JP2001285727A - Transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmitter for reducing the number of spare transmitters, simplifying constitution, performing miniaturization and reducing costs by sharing the spare transmitter. SOLUTION: In this transmitter, the state of plural active transmitters 2 is monitored by a monitoring device 13, and when a fault is present, a program inputted to the active transmitter 2 is outputted through a distributor 1 to the spare transmitter 3 and program output from the active transmitter 2 without the fault and the spare transmitter 3 is selectively switched and outputted to an antenna by an antenna multicoupler 12 with a switching function.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting device,
In particular, the digital terrestrial T which can reduce the number of backup transmitters
The present invention relates to a transmission device for V broadcast.

[0002]

2. Description of the Related Art Conventional terrestrial digital broadcasting STL / TT
L (Studio Transmitter Link / Transmitter Transmitt
er Link) devices (transmitting devices) include a working transmitting device and a backup transmitting device that is switched when a failure occurs in the working transmitting device. The above-mentioned conventional transmitting apparatus will be described with reference to FIG. FIG. 3 is a configuration block diagram of a conventional transmission device. FIG. 3 shows a conventional transmission device.
As shown in the figure, the distributor 1
, A working transmission device 2, a protection transmission device 3, a working / protection switching device 4, and an antenna 5. In other words, the programs A to D are provided with the above-described configuration, and a transmission station is formed by collecting the programs. Here, the program is a broadcast program (broadcast wave).

[0003] Next, the operation of the conventional transmitting apparatus will be described. In the facility A, the input program is distributed by the distributor 1, and the working transmitter 2 and the backup transmitter 3
Is input to The switch 4 normally selects the working transmission device 2. However, when an abnormality or the like occurs in the working transmission device 2, the switching device 4 switches to the backup transmission device 3 and outputs the signal from the antenna 5. The above operation is similarly performed for the BD equipment.

[0004]

As described above, the conventional transmitting apparatus for terrestrial digital TV broadcasting includes an active transmitting apparatus / standby transmitting apparatus (active / standby) for transmitting one program. In order to transmit a plurality of programs, facilities such as (number of transmission programs) × (current / spare) are required as in the case of the facilities A to D in FIG. 3, so that the facilities cannot be simplified and the cost increases. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. By using a common backup transmission device, the number of backup transmission devices can be reduced, the configuration can be simplified and the size can be reduced, and the cost can be reduced. The purpose is to provide.

[0006]

According to the present invention for solving the above-mentioned problems of the prior art, the status of a plurality of active transmitting devices is monitored by a monitoring device, and if there is a failure, the status is input to the active transmitting device. A transmission device that outputs a program to a spare transmission device via a distributor and selectively switches a program output from a working transmission device and a spare transmission device that do not have a failure in an antenna duplexer and outputs the program output to an antenna. Can be reduced.

[0007]

Embodiments of the present invention will be described with reference to the drawings. A transmitting apparatus for terrestrial digital TV broadcasting according to an embodiment of the present invention includes a plurality of active transmitting apparatuses for transmitting a plurality of programs, a plurality of distributors for distributing a program input to the active transmitting apparatus, and an active transmitting apparatus. A standby transmission device that switches when a failure occurs, a monitoring device that monitors a plurality of active transmission devices to detect a failure, and outputs a program input to the active transmission device of the detected failure to the standby transmission device via a distributor. A program switcher
An antenna duplexer for selectively outputting, to the antenna, a program from an active transmission device having no failure and a program from a backup transmission device in place of the active transmission device having a failure; , The number of backup transmission devices can be reduced, the configuration can be simplified, the size can be reduced, and the cost can be reduced.

[0008] A transmitting apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram illustrating a configuration of a transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 1, the transmitting apparatus according to the present embodiment includes distributors 1a to 1d.
, Active transmitting devices 2a to 2d, and standby transmitting devices 3a, 3
b, an antenna 5, a program switcher 11, an antenna duplexer 12 with a switching function, and a monitoring device 13. In FIG. 1, the distributor 1 and the working transmitter 2 are each assigned 4
Although the number of the spare transmission devices 3 is two, the number is not limited to these.

Next, each section of the transmitting apparatus will be specifically described. The distributors 1a to 1d receive the programs A to D, respectively, distribute the programs, output the programs to the corresponding active transmitters 2a to 2d, and output the programs to the program switch 11. The active transmission devices 2a to 2d perform transmission processing of the program input from the distributors 1a to 1d, and output to the antenna duplexer 12 with a switching function.

The spare transmitting devices 3a and 3b are used instead of the active transmitting devices 2a to 2d when a failure occurs in any of the active transmitting devices 2a to 2d, and perform a process of transmitting a program input from the program switch 11. And outputs it to the antenna duplexer 12 with the switching function.

The antenna 5 is an antenna duplexer 1 having a switching function.
2 is emitted into the air by radio waves.
The program switch 11 selects a program input from the distributors 1a to 1d based on a signal from the monitoring device 13, and outputs the selected program to one of the backup transmitters 3a and 3b.
The specific contents of the program switch 11 and the monitoring device 13 will be described later with reference to FIG.

