JPH04139492A - Multi image display device - Google Patents

Abstract

PURPOSE:To enable accurate synchronous operation by interrupting the execution of a slave device when a queue signal is inputted from the master-side synchronism control part of a master device according to the execution of the output instruction of the queue signal and entering an input wait state for the queue signal, and restarting the execution in synchronism with the input of the queue signal at the same time. CONSTITUTION:The device is provided with a means 4 which inserts an input wait instruction for the queue signal into video development data executed by respective slave device 2b - 2n and interrupts the execution of the video development data once the input wait instruction is executed and a slave-side synchronism control part 5 which is connected to the master-side synchronism control part and commands the release of the interruption in response to the input of the queue signal. Therefore, when the queue signal is outputted from the master-side synchronism control part of the master device 2a according to the execution of the output instruction for the queue signal, the respective slave devices 2b - 2n interrupt their execution to enter the input wait state for the queue signal without fail and the master device 2a and slave devices 2b - 2n are synchronized by the output instruction of the master device 2a. Consequently, accurate synchronous operation becomes possible.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention executes video development data to supply a video signal for enlarged display to a multi-monitor device formed by arranging a plurality of video monitors in a matrix. Equipped with multiple magnifying devices,
The present invention relates to a large-scale multi-screen display device in which each enlarging device is operated synchronously.

[Conventional technology]

Conventionally, a multi-screen display device, also called a multi-vision system, processes video signals such as demonstration images of various events from a video source device such as an LDP or a VTR by enlarging processing using the frame memory of an enlarging device (video enlarging device). , to form a video signal for enlarged display that is magnified by 1 to N times in the horizontal and vertical directions and supplied to a multi-monitor device.

Then, the video signal for enlarged display is displayed on a screen by a plurality of video monitors arranged in a matrix of the multi-monitor device, the video signal of the video source device is enlarged and displayed, and the demonstration image etc. is displayed on a large screen.

By the way, the enlargement process is performed at an enlargement rate of 2 for each screen of enlarged display.
This is done by executing video development data for display control consisting of display positions, etc., and this development data is created by programming using a personal computer device (hereinafter referred to as a PC device) or the like.

Then, the formed video development data is uploaded under online control.
In the case of a configuration in which the data is transferred from the C device etc. to the enlargement device and executed,
Due to constraints such as data transmission speed between devices, a time lag tends to occur between the enlargement process and the playback of the video source device.

Moreover, the PC device and the like must be kept on hand.

On the other hand, when displaying demonstration images of various events, the same video development data is usually repeatedly executed to enlarge and display images with the same content, and the video development data is rarely changed.

Therefore, for example, the document ``Sanyo Technical Lehi, (SA
NYOTECHNICA REVIEW), VOL,
22. No. 2 (published June 1990)”
"Multi-vision system" has a magnifying device with RAM, for example.
An execution control memory (execution program memory) for the configuration is provided, and video development data formed by the PC device is transferred to the execution control memory in advance under offline control, and after this transfer, the data in the execution control memory is executed to automatically operate the enlargement device. It is described that the above-mentioned disadvantages can be solved by operating the vehicle.

Furthermore, this kind of multi-screen display apparatus includes a large-scale type that includes a plurality of the enlargement apparatuses and multi-monitor apparatuses, and displays images simultaneously on each of the multi-monitor apparatuses by operating each enlargement apparatus synchronously.

Synchronous operation of a large-scale multi-screen display device can be carried out by either one of the enlargement devices, as described in the specification and drawings of Japanese Patent Application No. 1-127330 (HO4N 5/14). One of the enlarging devices is set as the master device, and the remaining enlarging devices are set as slave devices, and if necessary, the master device simultaneously sends start/stop control signals to each raping device via a common control signal line, and controls the device. The execution of each slave device is interrupted and restarted by an interrupt trigger based on reception of a signal.

[Problem to be solved by the invention]

In the case of the conventional large-scale multi-screen display device, the master device unilaterally sends start/stop control signals to each slave device to establish synchronization, so when the interrupt trigger occurs, the operation ( (Execution) Depending on the state, the timing at which execution is interrupted or resumed upon receiving a trigger is delayed from the timing at which the trigger occurs.

This delay causes a deviation in the operation of each enlarging device, causing a problem that accurate synchronized operation cannot be performed.

Then, when the enlarged display is repeated, the above-mentioned deviation increases due to the establishment of synchronization each time, and synchronous operation cannot be performed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a large-scale multi-screen display device that can perform accurate synchronous operation.

