JPH0662270A - Multiscreen display synchronizing controller - Google Patents

Abstract

PURPOSE:To control the synchronization of multiple screens by synthesizing a synchronizing mark to transferred picture data and performing synchronizing control by transferring the picture data to any correspondent display device based on the detected result of this synchronizing mark. CONSTITUTION:A picture data transferred from a host device 30 are sent to a synchronizing mark addition and synthesization processing part, and picture data are synthesized so as to display the mark on a display screen. The picture data added the synchronizing mark are respectively passed through a picture '1' display device 21, picture '2' display device 22... picture 'n' display device 2n and displayed on a first screen 31, second screen 32... n-th screen 3n. Synchronizing mark readers 41-4n detect the presence/absence of the synchronizing marks on the screens, a mark detection part to inform the result of the mark detection part monitors the presence/absence of the marks from all the readers 41-4n and when all the readers report the presence of the marks, the start of a picture data transfer request is informed of a host device transfer control part. The host device transfer control part requests the transfer of picture data to be next displayed to the host device 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-screen display synchronization control device used for a device for displaying a plurality of screens while synchronizing them.

[0002]

2. Description of the Related Art In a conventional multi-screen display device, image data is recorded by National Television System Committee (NTSC).
In the case of analog signals such as, the multi-frame synchronization is obtained by using the frame period or the like. Further, when the image data is composed of digital signals, it is often compressed because the data amount is large.

[0003]

However, in the above-mentioned conventional multi-screen display device, when the data amount is compressed, the decompression processing time must be taken into consideration, and it is very necessary to perform the synchronous control. There is a problem that complicated processing is required and an expensive synchronous control device must be used in both cases of analog signals and digital signals.

In view of the above-mentioned problems in the conventional multi-screen display device, the present invention can be applied to either an image signal composed of an analog signal or a digital signal, which is simple and can be reduced in cost. Provided is a multi-screen display synchronization control device capable of controlling synchronization.

[0005]

SUMMARY OF THE INVENTION The present invention is a synthesis processing means for synthesizing a synchronization mark with screen data transferred from a predetermined device, and a detection means for detecting a synchronization mark synthesized with screen data. And a transfer control unit that transfers screen data to a plurality of corresponding screen display devices based on the detection result of the detection unit and controls the synchronization of the screen data.

[0006]

In the multi-screen display synchronization control device of the present invention, the synthesizing means synthesizes the synchronization mark with the screen data transferred from the predetermined device, and the detecting means produces the synchronization mark synthesized on the screen data. Based on the detection result of the detection means, the transfer control means transfers the screen data to the corresponding plurality of screen display devices for synchronous control.

[0007]

Embodiments of the multi-screen display synchronization control device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of a multi-screen display synchronization control device of the present invention.

The multi-screen display synchronization control device shown in FIG. 1 includes a mark detecting section 11 as a detecting means, a screen data main apparatus transfer control section 12 connected to the mark detecting section 11, and a screen data. Synchronous mark imparting synthesizer 13 which is a synthesizer connected to the main device transfer controller 12, and synthetic screen data display device which is a transfer controller connected to the synchronous mark imparting synthesizer 13. It is configured by the transfer control unit 14.

The multi-screen display synchronization control device of FIG. 1 can be used for a moving image stereoscopic display for displaying image data for left and right eyes in synchronization with each other, or a large-screen device composed of multiple screens.

FIG. 2 shows a configuration example of multi-screen display synchronization control using the multi-screen display synchronization control device of FIG.

The operation of the multi-screen display synchronization control device of FIGS. 1 and 2, particularly the multi-screen display synchronization processing procedure will be described below with reference to the flowchart of FIG.

The main device transfer control section 12 of the multi-screen display synchronization control device 10 makes a transfer request of screen data (image signal) to the main device 30 which is a predetermined device (step S1).

It is determined whether or not there is the next screen data (step S2). If YES in the above step S2, that is, if there is the next screen data, the process proceeds to step S3, which will be described later, and the above step S2. If NO, that is, if there is no next screen data, the operation ends. If YES in step S2, the transferred screen data is sent to the synchronization mark addition / combination processing unit 13, and the screen data in which a mark is displayed on a part of the display screen is combined (step S3). ). A color or shape may be used for the mark, and a mark suitable for the characteristics of the synchronization mark reading devices 41 to 4n is selected. In the present embodiment, if a non-display rectangular area is used as a mark in the corner of the screen, the sync mark reading devices 41 to 4n can determine the presence or absence of the mark simply by the presence or absence of the luminous intensity.

The screen data (step S4) to which the synchronization mark is added is respectively transferred by the display device transfer control section 14.
Screen 1 display device 21, screen 2 display device 22 ,. ． ． , Screen n
The first screen 31, the second screen 32 ,. ． ． ，
It is displayed on the nth screen 3n (step S5).

The synchronous mark reading devices 41 to 4n detect the presence or absence of a mark on the screen and notify the mark detecting unit 11 of the presence or absence of the mark (step S4).

The mark detection unit 11 monitors the mark presence / absence notifications from all the synchronization mark reading devices 41 to 4n and waits for the marks to be displayed on all screens (step S5).

When all the mark presence / absence notifications from the synchronous mark reading devices 41 to 4n are present, the mark detection unit 11 notifies the main device transfer control unit 12 of the start of the screen data transfer request (step S6).

It is determined whether or not each screen synchronization mark is present (step S7). If YES in step S7, the main device transfer control section 12 causes the main device 30 to display the screen data to be displayed next. When a transfer request for (image signal) is made, the process proceeds to step S2. If NO in step S7, the process proceeds to step S6.

[0019]

According to the multi-screen display synchronization control device of the present invention, a combination processing means for combining a synchronization mark with the screen data transferred from a predetermined device and a synchronization marker combined with the screen data.
Since it is provided with a detection means for detecting a noise and a transfer control means for transferring the screen data to a plurality of corresponding screen display devices based on the detection result of the detection means and synchronously controlling the same, it is constituted by an analog signal or a digital signal. It can be applied to any of the image signals, and can control the synchronization of multiple screens, which is simple and can be reduced in price. Further, when the image signal is a compressed digital signal, the synchronization control can be performed regardless of the decompression / restoring time which differs for each image data.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a multi-screen display synchronization control device of the present invention.

FIG. 2 is a block diagram showing a configuration example of multi-screen display synchronization control using the multi-screen display synchronization control device of FIG.

3 is a flowchart for explaining the operation of the multi-screen display synchronization control device in FIG.

[Explanation of symbols]

 11 Mark detection unit 12 Screen data main device transfer control unit 13 Synchronous mark addition combining processing unit 14 Combined screen data display device transfer control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 7/08 Z 9187-5C

Claims (1)

[Claims] 1. A synthesizing processing means for synthesizing a sync mark with screen data transferred from a predetermined device, a detecting means for detecting the sync mark combined with the screen data, and a detecting means of the detecting means. A multi-screen display synchronization control device, comprising: a transfer control unit that transfers the screen data to a plurality of corresponding screen display devices based on a detection result and controls the synchronization.