JP2007028317A - Distribution/bypass switching apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distribution/bypass switching apparatus for realizing system switching of a digital broadcast signal even when a failure occurs in the distributing system. <P>SOLUTION: The digital broadcast signal inputted by an input switch 11 and a bypass switch 13 is selectively guided to a distribution system 12 and bypass routes 17, 18 using bypass routes 17, 18 for bypassing the distribution system 12. the digital broadcast signal of system 1 distributed with the distribution system 12 with an output switch 14 and the digital broadcast signal of the system 1 having passed the bypass route 17 are selectively outputted to a system switching apparatus 15 in the subsequent stage. The digital broadcast signal of system 2 distributed with the distribution system 12 with an output switch 16 and the digital broadcast signal of the system 2 having passed the bypass route 18 are selectively outputted to the system switching apparatus 15 in the subsequent stage. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a distribution / bypass switching device that is used in, for example, a broadcasting station or the like and reduces an influence on a subsequent system when a duplex system is constructed by distributing one system of input signals.

  2. Description of the Related Art Conventionally, it is common for broadcast transmission facilities to have a working / standby duplex configuration for equipment failure countermeasures and maintenance (for example, Patent Document 1). Some duplex systems distribute one signal to the active / standby system using a distribution system.

  By the way, in the above duplex system, when a failure occurs in the active system, the system is switched to the standby system at a later stage. However, a failure in the distribution system cannot interrupt the failure even if the system is switched because the input signal to each system is interrupted.

Therefore, in analog broadcasting, a method is considered in which a distribution system with a high input impedance is prepared for each system and the signals are distributed by connecting them in parallel.
JP 2001-217753 A.

  However, in digital broadcasting, even if a distribution system is prepared for each system and they are connected in parallel, if the delay and phase between signals in each distribution system are slightly shifted, before and after system switching at the subsequent stage As a result, discontinuity occurs in the signal, and the signal quality of the switching output deteriorates.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a distribution / bypass switching device capable of switching the system of a digital broadcast signal even if a failure occurs in the distribution system.

In order to achieve the above object, the present invention is configured as follows.
Used in a digital broadcast signal transmission system for selectively deriving the first and second digital broadcast signals distributed by the distributor by the system switching device, and the digital broadcast signal input to the distributor is the first system A first bypass path for bypassing the distributor as a digital broadcast signal, a second bypass path for bypassing the distributor as a digital broadcast signal input to the distributor as a second system digital broadcast signal, and a digital broadcast signal A distributor, input switching means selectively deriving to the first bypass path and the second bypass path; a first digital broadcast signal distributed by the distributor; and the first that has passed through the first bypass path. A first output switching means for selectively outputting the system digital broadcast signal to the system switching device, a second system digital broadcast signal distributed by the distributor, and a second A second output switching means for selectively outputting the second digital broadcast signal that has passed through the bypass path to the system switching device, and a distributor, first and second bypass paths according to a user's designated operation. And an input switching unit and switching control means for switching control of the first and second output switching units so as to select any one of them.

  According to this configuration, the first and second bypass paths that bypass the distributor are used to selectively derive the digital broadcast signal input by the input switch to the distributor and the first and second bypass paths. Then, the first system digital broadcast signal distributed by the distributor by the first output switching unit and the first system digital broadcast signal passing through the first bypass path are selectively output to the subsequent system switching device. Then, the second system digital broadcast signal distributed by the distributor by the second output switching unit and the second system digital broadcast signal passing through the second bypass path are selectively output to the subsequent system switching device. It is configured to do.

  Therefore, it is possible to secure the transmission paths of the first and second digital broadcast signals to the system switching device when a failure occurs in the distributor, whereby the system switching of the digital broadcast signal is performed by the system switching device. be able to.

  Further, it comprises failure detection means for detecting a failure of the distributor, and notification means for notifying the user when the failure of the distributor is detected by the failure detection means, and the switching control means includes the notification means. When the user performs a switching designation operation to the first and second bypass paths in response to the notification, the input switching means and the first and second output switching means are controlled to switch.

  According to this configuration, whenever a failure occurs in the distributor, the user can perform switching operation to the first and second bypass paths by himself / herself.

  Used in a digital broadcast signal transmission system for selectively deriving the first and second digital broadcast signals distributed by the distributor by the system switching device, and the digital broadcast signal input to the distributor is the first system A first bypass path for bypassing the distributor as a digital broadcast signal, a second bypass path for bypassing the distributor as a digital broadcast signal input to the distributor as a second system digital broadcast signal, and a digital broadcast signal A distributor, input switching means selectively deriving to the first bypass path and the second bypass path; a first digital broadcast signal distributed by the distributor; and the first that has passed through the first bypass path. A first output switching means for selectively outputting the system digital broadcast signal to the system switching device, a second system digital broadcast signal distributed by the distributor, and a second A second output switching means for selectively outputting the second digital broadcast signal that has passed through the bypass path to the system switching device, a fault detection means for detecting a fault in the distributor, and a distributor by the fault detection means Acquisition means for acquiring the system information indicating the system switched from the system switching device, and the first and second bypass paths based on the system information acquired by the acquisition means And an input switching unit and switching control means for switching control of the first and second output switching units so as to select any one of them.