[Means to solve the problem]

In order to achieve the above object, in the multi-screen display device of the present invention, an output command for a cue signal for establishing synchronization is inserted into the video development data executed by the master device, and the video development data executed by each slave device is inserted into the video development data executed by the master device. an instruction to wait for the input of the queue signal is inserted into the master device, a master-side synchronization control unit that generates the queue signal by executing the output instruction, and a master-side synchronization control section that generates the queue signal by executing the output instruction; A means for interrupting the execution of the video development data, and a slave-side synchronization control section connected to the master-side synchronization control section and instructing cancellation of the interruption by manual input of the cue signal are provided.

[Effect]

In the case of the multi-screen display device of the present invention configured as described above, when the cue signal is output from the master side synchronization control section of the master device based on the execution of the cue signal output command,
Each slave device always suspends execution and waits for input of a queue signal based on the execution of an instruction that is waiting for input.

Then, upon input of the cue signal, the slave-side synchronization control section of each slave device immediately issues a command to cancel the interruption, and based on this command, each slave device simultaneously resumes execution in synchronization with the input of the cue signal.

Therefore, the output command from the master device establishes synchronization between the master device and each slave device, and accurate synchronized operation is performed.

〔Example〕

One embodiment will be described with reference to FIGS. 1 and 2.

In FIG. 1, (1) is a video source device consisting of one or more video source devices such as LDP, VTR, etc.; (2a)
, (2b), ---, (2n) are a plurality of enlarging devices, each of which includes an execution control memory (3) that holds video development data and an execution control unit (4) configured with a microcomputer.
) has a synchronization control section (5).

(6a), (6b), ---, (6n) and (
7a), (7b), -, (7n) are enlargement devices (
A video switching device and a multi-monitor device are provided for each monitor device N (7a) to (7n).
) is formed by arranging a plurality of video monitors (8) in a matrix.

(9) is a system controller that creates video development data and controls the source device (1), and is composed of a PC device and the like. aω is a distributor that selectively supplies data from the system controller (9) to each enlargement device (2a) to (2n).

In this embodiment, the enlarging device (2a) is set as the master device, and each of the remaining enlarging devices (2b) to (2) is set as the master device.
n) is set in the slave device.

Based on this setting, the synchronization control section (5) of the enlarging device (2a)
) forms the master side synchronization control section, and the enlarging device (2b) ~
Each synchronization control section (5) of (2n) forms a slave side synchronization control section.

The synchronization control unit (5) of the enlarging device (2a) connects each enlarging device (2b) to (2n) via the synchronizing signal line (11).
Synchronous side? 311 section (5).

On the other hand, even if the video development data formed by programming the system controller (9) is the same, the data of the master device and the data of the slave device are different.

In other words, the video development data executed by the master device is processed by the "cue signal output" command for outputting a cue signal for synchronization establishment at each point where synchronization is re-established, as shown in FIG. 2 (ta), for example.
is inserted and formed.

In addition, the video development data executed by each slave device is formed by inserting a cue signal input wait command ``wait for cue signal'' immediately before the point where the synchronization is re-established, for example, as shown in FIG. 2 (bl). Ru.

Note that 1. in Figures 2(a) and (b). −． 10, 11,
12.13 is the program number (No,) to be executed in order
shows.

The formed video development data for the master device and video development data for the slave devices are transferred from the system controller +9) to the distributor 00) to the enlargement device (
Execution control memo for 2a) January 5), enlargement device (2b) - (
2n) are downloaded and written to each execution control memory (5).

Furthermore, when the download is completed, the system controller (9) sends information to each enlarger (
A start command is given to the execution control units (4) of 2a) to (2n) at the same time.

With this startup command, the operation of each of the enlargement devices (2a) to (2n) is started simultaneously, and thereafter, the operation of each enlargement control section (4) is started simultaneously.
) is automatically activated by an internal timer to perform automatic operation.

The system controller (9) also controls the source device (
The device selection and playback control in 1) is performed, and the video signal of the selected video source device is transmitted to each enlargement device t(2a) to (2n).
) and each video switching device (6a) to (6n).

In each enlarging device (2a) to (2n), each execution control unit (4) reads and executes the video development data from the memory (3), and based on this execution result, the frame memory configuration (not shown) is It controls the enlargement processing section of and also switches the signals of each video switching device (6a) to (6n).

At this time, based on the control of the enlargement processing section, the video signal supplied from the source device (11) to each enlargement device (2a) to (2n) is enlarged, a video signal for enlarged display is formed, and each image is It is supplied to the switching devices (6a) to (6n).

For enlarged display, the video switching devices (6a) to (6n)
) is switched from the output of the video signal of the source device (1) to the output of the video signal for enlarged display of each enlargement device (2a) to (2n), and the video signal for each enlarged display is outputted to each monitor device (7).
a) to (7n), and each monitor device (7a) to (7n).
7n), a demonstration image, etc. is displayed in an enlarged manner.

