JP3603720B2 - Digital broadcast monitoring system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast monitoring system, and more particularly, to a performance station and a master station transmitting station for receiving a digital broadcast transmitted from the performance station and further transmitting the digital broadcast to the outside. And a digital broadcast monitoring system for monitoring a digital broadcast transmission system having a backup transmission and reception device.
[0002]
[Prior art]
A digital broadcast monitoring system having the above-mentioned active and standby transmission and reception devices is known. Examples of this type of technology are disclosed in Japanese Patent Application Laid-Open No. Hei 5-235908 (Reference 1) and Japanese Patent No. 2735511 (Reference 2). The technique described in Document 1 provides an error rate deterioration detection circuit that counts and protects error codes of a received signal of a data transmission line, detects deterioration of an error rate, and outputs an alarm, and loses frame synchronization of a received signal of the line. The control signal 1 resets the operation of the error rate detection circuit from outside and sends an alarm at the same time as the control signal 1 when a signal transmitted when the reception signal is interrupted.
[0003]
On the other hand, the technique described in Document 2 detects a failure in both the working and standby receiving systems, and on the other hand monitors the signal level of the received signal, and generates a receiving input alarm that occurs at two different preset values. By comparing the time differences, and when the time difference is equal to or longer than a predetermined time, the output of the switching control signal for switching the transmission system in the opposite station is stopped, thereby detecting the silent failure state and improving the reliability of the line. In addition to this, unnecessary switching on the transmission side can be prevented at the time of line deterioration due to natural phenomena such as fading and rainfall.
[0004]
[Problems to be solved by the invention]
Unlike conventional analog broadcasting, this type of digital broadcasting treats video, audio, and data in the same way as digital signals and transmits them. Therefore, deterioration of the error rate is one of the quantitative judgments for system abnormalities and equipment deterioration. become. However, in a digital broadcasting monitoring system for monitoring a digital broadcasting transmission system including a music performance center and a digital broadcasting transmission system including a master broadcasting transmitting station for receiving a digital broadcast transmitted from the music performance broadcasting and transmitting the digital broadcasting to the outside, the transmission at the music playing venue and the master broadcasting transmission center is performed. Conventionally, there has not been a system that detects a deterioration of an error rate of a receiving device and automatically switches a device considered to be abnormal to a standby device immediately and automatically. Documents 1 and 2 do not disclose means for solving this problem.
[0005]
Therefore, an object of the present invention is to provide a digital broadcast monitoring system capable of detecting a deterioration of an error rate of a transmitting and receiving device at a music station and a master station transmitting station and automatically switching a device considered to be abnormal to a spare device immediately. To provide.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention includes a music playing place and a master station transmitting station for receiving a digital broadcast transmitted from the music playing place and further transmitting the digital broadcasting to the outside, and the music playing place and the master station transmitting station are currently used. A digital broadcast monitoring system for monitoring a digital broadcast transmission system having a transmission system and a standby system transmission and reception device, wherein the performance site is operating state information of the transmission and reception device from the performance site and the master station transmission site. And a transmission system switching means for outputting a switching control signal for switching the transmission and reception devices in the performance place and the master station transmission place from the working system to the standby system.
[0007]
According to the present invention, each of the playing place and the master station transmitting station outputs the operating state information of the transmitting and receiving device in its own place to the transmission system switching means in the playing place. The transmission system switching means outputs a switching control signal for switching from the active system to the standby system based on the operation state information.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
First, an outline of the present invention will be described. According to the present invention, each point of the active system and an error rate of an actual received radio wave in a transmission system including a music playing place, a digital broadcasting transmitted from the music playing place, and a master station transmitting the digital broadcasting to the outside are monitored. Accordingly, it is possible to find out at an early stage a problem such as characteristic deterioration due to aging of the transmission system equipment or output disconnection due to a failure, or a failure in normal service. In addition, when an alarm occurs, it is possible to identify which device in the system is deteriorating in characteristics and display it as an alarm on the performance side, and automatically switch the device that seems to be abnormal to the spare device. is there.
[0009]
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a configuration diagram of a digital broadcast monitoring system according to a first embodiment of the present invention. Referring to FIG. 1, the digital broadcast monitoring system includes a music station 30 and a master station transmitting station 40.
[0010]
The performance hall 30 includes a system monitoring and control device (parent device) 1, a system monitoring and control device (child device) 2, system switching devices 3 and 4, a measurement signal switching device 5, a digital broadcast receiver 6, an error rate Measuring instrument 7, OFDM (orthogonal frequency division multiplexing) modulator (current use) 21, OFDM modulator STL (study to transmitter link) transmitter (current) 23, STL transmitter (reserve) 24, L 25 and an air monitor antenna 26.
[0011]
The master station transmitting station 40 includes a system monitoring and control device (slave unit) 8, system switching units 9 and 10, a measurement signal switching unit 11, a digital broadcast receiver 12, an error rate measurement unit 13, a broadcast wave transmitting antenna, and the like. 23, an air monitor antenna 24, an STL receiver (working) 27, an STL receiver (backup) 28, a digital transmitter (working) 29, a digital transmitter (backup) 31, a broadcast wave transmitting antenna 32 , And an air monitor antenna 33.
