JPS637080A - Supervisory control system - Google Patents

Abstract

PURPOSE:To eliminate the need for high-degree technique even in case of transmitting a great quantity of necessary data by dividing the data which is necessary to switch a TV broadcasting program in a local station for itself into plural blocks and transmit ting them by using one section in the vertical flyback time of a video signal in TV broadcasting network. CONSTITUTION:In a TV broadcasting network consisting of a key station 1, local stations 2, 3, 4, 6, 7 and 8 and a semilocal station 5, in case of switching the program in the local station 2, the data received in a timing illustrated in figure is received in plural blocks, whose contents is decided as one data and if the contents of the data is the one which is switched to the line of the key station 1 side, the station 2 switches the broadcasting line from a self-station to the station 1 side. Other local stations and the semilocal station can do in the same way. Thus the data necessary to switch the program is devided into plural and transmitted by using one section in the vertical flyback time of the video signal.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides TV broadcast programs or C'Ms (in the present invention, these are referred to as TV programs, etc.) to local stations based on instructions from key stations or semi-local stations. This relates to a supervisory control method that switches independently on a unit-by-unit basis.

(Prior Art) Conventionally, this type of supervisory control system uses one section within a vertical retrace period of a video signal for control data.

It used a method of transmitting all data.

(Problems to be Solved by the Invention) The conventional supervisory control method described above uses one section within the vertical retrace section, but the section is as short as about 40 μs, making it difficult to transmit large amounts of data. The disadvantage is that it requires advanced technology, resulting in an increase in the price of the entire system.

(Means for Solving the Problems) A supervisory control system according to the present invention includes a key station, and a plurality of local stations and semi-local stations connected to the key station via a communication line and a communication line network.

In a TV broadcasting network consisting of a plurality of local stations connected to the semi-local station by a communication line and a communication line network, the local station and the semi-local station independently broadcast TV programs such as TV broadcast programs and commercials. The data necessary for switching is divided into a plurality of blocks and transmitted using one section within the vertical blanking period of the video signal.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a supervisory control system according to an embodiment of the present invention. In this figure, 1 is a local station with keys 8.2° 3.4 and 6.7.8, and 5 is a semi-local station.

First, key station 1 and semi-local station 5 have communication line 11.15.
are connected to the communication line network 9 through the local stations 2, 3 .
4 is connected to the communication network 9 through communication lines 12, 13, and 14. Also, semi-local station 5 and local station 6
7.8 is connected to the communication network 10 through communication lines 16.17 and 18.19.

FIG. 2 shows the operation timing of the program switching signal sent from the key station 1, and FIG. 3 shows details of one block of data in FIG. When the local station 2 switches programs, the receiver receives a plurality of blocks of data as shown in FIG. 3 at the timing shown in FIG. 2, and uses this as one data to judge the content.

If the data content is to switch to the line on the key station 1 side, the local station 2 broadcast line is switched from the local station to the key station 1 side. The same applies to other local stations and semi-local stations. In addition, in this embodiment, the interval in which data is superimposed is an odd number field, and 19H1 is an even number field.
I am using 82H. In this way, the present invention divides the data necessary for switching one program into multiple parts and uses one section within the vertical retrace period of the video signal.1. and transmit it.

(Effects of the Invention) As explained above, in the present invention, data is divided into multiple parts and transmitted, so when transmitting one divided data, the speed is lower than when transmitting all data at once. It turns out. This means that when a large amount of data is required, it is enough to increase the number of data divisions and transmit it, without requiring particularly sophisticated technology, which ultimately leads to a reduction in the price of the system. There are advantages.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a supervisory control system according to an embodiment of the present invention, FIG. 2 is a diagram showing the operation timing of a program switching signal from a key station in an embodiment of the present invention, and FIG. FIG. 3 is a diagram showing details of data contents of one block. 1...Key station. 2.3, 4, 6, 7.8... Local station, 5... Semi-local station, 9.10... Communication line network. 1 and 19... Communication line.

Claims (1)

[Claims] A key station, a plurality of local stations and semi-local stations connected to the key station by a communication line and a communication line network, and a plurality of local stations connected to the semi-local station by a communication line and a communication line network. In a monitoring control system for a TV broadcasting network, the data necessary for independently switching TV programs, etc. at the local station or semi-local station is divided into multiple blocks, and one block within the vertical blanking period of the video signal is divided into multiple blocks.
A supervisory control method characterized by using two sections for transmission.