By the way, in order to insert, for example, an explanation (narration) by a staff member in the middle of a demonstration, etc., in this embodiment, when the video development data is executed up to No. 11, "No. 11" in FIG. 2(a) is inserted. The execution control unit (4) of the enlarging device (2a) interrupts execution due to "wait for trigger".

In addition, the execution is interrupted in the same state as the enlarging device (2a), and synchronization is established and execution is resumed at the same time when the above-mentioned explanation ends and execution is resumed. ,1
Based on the execution of "wait for queue signal" in step 1, each enlargement device (
Execution control B (4) of 2b) to (2n) also interrupts execution at the NO, 11 position.

Then, each enlarging device (2a) to (2n) enters a state of waiting for input of a cue signal, and each monitor device (7a)
~(7n), the screen immediately before the interruption continues to be displayed.

Next, after the above explanation is completed, a restart trigger is activated by the execution control unit (
4), this control unit (4) resumes execution.

At this time, "NO, 12, 1 signal output" in FIG. 2(a) is executed first, and each enlargement Device (2
Cue signals are simultaneously supplied to the synchronization control units (5) of b) to (2n).

Based on this supply, in each enlarging device (2b) to (2n), the synchronization control unit (5) immediately receives the cue signal and sends the cue signal from the synchronization control unit (5) to the execution control unit (4) for the restart. A command to cancel the suspension corresponding to a trigger is given, and the execution control unit (4) resumes execution.

Then, in synchronization with the input of the cue signal, each enlarging device (2b
) to (2n) simultaneously resume execution, and N in Figure 2 tb)
o. Perform 12 "Expanded memory settings" first.

At this time, the enlargement device (2a) also executes the "enlargement memory setting" No. 13 in FIG. Synchronization is performed by executing instructions.

Through this synchronization, each enlarging device (2a) to (2n)
will resume operation in a completely synchronized state, resulting in accurate synchronized operation.

Then, at each point where the synchronization is re-established, see Figure 2 (NO in al.

12 "Cue signal output", NO in FIG. 1b), and 11 "Cue signal wait" are inserted, and the same synchronization as described above is performed.

By the way, in the above embodiment, each enlarging device (2a)
- (2n) are provided with an execution control memory (3), and after startup, each enlargement device (2a) - (2n) performs processing automatically without being controlled by the system controller (9). There is no time lag between the video signal output from N(1) and the processing of each of the enlargers (2a) to (2n).

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

When a cue signal is output from the master-side synchronization control unit of the master device based on the execution of a cue signal output command, each slave device must interrupt execution and input the cue signal based on the execution of the instruction waiting for input. Since it is in a waiting state, the slave side synchronization control unit of each slave device immediately issues a command to cancel the suspension, and based on this command, each slave device synchronizes with the input of the queue signal and resumes execution at the same time. According to the output command of the master device, synchronization between the master device and each slave device is completely established, and accurate synchronized operation can be performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the multi-screen display device of the present invention, and FIGS. 2(a) and 2(fb) are explanatory diagrams of video development data of the master device and each slave device of FIG. 1. 11i-m-video source device, (2a)-enlargement device set to master device, (2bL (2n)-enlargement device set to slave device, [5)-synchronization control unit, (7
a) , (7b) (7n) --Multi-monitor device, (
8L-Video monitor. Agent Patent Attorney 1) Ryu Abe Diagram (a) Diagram

Claims (1)

[Scope of Claims] 1. Setting any one of a plurality of enlargement devices to which a video signal of a video source device is supplied as a master device, and setting each of the remaining enlargement devices as slave devices, by the master device. Controlling the operation of each of the slave devices to synchronize each of the enlarging devices, causing each of the enlarging devices to execute video development data for display control, and enlarging the video signal of the source device for enlarged display. a video signal, and supplies the video signal to each video monitor arranged in a matrix of each of the multi-monitor devices for each of the enlargement devices, and enlarges and displays the video signal of the source device on each of the multi-monitor devices. In the screen display device, an instruction to output a cue signal for establishing synchronization is inserted into the video development data executed by the master device, and an instruction to wait for input of the cue signal is inserted into the video development data executed by each of the slave devices. , the master device is provided with a master side synchronization control unit that generates the queue signal by executing the output command, and each of the slave devices is provided with means for interrupting execution of the video development data by executing the input wait command; A multi-screen display device comprising: a slave-side synchronization control section connected to the master-side synchronization control section and commanding cancellation of the interruption upon input of the cue signal.