JPH09224199A - Image display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display an image, in which a computer signal and an NTSC signal are mixed, on one display by converting a data signal from a computer to the NTSC signal, synthesizing it with the NTSC signal from a television system and converting the synthetic signal into a data signal for computer. SOLUTION: The computer signals from computer display devices 1a and 1b are distributed to a signal converter 3 and a switcher 4 by an adaptable distributor 2. In order to perform processing such as picture mixture or switching with the other NTSC signal, the signal converter 3 converts the computer signals from the computer display devices 1a and 1b to the NTSC signals. After this conversion, respective processes such as the addition of characters or the synthesization of four pictures are made possible as NTSC signals. After such respective processes are performed, in order to finally match the signals with the input signals of a picture display 10, the NTSC signals are converted into computer data signals by a signal converter 9 and display contents are decided by the switcher 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to image display in a system using an image data signal from a computer and an NTSC signal from a television device.

[0002]

2. Description of the Related Art Conventionally, in a system in which a device using a computer signal and a device using an NTSC signal coexist, separate display devices have been installed for screen display.

[0003]

As described above, since the image data signal from the computer and the image of the television apparatus NTSC signal have different signal forms, there is a drawback that mixed image display cannot be performed. Moreover, since the signal forms are different, separate display devices are required.

According to the present invention, these drawbacks are eliminated and an image display in which a computer signal and an NTSC signal are mixed is performed by one display.

[0005]

According to the present invention, a data signal from a computer is converted into an NTSC signal, which is combined with an NTSC signal from a television device, and the combined NTSC signal is converted into a computer data signal. It is a thing.

According to the present invention, at present, even if the signal that can be input to the image mixing device is only the NTSC signal, by converting the computer data signal into the NTSC signal to make the signal form the same, the screen mixing device The signal can be input to.

Also, the computer data signal is sent to NTSC.
When converted into a signal, the character signal from the character generator can be superimposed on the image as necessary to display a character.

The signal processed by the screen mixer is then converted into a computer signal again and displayed on the screen display.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. 1a and 1b are computer display devices, the signals from which are connected to a distributor of 2, then to a signal converter of 3 and a switch of 4. In addition,
The signal converter 3 is a well-known computer data signal-NTS.
It is a C signal converter. The signal output from the signal converter 3 is connected to the signal converter 9 through the character generator 6 and the switcher 7 and the screen mixer 8 together with the NTSC signals of the NTSC television devices 5a and 5b. It Character generator 6
Has a well-known character generator, and the synthesis period 12 synthesizes characters with the input NTSC signal. Switch 7
Selects one of the computer display devices 1a and 1b and the television devices 5a and 5b, or the screen mixer 8 to select a screen in which these four screens are combined into one. Finally, it is connected to 10 screen displays via 4 switches. Each of these devices is controlled by 11 controllers.

Next, this operation will be described. The computer signals from the computer display devices 1a and 1b are distributed to the signal converter 3 and the switching device 4 by the distributor 2 which can handle them. Signal converter 3 is another NTSC
The computer data signals from the computer display devices 1a and 1b are converted into NTSC signals in order to perform processing such as signal mixing and screen switching and switching. After conversion, this signal can be processed as an NTSC signal. Each processing is addition of characters in the character generator 6 and the combiner 12, and combination of four screens in the screen mixer 8. After performing each process,
Since the signal finally matches the input signal of the screen display 10, the signal converter 9 converts the NTSC signal into a computer data signal, and the switch 4 determines the display content. That is, the computer display device 1a or 1
b, or any one of the signals that have passed through the signal converter 9 and have undergone the processing as described above is selected.

[0011]

As described above, according to the present invention, it is possible to first perform a mixed display of a computer data signal and an NTSC signal, which has been difficult in the past. Further, although each requires a dedicated display device, one display device can be used.

[Brief description of drawings]

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

[Explanation of symbols]

1 computer display device, 2 distributors, 3
Signal converter, 4 switching device, 5 NTSC television device, 6 character generator, 7 switching device, 8 screen mixing device, 9
Signal converter, 10 screen display, 11 controller.

Claims (1)

[Claims] 1. A signal converter for converting a computer image data signal into an NTSC image signal in a system comprising a computer display device as a display screen generation source and an NTSC television image device, and from the signal converter. A computer data signal converted into the NTSC signal and a character generator and synthesizer for superimposing each image and character signal from the NTSC television image device, and a screen mixture for synthesizing each NTSC signal from each synthesizer And a switch for selecting any one of the output of the screen mixer or the output from each of the combiners, and a signal converter for converting the NTSC signal of the next stage into a computer data signal. Characteristic image display device.