JPH06217195A - Video equipment controller - Google Patents

Abstract

PURPOSE:To set an ID number on an individual common bus at each video equipment from a host computer, in a system in which the plural video equipments connected with the common bus line of the host computer are controlled by a command from the host computer. CONSTITUTION:Just after a power source is thrown in, all pieces of video equipment 2a-2f receives a video equipment control command from the high order video equipment or a host computer 1, and don't transmit the command to the low order video equipment. All pieces of the video equipment can be ID-set from the host computer 1, and the video equipment once ID setting is made is not ID-set again. In this state, the ID is set sequentially from the video equipment (#1) 2a by the host computer, and the command is transmitted to the low order pieces of video equipment 2b-2f, so that the ID setting of all pieces of the video equipment and the common bus with which all pieces of the video equipment are connected can be established.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a device for controlling a large number of video devices by connecting a common bus to a single host computer, and controlling video devices having individual IDs for video editing. It relates to the device.

[0002]

2. Description of the Related Art In recent years, computers have been built in various video equipment, and the video equipment has been controlled by a communication line of the host computer to perform editing work. The host computer discriminates and controls each video equipment. Required to do so. FIG. 4 shows a conventional general video equipment control device.
Shown in.

In FIG. 4, 6 is a host computer,
Video devices 7a to 7f are connected to the common bus of the host computer 6, and each have a built-in DIP switch for ID setting.

[0004]

However, as shown in FIG. 4, in the above-described conventional configuration, the commands on the common bus of the host computer 6 are used to determine whether or not each video device is intended for its own station. It was necessary to manually set the DIP switch and the like in each video device in advance.

Therefore, when the connection of the video equipment is changed or the number of connected video equipment is increased, the DIP switch setting must be manually performed every time, and the ID for each video equipment is troublesome and erroneous. There was also the problem that signals would collide with each other.

The present invention solves the above problem, and automatically sets the IDs of all video equipment connected to the common bus of the host computer from the host computer without manual labor before starting editing control. This aims to avoid troublesome operations and incorrect ID settings.

[0007]

In order to achieve the above object, a video equipment control device of the present invention is a video equipment control device for controlling a large number of video equipments by control from a common bus of a host computer. No ID setting hardware such as a DIP switch is provided on the video device side, and the ID is stored in the memory in the video device.
The ID is set by sequentially instructing the ID to each video device from the host computer.

[0008]

According to the present invention, in the case of controlling a large number of video devices, the present invention automatically sets the ID of each video device from the host computer, which is faster and more accurate than the case of using a DIP switch or the like. It is possible to set various IDs and build a large-scale and highly reliable video equipment control system.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a connection between a common bus line of a host computer of a video equipment control apparatus and a plurality of video equipments in one embodiment of the present invention.

In FIG. 1, 1 is a host computer,
Video devices 2a to 2f are defined as being higher in order as they are closer to the host computer 1. The internal circuit of each video equipment is shown in FIG. In FIG. 2, 3 is a microcomputer,
A command reception buffer 4 receives a command transmitted from the host computer 1 or a higher-level video device. Reference numeral 5 denotes a gate, the operation of which is controlled by the microcomputer 3, and sends the command received from the higher order to the lower order video equipment as it is.

FIG. 3 is a flowchart showing a flow in which the host computer 1 sets the IDs of all the video equipment. Immediately after the power is turned on, all the video equipment controls the gate 5 by the respective microcomputers 3 to receive the video equipment control command from the higher-order video equipment or the host computer 1, but the lower-order video equipment receives the command. I am not trying to tell you.

In this state, the host computer 1
When the (# 1) setting command is sent, the video equipment (# 1) 2
a receives it, sets its own ID as # 1, and sends a reply of completion of ID setting processing to the host computer 1. Next, from the host computer 1 to the video equipment (# 1) 2
When the link establishment command is issued to a, the video device (# 1) 2a thereafter controls the gate 5 by the internal microcomputer 3 to send the command of the host computer 1 to the lower video device (# 2) 2b. I will tell you. The video equipment (# 1) 2a once set with the ID is in a state where the ID is not registered again unless the power is turned on again or the ID release command is received.

Next, the ID (#
2) When the setting command is sent out, the video equipment (# 1) receives the command and transmits it to the subordinate video equipment (# 2) and also performs command analysis processing by itself, but the ID
Since the setting is completed, discard it.

The video equipment (# 2) executes the received ID setting command to set the ID as # 2. Similarly, the host computer 1 issues a link establishment command to set the IDs of all video equipment while incrementing the ID number by one.

Since the execution result does not come back when the ID number to which the video equipment is not connected at the end is reached, if the host computer 1 does not respond within a certain time, the number obtained by subtracting 1 from the ID number sent at the end is Judge as the ID of the lowest video device.

As a result, the DIP switch or the like is not required on the video equipment side, and the ID of each video equipment can be set by a command from the host computer, so that it is also effective for resetting the ID when the system is changed. Artificial ID
It is possible to build a highly reliable large-scale video equipment control system that does not cause setting errors.

[0017]

As described above, in the video equipment control device of the present invention, the video equipments on the common bus # 1, # 2. ． In this way, the ID number for each video device is automatically assigned from the host computer. The ID number is unique to each video device, and each video device analyzes the ID number included in the command and is used to determine whether or not the command is for its own station.

Therefore, hardware such as a DIP switch is not required for each video device connected to the common bus of the host computer, and even when the connection of the video device is changed, the allocation can be easily changed by the host computer, and the manual operation is not required. Since it does not exist, it is possible to avoid troubles such as duplication of ID due to wrong operation. Therefore, it is possible to easily construct a highly reliable large-scale video equipment control system in which an artificial ID setting error does not occur.

[Brief description of drawings]

FIG. 1 is a connection diagram of a host computer and a video device of a video device control apparatus according to an embodiment of the present invention.

FIG. 2 is an internal circuit diagram of a video device according to an embodiment of the present invention.

FIG. 3 is an ID setting flowchart of a video device according to an embodiment of the present invention.

FIG. 4 is a connection diagram of a host computer and a video device of a conventional general video device control device.

[Explanation of symbols]

 1 host computer 2a to 2f video equipment 3 microcomputer 4 command receiving buffer 5 gate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 5/44 A

Claims (1)

[Claims] 1. In a system in which a plurality of video devices are connected to a common bus line of a host computer and the video device is controlled by a command from the host computer, the video devices are individually connected on the common bus line. A video equipment control device characterized in that an ID number can be set from the host computer.