  According to this configuration, when the failure of the distributor occurs, information indicating the system being sent out is acquired by the system switching device, and one of the first and second bypass paths is selected based on this information. The input switching device and the first and second output switching devices are automatically switched. Therefore, even when the user is not resident nearby, the system switching of the digital broadcast signal in the system switching device can be continuously performed when a failure occurs in the distributor.

  As described above in detail, according to the present invention, it is possible to provide a distribution / bypass switching device that can perform system switching of digital broadcast signals even when a failure occurs in the distribution system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing the configuration of a digital broadcast signal transmission system to which a distribution / bypass switching apparatus according to the first embodiment of the present invention is applied.

  In this distribution / bypass switching device, a digital broadcast signal is input and is selectively led to the distribution system 12 and the bypass switching device 13 by the input switching device 11. The digital broadcast signal input to the distribution system 12 is distributed to the first system and the second system. Among these, the 1-system digital broadcast signal is input to the system switching device 15 via the output switch 14. In addition, the 2-system digital broadcast signal is input to the system switching device 15 via the output switch 16. The system switching device 15 switches from system 1 to system 2 or from system 2 to system 1 according to the system switching signal.

  On the other hand, the bypass switch 13 selectively guides the digital broadcast signal derived by the input switch 11 to the bypass paths 17 and 18. The digital broadcast signal as one system that has passed through the bypass path 17 is led to the system switching device 15 by the output switch 14. Further, the digital broadcast signal as the second system that has passed through the bypass path 18 is led to the system switching device 15 by the output switch 16.

  The input switching unit 11, the bypass switching unit 13, and the output switching units 14 and 16 are switched by a switching controller 19.

  Further, when a failure occurs, the distribution system 12 displays a message to that effect on the monitor 20.

Next, the operation in the above configuration will be described.
Now, the output switching unit 14 leads the first system digital broadcast signal distributed by the distribution system 12 to the system switching device 15, and the output switching unit 16 distributes the second system digital broadcasting signal by the distribution system 12. It is assumed that the signal is derived to the system switching device 15.

  Then, it is assumed that the system switching device 15 switches to the 1-system digital broadcast signal.

  Here, it is assumed that a failure has occurred in the distribution system 12. Then, a message indicating that a failure has occurred is supplied from the distribution system 12 to the monitor 20 for display. Therefore, the operator (user) can know that a failure has occurred in the distribution system 12 by this display.

  In this state, it is assumed that the operator inputs a switching instruction at an input unit (not shown) to select the bypass route 17. Then, the switching controller 19 performs switching control of the input switching unit 11, the bypass switching unit 13, and the output switching units 14 and 16 so as to select the bypass path 17, as shown in FIG.

  On the other hand, when a failure occurs in the distribution system 12 in a state where the system switching device 15 is outputting the 2-system digital broadcast signal, the switching controller 19 receives an operation from the operator as shown in FIG. In response to the switching instruction, the input switching device 11, the bypass switching device 13, and the output switching devices 14 and 16 are controlled so as to select the bypass path 18.

  As described above, in the first embodiment, by using the bypass paths 17 and 18 for bypassing the distribution system 12, the digital broadcast signal input by the input switch 11 and the bypass switch 13 is distributed to the distribution system 12, the bypass path. 17 and 18 selectively switching the system 1 digital broadcast signal distributed by the distribution system 12 by the output switch 14 and the system 1 digital broadcast signal passing through the bypass path 17 to the subsequent system switching Output to the device 15 and selectively output the two-system digital broadcast signal distributed by the distribution system 12 by the output switch 16 and the two-system digital broadcast signal passed through the bypass path 18 to the system switching device 15 at the subsequent stage. Like to do.

  Accordingly, it is possible to secure transmission paths for the 1-system and 2-system digital broadcast signals to the system switching device 15 when the failure of the distribution system 12 occurs. It can be carried out.

  In the first embodiment, every time a failure occurs in the distribution system 12, the fact that the failure has occurred is displayed on the monitor 20, so that the operator himself / herself connects to the bypass paths 17 and 18. Switching operation can be performed.

(Second Embodiment)
FIG. 4 is a block diagram showing the configuration of a digital broadcast signal transmission system to which the distribution / bypass switching device according to the second embodiment of the present invention is applied. In FIG. 4, the same parts as those in FIG.