[0012]
In the performance hall 30, the system monitoring and control device (parent device) 1 has a communication function with the system monitoring and control device (child device) 2 and the system monitoring and control device (child device) 8 of the master station transmitting station 40. Display and evaluation of the measurement data obtained by When an abnormality is found as a result of the evaluation, an alarm is issued and a control signal is sent to the system monitoring and control devices (slaves) 2 and 8. The system monitoring control device (slave unit) 2 has a function of acquiring data from the error rate measuring device 7 and monitoring the status of the system switching devices 3 and 4, stores the obtained information, and monitors the system at regular intervals. The data is transmitted to the control device (master) 1. Further, it receives a control signal from the system monitoring controller (master) 1 and controls switching of the system switches 3 and 4.
[0013]
The system switches (specifically, 3 for the OFDM modulator, 4 for the STL transmitter), 3 and 4 switch from the output of the active device to the output of the standby device in response to a control signal from the system monitoring and control device (child device) 2. The measurement signal switch 5 switches the output signal of the OFDM modulator, the output signal of the STL transmitter, and the input signal of the air monitor antenna at regular intervals, and inputs the measurement signal to the digital broadcast receiver 6. The digital broadcast receiver 6 performs OFDM demodulation on the signal input from the measurement signal switch 5 and outputs a signal for error rate measurement. The error rate measuring device 7 measures the characteristic error of the device and the bit error rate of the digital broadcast generated on the radio wave propagation, and transmits the data to the system monitoring and control device (child device) 2.
[0014]
The STL transmitting antenna 25 is an output of the switch 4, that is, a transmitting antenna for the working STL transmitting device 23 or the standby STL transmitting device 24. The air monitor antenna 26 is an antenna that monitors (receives) a radio wave near the playing place 30.
[0015]
In the master station transmitting station 40, the system monitoring control device (slave unit) 8 has a function of acquiring data from the error rate measuring device 13 and monitoring the status of the system switching devices 9 and 10, and stores the obtained information. Is transmitted to the system monitoring and control device (parent device) 1 at regular intervals. Further, it receives a control signal from the system monitoring control device (parent device) 1 and performs switching control of the system switching devices 9 and 10. The system switches (specifically, 9 is for STL receivers, 10 is for digital transmitters) 9, 10 change from the active operation device output to the standby device output by a control signal from the system monitoring and control device (child device) 8. Switch.
[0016]
The measurement signal switch 11 switches the output signal of the STL receiver, the output signal of the digital transmitter, and the input signal of the air monitor antenna at regular intervals, and inputs the measurement signal to the digital broadcast receiver 12. The digital broadcast receiver 12 performs OFDM demodulation on the signal input from the measurement signal switch 11 and outputs a signal for error rate measurement. The error rate measuring device 13 measures the characteristic error of the device and the bit error rate of digital broadcasting generated on radio wave propagation, and transmits data to the system monitoring and control device (slave device) 8.
[0017]
The broadcast wave transmitting antenna 32 is a transmitting antenna for the output of the switch 10, that is, the working digital transmitter 29 or the standby digital transmitter 31. The air monitor antenna 33 is an antenna that monitors (receives) radio waves from the broadcast wave transmitting antenna 32. Next, the operation of the present invention will be described with reference to FIG. At the master station transmitting station 40, each point of the working system of the transmitting system, specifically, the output signal of the STL receiver, the output signal of the digital transmitter, and the input signal of the air monitor antenna are input to the measurement signal switch 11, and the digital broadcasting is performed. The signal is switched and output to the receiver 12 at regular intervals. The digital broadcast receiver 12 performs OFDM demodulation of the input signal and outputs an error rate measuring signal to the error rate measuring device 13.
[0018]
The error rate measuring device 13 measures the bit error rate of the digital signal output from the digital broadcast receiver 12. The system monitoring controller (slave) 8 collects and stores the data of the error rate measurement and the states of the system switches 9 and 10. The information stored in the system monitoring and control device (slave unit) 8 is transmitted to the system monitoring and control device (master unit) 1 at regular intervals, and the error rate measurement result, the state of the system switch are displayed, and the error is displayed. The rate data is compared with a predetermined reference value, and the data is evaluated. As a result, if any data is lower than the reference value, an alarm is displayed, and a control signal is transmitted to the system monitoring device (slave device) 8 so as to specify a device considered to be abnormal and to switch to the spare device. I do.
[0019]
The system monitoring device (slave unit) 8 receives the control signal, controls the switching of the system switch 9 or the system switch 10, and switches from the operation of the active device to the operation of the standby device.
[0020]
In the music hall 30, the error rate measurement of the output signal of the OFDM modulator, the output signal of the STL transmitter, and the input signal of the air monitor antenna is performed in the same procedure as described above. The rate measurement results and the states of the system switches 3 and 4 are collected and transmitted to the system monitoring and control device (master) 1 at regular intervals.
