JPH0511659U - Video screen display - Google Patents

Abstract

(57) [Summary] [Construction] A black burst generator 5 for generating a synchronization signal d for synchronizing a plurality of input video signals, a plurality of video detectors 2 for detecting a plurality of video signals a, and a plurality of video detectors 2. Of the video signal a from the black burst generator 5 and the video signal b from the video detector 2 in synchronization with the sync signal d of the black burst from the black burst generator 5 to be converted into the divided composite video signal g and output. , And a control unit 3 for instructing the video synthesizing unit 4 to specify the synthesizing number. [Effect] A plurality of video signals can be simultaneously displayed on one TV monitor.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a video screen display device for displaying an input video signal on a screen in a video conference system.

[0002]

[Prior Art]

 When there are multiple video signals to be used, the video screen display device in the conventional video conference system has to display the video signals on the number of video monitors corresponding to the video signals or by manually switching the video selector. It was

[0003]

[Problems to be solved by the device]

 The conventional video screen display device described above requires a monitor corresponding to the number of video signals used. In addition, in order to display on a single TV monitor, it was complicated to manually switch using a video signal switch.

[0004]

[Means for Solving the Problems]

 The video screen display device of the present invention, in a video conference system for synthesizing a plurality of synchronized video signals and displaying them simultaneously on a single video monitor, provides a synchronization signal for synchronizing the plurality of input video signals. A black burst generating section for generating, a plurality of video detecting sections for detecting the plurality of video signals, and a divided composite video signal for synchronizing the plurality of video signals with the synchronizing signal of the black burst from the black burst generating section And a control unit for instructing the video synthesizing unit in accordance with the signal from the video detecting unit, to divide and synthesize the video signal corresponding to the number of video signals of the video signal. The video signal is automatically divided and synthesized.

[0005]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention, and FIGS. 2, 3, 4, and 5 are diagrams showing a video screen on which a video signal of this embodiment is displayed.

In FIG. 1, the video signal a synchronized with the black burst signal d output from the external synchronization output terminal 8 is input to the video detection unit 2 via the video input terminal 1. When the video detector 2 detects the presence or absence of the video signal a, it outputs the video detection signal b to the controller 3.

The control unit 3, which receives the video detection signal b, determines the number of the input video signal a and the video input terminal 1 to which the video signal a is input according to the video detection signal b. Further, it is possible to determine the division / combination number based on the number of input video detection signals b. Further, the control unit 3 outputs the number of input video signals a, the number of divided composites, and the control signal c indicating the video input terminal 1 corresponding to the input video signals a to the video composite unit 4 and the superintegrator. Output to the pause control unit 6.

When the control signal c is input, the superimpose control unit 6 sends to the video synthesizing unit 4 the caption character data assigned to the video input terminal 1 and the imposition control signal e indicating the screen position for inserting the caption character. Output. Since the video signal a, the control signal c, and the impose control signal e are input to the video synthesizing unit 4 via the video detecting unit 2, the caption characters shown in FIG. 2, FIG. 3, FIG. 4, and FIG. The divided combined video signal g superimposed is output to the video output terminal 9 in correspondence with the number of input video signals a.

Since the black burst synchronizing signal d from the black burst generating unit 5 is input to the video synthesizing unit 4, a split synthesizing video signal g synchronized with the synchronizing signal d is obtained.

Further, the headline character can be changed by an external control signal f from an external control terminal 7 which controls the superimpose control unit 6 from the outside. Although the case where the number of video input terminals is four has been described here, the number of video inputs can be increased without being limited to this.

[0011]

[Effect of the device]

 As described above, according to the present invention, by detecting a plurality of input video signals and automatically outputting the divided and synthesized video signals, manual switching work is not required, and one TV monitor can display a plurality of video signals. The effect is that the video signals can be displayed simultaneously.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a monitor screen when there is one video signal according to the present embodiment.

FIG. 3 is a diagram showing a monitor screen when there are two video signals in the present embodiment.

FIG. 4 is a diagram showing a monitor screen when there are three video signals in the present embodiment.

FIG. 5 is a diagram showing a monitor screen when there are four video signals in the present embodiment.

[Explanation of symbols]

 1 Video input terminal 2 Video detection section 3 Control section 4 Video composition section 5 Black burst generation section 6 Superimpose control section 7 External control terminal 8 External synchronization output terminal 9 Video output terminal

Claims (1)

Claims for utility model registration 1. In a video conferencing system for synthesizing a plurality of synchronized video signals and displaying them on a single video monitor at the same time, for synchronizing the plurality of input video signals. A black burst generator for generating a synchronization signal, and a plurality of video detectors for detecting the plurality of video signals,
A video synthesizing unit that synchronizes the plurality of video signals with the synchronization signal of the black burst from the black burst generating unit and converts the divided video signals into a divided synthetic video signal and outputs the divided synthetic video signal, and the video synthesizing unit according to the signals from the video detecting unit. A video screen display device, comprising: a control unit for instructing the number of composites, and the divided composite video signals are automatically divided and composited according to the number of video signals of the video signals.