The antenna duplexer 12 with the switching function selectively switches the transmission signals of the programs input from the active transmission devices 2a to 2d and the standby transmission devices 3a and 3b, and outputs them to the antenna 5.

The monitoring device 13 includes the active transmission devices 2a to 2d
And outputs a detection result to the program switch 11 and the antenna duplexer 12 having a switch function.

Next, the operation of the transmitting apparatus according to the embodiment of the present invention will be described. First, a case where there is no failure in the transmission device will be described. The programs A to D are input to the respective distributors 1a to 1d, and the distributor 1 distributes the programs. The distributed program is output to the corresponding active transmitters 2a to 2d and also to the program switch 11.

Then, the transmission processing of the program is performed in each of the active transmission devices 2a to 2d, and is output to the antenna duplexer 12 with the switching function. The antenna duplexer 12 with the switching function selectively switches input signals from the active transmitters 2 a to 2 d and outputs the signals to the antenna 5. Then, a transmission signal is transmitted from the antenna 5 as a radio wave.

Next, a case where there is a failure in the transmission device will be described. For example, when a failure occurs in the active transmission device 2a, the monitoring device 13 detects the failure, and
a signal indicating that a is a fault
And output to the antenna duplexer 12 having the switching function.

When a signal indicating that the active transmission device 2a is faulty is input to the program switch 11, the program switch 11 outputs the faulty active transmission device 2a from among the programs input from the distributor 1. Is selected and output to, for example, the preliminary transmission device 3a.

The spare transmission device 3a performs a transmission process of the input program and outputs the program to the antenna duplexer 12 with a switching function. The antenna duplexer 12 with the switching function selectively outputs signals to the antenna 5 while switching signals from the normal working transmitters 2b to 2d and the spare transmitter 3a.

Here, if the number of the spare transmitting devices 3 is increased,
Even if the active transmitting devices 2 corresponding to the number simultaneously fail, it is possible to cope with the trouble. Therefore, the number of backup transmission devices is determined according to the communication environment in which the transmission device is installed. That is, a plurality of backup transmission devices can be connected depending on the number or reliability of the active transmission devices (transmission programs), the importance of the transmission programs, and the like.

Next, the program switch 11 and the monitoring device 1
3 will be specifically described with reference to FIG. FIG. 2 is a circuit configuration diagram of the program switch and the monitoring device according to the embodiment of the present invention. As shown in FIG. 2, the program switcher 11 has four input terminals to which the program is input from the distributor 1, and outputs the program to the auxiliary transmission device 3.
It has two output terminals.

Further, the program switch 11 is composed of a plurality of distributors 11a for distributing the program input from the input terminal into two, and a relay switch 11b for sequentially switching the programs output from the distributor 11. ing. Further, the relay switching unit 11b includes a plurality of switches S
W1 to SW5.

The monitoring device 13 receives an input of a signal from the active transmission device, and determines an operation state by an operation state information determination unit 13.
a, and a relay control signal output unit 13b that controls a switch of the relay switching unit 11b based on the result determined by the operation state information determination unit 13a.

Here, the relay control signal output from the relay control signal output unit 13b causes the relay switching unit 11
Each switch SW of b is turned on / off to select a program input from an input terminal and output it to a specific output terminal.

Digital terrestrial T according to an embodiment of the present invention
According to the transmission apparatus such as the V broadcast STL / TTL apparatus, the program switching unit 11 selects the program to be input to the active transmission apparatus in which the failure has occurred by sharing the backup transmission apparatus 3 with the active transmission apparatus 2. Since the configuration is provided to the backup transmission device 3, there is an effect that the configuration of the device can be simplified to reduce the size and cost.

[0025]

According to the present invention, the status of a plurality of active transmission devices is monitored by a monitoring device, and if there is a fault, a program input to the active transmission device is output to a backup transmission device via a distributor. Since the transmission device selectively switches the program output from the active transmission device and the backup transmission device with no interference in the antenna duplexer and outputs the output to the antenna, the number of backup transmission devices can be reduced, the configuration is simplified, and the size is reduced. Has the effect of reducing costs.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a transmission device according to an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of a program switch and a monitoring device according to an embodiment of the present invention.

FIG. 3 is a configuration block diagram of a conventional transmission device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Distributor, 2 ... Working transmitter, 3 ... Stand-by transmitter, 4 ... Switcher, 5 ... Antenna, 11 ... Program switcher, 11a ... Distributor, 11b ... Relay switching part,
Reference numeral 12: an antenna duplexer with a switching function; 13, a monitoring device; 13a, an operation state information determination unit; 13b, a relay control signal output unit

Claims (1)

[Claims] 1. A transmitting apparatus for terrestrial digital TV broadcasting, comprising: a plurality of active transmitting apparatuses for transmitting a plurality of programs; a plurality of distributors for distributing a program input to the active transmitting apparatus; A standby transmission device that switches when a failure occurs, a monitoring device that monitors the plurality of active transmission devices to detect a failure, and a program that is input to the active transmission device of the detected failure via the distributor and transmits the program that is input to the distribution device. A program switch for outputting to a device, an antenna duplexer for selectively outputting a program from the active transmission device without the fault and a program from the backup transmission device in place of the faulty active transmission device to the antenna A transmission device comprising: