JPH04132386A - Video telephone system - Google Patents

Abstract

PURPOSE:To display a pointer at the entire area on a screen without being masked by a video signal by displaying the pointer after switching the video signal stored in each memory into the form data of the pointer. CONSTITUTION:The video signal being a data for a television conference is outputted as an analog RGB signal 15 from a personal computer(PC) main body 1. The position data from the PC main body 1 are communicated through an interface part 4 to a CPU 4, at this system. And also, the position data of the other side system are communicated through an ISDN communicating part 13 to the CPU 14. The CPU which receives these information communicates the position data of the pointer to a display controlling part 5. Then, the data indicating the form of each pointer are written in a pointer pattern memory 6. Thus, the screen can be displayed at a CRT 2, and the pointer can be indicated at the entire screen area.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a videophone device, and more particularly to a videophone device that combines and displays a CRT display signal output from a personal computer and a television video signal.

[Conventional technology]

A conventional videophone device stores a video signal to be transmitted and a video signal to be received in a memory, and is connected to a personal computer (
Position data of a pointer displayed on a CRT screen from an instruction input bag W (hereinafter referred to as a mouse) connected to a PC (hereinafter referred to as a PC) was stored on a video signal in a memory.

[Problem to be solved by the invention]

The above-described conventional videophone device has the disadvantage that the video signal and the pointer are combined and displayed on the CRT, so the pointer display is masked and the pointer instruction cannot be seen.

[Means to solve the problem]

The videophone device of the present invention includes means for storing a video signal to be transmitted to a partner device and a video signal received from the partner device in a first memory, and a second memory for storing shape data of a pointer to be displayed on the screen. a first switching means for selecting and outputting a signal from the first or second memory; and position data indicating the pointer position by an instruction input device connected to a personal computer. and a second switching means for switching between a screen display signal from the personal computer and a signal from the first switching means and outputting the same to a CRT according to the position data.

〔Example〕

Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention.

In this embodiment, a PC main body 1 includes a mouse 3 as an instruction input device for moving a pointer on a CRTI screen for display.
, an interface 4 into which pointer position data 16 is input from the PC main body l, control of the pointer display position and the display position of the television screen, and a pointer pattern memory 6
and a display control unit 5 that controls writing and reading of the television image memory 10, a pointer pattern memory 6 that stores pointer pattern data, and selecting either the output of the pointer pattern memory 6 or the output of the television image memory 10. A selector 7, a D/A converter 8 that converts the output of the selector 7 to D/A and outputs the result, and a PC main body 1.
A selector 9 selects between the analog RGB signal 15 output from the D/A converter 8 and the output of the D/A converter 8, a television image memory 10 stores the video signal, and converts the video signal input from the camera, video, etc. into an RGB signal. a video signal converter 11 that converts the signal and further converts it into a digital signal; a television camera;
A video signal output unit 12 that outputs an NTSC video signal such as video, and an I for connecting to an I SDN line.
It is configured to include an SDN communication section 13 and a CPU 14 that controls each of the above sections via a bus 17.

Next, the operation of this embodiment will be explained.

FIG. 2 shows a screen display of the CRTI of this embodiment, and the TV screen 18 is used as a material for the video conference, and this video signal is transmitted and received with the other party's device through the ISDN line and is also stored in the memory. The 0 image 19 displayed is displayed with the video signal output from the video signal output section 12,
This video signal is also transmitted and received with the other device via the ISDN line.

The pointer 20 that displays the screen position of the own device is on the PC main body 1.
It moves according to the device data 16 consisting of. This location data 16 is transmitted to the partner device via the ISDN line. Pointer 21 that displays the screen position of the other device
moves according to location data received via the ISDN line.

A video signal serving as material for a video conference is output from the PC main body 1 as an analog RGB signal 15.

In the own device, position data from the PC main body 1 is notified to the CPU 4 via the interface section 4. In addition, the position data of the other device is sent to the CPU 1 via the ISDN communication unit 13.
4 will be notified. Upon receiving these notifications, the CPU 14 notifies the display control unit 5 of the pointer position data. Further, data representing the shape of each pointer is written into the pointer pattern memory 6.

On the other hand, the television image memory 10 includes a video signal output section 12.
The video signal from the other party and the video signal received from the other party input via the ISDN communication unit 13 are written. Which of these video signals is displayed is determined by a command issued from the CPU 14 to the display control section 5.

In this way, the information stored in the pointer memory 6 and the television image memory 10 is synchronized with each scanning line of the analog RGB signal output from the PC main body 1, and the pointer of the own device, the pointer of the other device, and the video The display control unit 5 and the selector 7.9 switch the screen and the conference screen in that order, and a screen as shown in FIG. 2 is displayed on the CRT 2, and the pointer can be directed to the entire screen area.

〔Effect of the invention〕

As explained above, the present invention switches between the video signal and the pointer shape data stored in each memory.
By displaying on RT, there is an effect that the pointer can be displayed in the entire area on the screen without being masked by the video signal.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram for explaining this embodiment. 1... PC body, 2... CRT, 3... Mouse,
4... Interface section, 5... Display control section, 6.
...Pointer pattern RAM, 7...Selector, 8.
...D/A converter, 9...Selector, 10...TV image memory, 11...Video signal converter, 12...
・Video signal output section, 13...I SDN communication section, 14
...CPU.

Claims (1)

[Claims] 1. Means for storing a video signal to be transmitted to a partner device and a video signal received from the partner device in a first memory, and a second memory for storing shape data of a pointer to be displayed on a screen. and first switching means for selecting and outputting a signal from the first or second memory. 2. means for detecting position data indicating the pointer position by an instruction input device connected to a personal computer, and detecting a screen display signal from the personal computer and a screen display signal from the first switching means according to the position data; 2. The videophone apparatus according to claim 1, further comprising second switching means for switching between the signals and outputting the signals to the CRT.