JPH0222752A - Video interface device - Google Patents

Abstract

PURPOSE:To prevent breakdown of parameters due to operator's careless correction input by providing a password check means which discriminates whether execution can be transferred to a parameter editing means or not. CONSTITUTION:A password check means 25 is provided which is connected to a keyboard 8 for information communication with the operator, a display device 9, and an MPU 1. The check means 25 collates passwords preliminarily registered in a data memory 7 with the password inputted by the operator. When both of passwords coincide with each other, execution is transferred to a parameter editing means 26 and parameter correction input is possible. Meanwhile, when passwords do not coincide with each other, the input is regarded as a wrong access request and execution is transferred to a video signal taking-in processing part 3. Consequently, the operator who does not recognize preliminarily registered passwords cannot start the means 26.

Description

[Detailed Description of the Invention] [Industrial Application] This invention relates to preventing destruction of video signal acquisition control parameters due to unnecessary modification input by an operator in a video interface device that stores video image signals in a RAM within the device. be.

[Conventional technology]

FIG. 3 is a block diagram of a conventional video interface device for storing video image signals. In the figure, (21 is a microprocessor (MPU) that controls the entire device, (21 is an R
OM, (3) is a capture processing unit that captures the video image signal input to the video signal input terminal (5) and stores it in RAM (4); (6) is under the control of MPU (1);
The capture processing unit (
This is an import processing control unit that performs control of step 3).

A non-volatile memory is used as the data memory (7) to prevent parameters from disappearing due to power outage or the like.

(8) is a keyboard for input, and (9) is a display device.

The operation of the video interface device configured as described above will be explained based on the flowchart shown in FIG. When the power of this device is turned on and the power-on reset is released, the MPU (1) sequentially executes the programs stored in the ROM (21).First, initialization processing (c) is executed to initialize each part. After performing this, the program proceeds to parameter edit check υ to determine whether there is a parameter edit request.

This request is determined by pressing a predetermined key on the keyboard (8) after the power is turned on. If there is an edit request, execution moves to the parameter edit processing section, which modifies the parameters retrieved from the data memory (7) and displayed on the display (8) from the keyboard (8), and stores them in the data memory (7). Store again. On the other hand, if there is no input request, or if the parameter editing process is completed, the execution moves to the video signal capture process, and the capture process control unit (6) follows the parameters stored in the data memory (7).
), the video image signal input from the video signal input terminal (5) is captured by the capture processing section (3).
AM (Stored to 41.

[Problem to be solved by the invention]

Since the conventional video interface device is configured as described above, it is easy to move to a step where parameters can be edited due to an operator's unconscious key press or erroneous key operation after the wl power is turned on. Originally, for this type of equipment, the equipment installer and the equipment user (general operator) are different people, and the installer sets the parameters when installing and adjusting the equipment, and inputs and stores them in the data memory (7). . However, when an operator moves to a step where parameters can be edited during operation, the operator does not understand the importance of the parameters and inputs unnecessary corrections, resulting in the parameters being destroyed.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a video interface device whose parameters are not destroyed due to unnecessary correction input by an operator.

[Means to solve the problem]

In the video interface device f& according to the present invention, an installer registers a password at the same time as setting parameters when installing and adjusting the device, and thereafter, the password is checked in advance for parameter editing processing, and the parameter A password checking means is provided to determine whether or not the transition to the editing means is possible.

[Effect]

In the video interface device of the present invention, the password checking means verifies the password registered in advance and the password input by the operator, and if the passwords do not match, the process does not proceed to the parameter editing means.

〔Example〕

FIG. 1 is a diagram showing the main configuration of an embodiment of a video interface device according to the present invention.

As is clear from FIG. 1, this embodiment includes a keyboard (8) and a display (9) for exchanging information with the operator.
A password check means (E) is provided which passes through the MPU (1), and this password check means (E) compares the password registered in advance in the data memory (7) with the password input by the operator. Based on the result, it is determined whether or not the parameter editing means (to) can be executed. The configuration block diagram of this embodiment is the same as that of the conventional example shown in FIG. 3, so a description thereof will be omitted.

Next, the operation of the above embodiment will be explained according to the flowchart of FIG. First, the power-on reset after the power is turned on is canceled, the MPU (1) executes the initialization process QD, and proceeds to the parameter edit check @. The determination of the presence or absence of a parameter edit request here is the same as that described in the prior art example, and if there is a request, execution moves to password acceptance check process 31) to accept key-in of a password from the operator. Then, the keyed-in password is compared with the password registered in advance in the data memory (7) in a password match determination (2).

If both passwords match, execution moves to the parameter edit process (to), and it becomes possible to input corrections to the parameters. On the other hand, if the passwords do not match, this is treated as an unauthorized access request and execution moves to video signal capture processing @. Therefore, it is impossible for a user (ordinary operator) who does not recognize the pre-registered password to proceed to the parameter editing process stage.

〔Effect of the invention〕

As described above, according to the present invention, by providing a password checking means for determining whether or not to proceed to the parameter editing means, it is possible to prevent parameter editing processing due to an operator's unconscious key press or erroneous key operation. It is possible to eliminate transitions to steps and to create a video interface device in which parameters are not destroyed by unnecessary modification inputs.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the main configuration of an embodiment of the present invention, and FIG.
The figures are a flowchart of the operating program in Figure 1, Figure 3 is a block diagram of the configuration of the video interface device, and Figure 4 is a block diagram of the configuration of the video interface device.
The figure is a flowchart of a conventional operating program. In the figure, (1) is a microprocessor (MPU)
, (3) is the import processing unit, (7) is the data memory, (
8) is a keyboard, (9) is a display, @ is a password checking means, and (to) is a parameter editing means. In addition. show. The same reference numerals in each figure indicate the same or corresponding parts.Figure 2Figure 1Figure 3Figure 4

Claims (1)

[Claims] A data memory that stores passwords and parameters necessary for video signal capture control, a capture processing unit that captures the video signal according to the parameters, a keyboard and display that exchanges information with the operator, and a parameter edit that allows modification of the parameters. means,
A video interface device characterized by comprising password checking means for determining whether or not the transition to the parameter editing means is possible based on the password.