signal from the superimposed signal from the camera section 10 included in the still picture video telephone main body 20 is used for camera input. and a discrimination circuit 15 that discriminates and sends an image capture control signal to the memory 2 and a readout transmission control signal to the common control section.

Next, the operation of this embodiment will be explained.

Similar to the operation of switch 5 and switch 7 of the conventional still image videophone shown in FIG. A signal is generated and superimposed on the image signal from the camera body 11 in the mixing circuit 12, and the superimposed signal is sent to the discrimination circuit 15 via a cable.

The discrimination circuit 15 discriminates the image signal from the superimposed signal and sends it to the camera input memory 2, and sends an image capture control signal to the common control section 6.

As in the conventional case, the common control section 6 stores the image signal from the discrimination circuit 15 in the camera input memory 2 as still image data. When the switch 13 is operated again, the normal state is returned.

Next, when the operator operates the switch 14, a still image data readout and transmission control signal is generated, and as in the case described above, the mixing circuit 12 generates a superimposed signal in which the readout and transmission control signal is superimposed on the image signal. is connected to the discrimination circuit 1 via the cable.
Sent to 5. The discrimination circuit 15 sends a read transmission control signal to the common control section 6.

The common control unit 6 sequentially reads the still image data stored in the camera input memory 2 in synchronization with the transmission speed to the communication line, modulates it into a transmission signal format in the transmission control unit 8, and sends it out to the communication line. . When the switch 14 is operated again, the normal state returns.

〔Effect of the invention〕

As explained above, the present invention includes a switch circuit that generates control signals for storing images in a camera section, reading and transmitting still images from a camera input storage section, and a switch circuit that superimposes these control signals on image signals. and a mixing circuit connected to the main body of the still image videophone via a cable, and discriminates the superimposed signal from the mixing circuit and sends the image signal to the camera input storage section and the control signal to the common control section. By having the discrimination circuit, there is an effect that image capture and image transmission can be controlled more easily than before by operating the switch circuit in the camera section at hand.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a conventional still picture video telephone. 2... Memory for camera input, 3... Display section, 4...
・Switching circuit, 5... switch, 6... common control section,
7... Switch, 8... Transmission control unit, 9... Image memory, 10... Camera unit, 11... Camera body,
12...Mixing circuit, 13.14...Switch, 15
. . . Discrimination circuit, 20 . . . Still image videophone main body.

Claims (1)

[Claims] A camera unit including a camera body; a main body unit including a camera input storage unit that stores still image data of an image signal captured by the camera body; and a common control unit that controls the entire camera unit; a switch circuit that generates a control signal for commanding the camera body to capture an image and transmitting still image data from the camera input storage unit to a communication line;
a mixing circuit that sends a superimposed signal obtained by superimposing the control signal on the image signal from the camera body to the main body section via a cable, and the main body section converts the superimposed signal from the mixing circuit into the image signal. 1. A still image video telephone set, further comprising a discrimination circuit that discriminates and sends a control signal to the camera input storage section and a control signal to the common control section.