  That is, the failure detector 21 detects the failure of the distribution system 12 and notifies the switching controller 22 of the detection result. Then, the switching controller 22 acquires information indicating the system “1 system” being sent out from the system switching device 15 and selects the bypass path 17 based on the acquired information. The bypass switch 13 and the output switches 14 and 16 are controlled to be switched.

  As described above, in the second embodiment, the failure occurrence of the distribution system 12 is detected by the failure detector 21 and the detection result is notified to the switching controller 22. Then, the switching controller 22 recognizes the occurrence of the failure of the distribution system 12 from the notified detection result, acquires information indicating the system being transmitted from the system switching device 15, and uses the bypass path 17, The switching control of the input switching unit 11, the bypass switching unit 13, and the output switching units 14 and 16 is automatically performed so that one of 18 is selected.

  Therefore, even when the operator is not resident nearby, the system switching of the digital broadcast signal in the system switching device 15 can be continuously performed when a failure of the distribution system 12 occurs.

(Other embodiments)
The present invention is not limited to the above embodiments. For example, in each of the above-described embodiments, the example in which the input switch 11 and the bypass switch 13 are used as the input switching unit has been described. However, the present invention is not limited to this. For example, the digital broadcast signal may be selectively led to the distribution system 12 and the bypass paths 17 and 18 by one input switch.

  In addition, the system configuration, switching procedure, and the like can be variously modified and implemented without departing from the gist of the present invention.

1 is a block diagram showing a configuration of a digital broadcast signal transmission system to which a distribution / bypass switching device according to a first embodiment of the present invention is applied. The figure which shows the example of switching operation | movement in the case of selecting a 1-system bypass path in the first embodiment. The figure which shows the example of switching operation | movement in the case of selecting the 2nd system bypass path | route in the said 1st Embodiment. The block diagram which shows the structure of the digital broadcast signal transmission system with which the distribution and bypass switching apparatus concerning 2nd Embodiment of this invention is applied.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Input switching device, 12 ... Distribution system, 13 ... Bypass switching device, 14, 16 ... Output switching device, 15 ... System switching device, 17, 18 ... Bypass path, 19 ... Switching controller, 20, 22 ... Monitor, 21 ... Fault detector.

Claims (3)

Used in a digital broadcast signal transmission system that selectively derives the first system and second system digital broadcast signals distributed by the distributor by the system switching device,
A first bypass path that bypasses the distributor as a digital broadcast signal input to the distributor as the first system digital broadcast signal;
A second bypass path for bypassing the distributor as a digital broadcast signal of the second system as a digital broadcast signal input to the distributor;
Input switching means for selectively deriving the digital broadcast signal to the distributor, the first bypass path and the second bypass path;
First output switching means for selectively outputting the first system digital broadcast signal distributed by the distributor and the first system digital broadcast signal passing through the first bypass path to the system switching device. When,
Second output switching means for selectively outputting the second system digital broadcast signal distributed by the distributor and the second system digital broadcast signal passing through the second bypass path to the system switching device. When,
Switching for switching control of the input switching unit and the first and second output switching units so as to select any one of the distributor and the first and second bypass paths according to a user's designated operation. A distribution / bypass switching device comprising a control means. Further, a failure detection means for detecting a failure of the distributor;
In the case where a failure of the distributor is detected by the failure detection means, a notification means for notifying the user to that effect,
The switching control unit is configured to switch the input switching unit, the first and second output switching units when a user performs a switching designation operation to the first and second bypass paths in response to the notification by the notification unit. 2. The distribution / bypass switching device according to claim 1, wherein switching control is performed. Used in a digital broadcast signal transmission system that selectively derives the first system and second system digital broadcast signals distributed by the distributor by the system switching device,
A first bypass path that bypasses the distributor as a digital broadcast signal input to the distributor as the first system digital broadcast signal;
A second bypass path for bypassing the distributor as a digital broadcast signal of the second system as a digital broadcast signal input to the distributor;
Input switching means for selectively deriving the digital broadcast signal to the distributor, the first bypass path and the second bypass path;
First output switching means for selectively outputting the first system digital broadcast signal distributed by the distributor and the first system digital broadcast signal passing through the first bypass path to the system switching device. When,
Second output switching means for selectively outputting the second system digital broadcast signal distributed by the distributor and the second system digital broadcast signal passing through the second bypass path to the system switching device. When,
A failure detection means for detecting a failure of the distributor;
An acquisition means for acquiring system information indicating a system switched from the system switching device when a failure of the distributor is detected by the failure detection means;
Based on the system information acquired by the acquisition means, the input switch, the first output switch, and the second output switch are controlled so as to select one of the first and second bypass paths. A distribution / bypass switching device comprising switching control means.

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