[0021]
The information and data are processed in the system monitoring control device (master device) 1 in the same manner as described above, and if there is a device that seems to be abnormal, an alarm is displayed and switching to standby device operation is performed.
[0022]
In this way, by monitoring the error rate of important points in the active system, when a problem is detected early or an alarm is generated, the device considered to be abnormal can be immediately identified and switched to the standby system to improve the problem. Will be possible.
[0023]
Next, a second embodiment will be described. FIG. 2 is a configuration diagram of the second embodiment. Referring to the figure, the digital broadcast monitoring system includes a music station 30, a master station transmitting station 50, and a relay station 60 similar to those in the first embodiment. The details of the configuration of the master station transmitting station 50 and the relay station 60 will only be illustrated. In short, each of the transmitting station 50 and the relay station 60 is also provided with system monitoring devices (slave units) 51 and 61 similar to the system monitoring device (slave unit) 2 of the performance room 30, and the system monitoring of the performance room 30 is performed. The device (parent device) 1 sends a switching control signal to the standby device to the system monitoring devices (child devices) 2, 51 and 61 based on the error rate measurement results from the system monitoring devices (child devices) 2, 51 and 61. Send out.
[0024]
In this way, not only the combination of the performance center and the transmitting station of the master station, but also the combination of three persons of the performance station, the transmitting station of the master station and the relay station, or the combination of four or more persons as shown in FIG. The present invention can also be applied to the present invention.
[0025]
Further, in the present invention, the system monitoring device (master device) 1 is provided in the music hall 30, but the system monitoring device (master device) 1 may be provided in the master station transmitting stations 40 and 50 or the relay station 60. is there.
[0026]
Further, in the above-described embodiment, the transmission method of the music station and the master station transmission station has been described using the STL link. However, for example, transmission using an optical cable or the like can be applied to the present invention regardless of the wired / wireless transmission method. It is possible.
[0027]
【The invention's effect】
According to the present invention, the music station includes a music station and a master station transmitting station for receiving digital broadcasts transmitted from the music station and further transmitting the digital broadcasting to the outside. A digital broadcast monitoring system for monitoring a digital broadcast transmission system having a transmission and reception device, wherein the performance site performs the performance based on operation state information of the transmission and reception device from the performance site and the master station transmission site. And a transmission system switching means for outputting a switching control signal for switching the transmitting and receiving device in the master station transmitting station from the working system to the standby system. , It is possible to automatically switch the device considered to be abnormal to the standby device automatically.
[0028]
Specifically, firstly, it is possible to catch the characteristic deterioration and the equipment failure due to the aging of the transmission system equipment at an early stage. Second, it is possible to specify which device has a characteristic deterioration or a failure. Third, a device considered to be abnormal can be automatically switched to a spare device immediately, without the need for the user of the system to go to the master station transmitting station.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a digital broadcast monitoring system according to a first embodiment of the present invention.
FIG. 2 is a configuration diagram of a second embodiment.
[Explanation of symbols]
1 system monitoring and control device (master unit)
2,8,51,61 System monitoring and control unit (child unit)
3,4,9,10 System switcher 7,13 Error rate measuring instrument 30 Performer 40,50 Master station transmitter 60 Relay station

Claims (6)

A performance center and a master station transmitting station for receiving and further transmitting a digital broadcast transmitted from the performance center, and the performance center and the master station transmission station have active and standby transmission and reception devices. A digital broadcast monitoring system for monitoring a digital broadcast transmission system,
The performance center changes the transmission and reception devices in the performance center and the master station transmission station from the working system to the standby system based on operating state information of the transmission and reception devices from the performance center and the master station transmission station. A digital broadcast monitoring system, comprising: a transmission system switching unit that outputs a switching control signal for switching to a digital broadcast. The performance center includes first error rate measuring means for measuring an error rate of one of a working system and a standby system of a transmission device in the performance room, and the master station transmission station receives and transmits data in the master station transmission station. A second error rate measuring means for measuring an error rate of one of an active system and a standby system of the device, wherein the transmission system switching means includes an error rate measurement result outputted from the first and second error rate measuring means. 2. The digital broadcast monitoring system according to claim 1, wherein the switching control signal is output based on the switching signal. 3. The digital broadcast monitoring system according to claim 2, wherein said first error rate measuring means further receives an external signal and measures an error rate of the received signal. 4. The digital broadcast monitoring system according to claim 2, wherein said second error rate measuring means further receives a transmission signal from said master station transmitting station and measures an error rate of the received signal. The transmission system switching means includes comparison means for comparing the error rate measurement results output from the first and second error rate measurement means with a reference value, and outputs the switching control signal based on the comparison result. The digital broadcast monitoring system according to any one of claims 2 to 4, wherein The digital transmission device according to any one of claims 1 to 5, wherein the transmission system switching means displays an alarm based on operation state information of the transmission and reception devices from the performance place and the master station transmission place. Broadcast monitoring system.

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