JP2007251773A - Transmission system, transmission device and reception device thereof - Google Patents

Abstract

[PROBLEMS] To provide a transmission system capable of automatically performing any transmission of large capacity / short time, small capacity / long time, etc. according to the availability of the satellite line and improving the effective utilization rate of the satellite line. provide.
Using a monitoring / control line provided in a satellite line, a slave station RS1, RS2 notifies a master station TS of a transmission request including a priority of transmission signals and a transmission purpose, and a monitoring unit of the master station TS 22 is used to monitor the availability of the satellite line, and the transmission band controller 21 controls the encoding circuit 11, the modulation circuit 12, and the modems 191 to 19n on the basis of the monitoring result, the priority order, and the transmission purpose. Control information for variably setting the first variable area and the second variable area of the line is generated, and this control information is notified to the slave stations RS1 and RS2 via the monitoring / control line, and the transmission band is assigned to the transmission signal. Control is executed.
[Selection] Figure 1

Description

  The present invention relates to a transmission system that transmits video, audio, data, and the like from a transmitting station to a plurality of receiving stations via a satellite line, and a transmitting apparatus and a receiving apparatus thereof.

  In the broadcasting system, a transmission system is constructed in which a transmitting station and a receiving station are connected by a satellite line. This satellite line is allocated on the frequency axis with multiple video lines for video / audio / data transmission and a communication line for communication between the master and slave stations within a predetermined band. It has been.

  By using such a system, the master station can transmit broadcast signals to a large number of slave stations installed at remote locations.

  By the way, in the above transmission system, since the maximum number of video lines allocated in the satellite line is determined in advance, the line is filled immediately when the transmission frequency is high, and the line is filled when the transmission frequency is low. Are often left unoccupied, and the use efficiency of the satellite line is poor.

Conventionally, the master station and each slave station are connected via a terrestrial network separately from the satellite circuit, and when the satellite circuit is full, video, audio, and data are transmitted via the terrestrial network. There is also a technique to perform (for example, Patent Document 1).
JP 2001-53824 A.

  However, in the above method, since a terrestrial network must be laid between the master station and each slave station separately from the satellite line, the system configuration becomes large and the equipment cost increases. Will end up.

  Accordingly, an object of the present invention is to automatically perform any transmission of large capacity / short time, small capacity / long time, etc. according to the availability of the satellite line, and to improve the effective utilization rate of the satellite line. It is an object of the present invention to provide a transmission system that can be realized and a transmission device and a reception device thereof.

In order to achieve the above object, the present invention is configured as follows.
A transmission signal is transmitted to a satellite line composed of a first transmission band for signal transmission to which the highest priority is assigned and a second transmission band for signal transmission other than the highest priority, on the transmission side, and the satellite line on the reception side. In the transmission system for receiving the transmission signal from the transmission side, the transmission side is connected via monitoring means for monitoring the usage status of the first and second transmission bands of the satellite line, and the monitoring / control line provided in the satellite line from the reception side. The first and second transmissions based on the request receiving means for receiving the transmission request sent and including the priority of the transmission signal and the transmission purpose, and the monitoring result obtained by the request receiving means and the monitoring means. Control means for controlling the bandwidth of each band and executing transmission band allocation control for transmission signals, and the receiving side transmits a transmission request to the transmitting side via a satellite line monitoring / control line. It is obtained so as to comprise a stage.

  According to this configuration, the priority and the transmission purpose of the transmission signal are notified from the reception side to the transmission side using the monitoring / control line provided in the satellite line, and the first and second satellite lines are notified on the transmission side. The usage status of the transmission band is monitored, and transmission band allocation control for the transmission signal is executed based on the monitoring result, priority, and transmission purpose. That is, the control of the bandwidth of each of the first and second transmission bands can be efficiently performed in cooperation between the transmission side and the reception side without requiring manual operation.

  Therefore, it is possible to perform transmission band allocation processing of transmission signals appropriately according to the usage status of the first and second transmission bands of the satellite line, the priority order of the transmission signals, and the transmission purpose. The effective utilization rate of the transmission band can be increased.

  As described above in detail, according to the present invention, it is possible to automatically perform any transmission of a large capacity / short time, a small capacity / long time, etc. according to the availability of the satellite line, and effectively use the satellite line. It is possible to provide a transmission system capable of improving the rate, a transmission device thereof, and a reception device thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an embodiment of a transmission system according to the present invention, where TS indicates a master station and RS1 and RS2 indicate slave stations.

  First, the master station TS inputs broadcast material data output from a broadcast material transmission processing unit (not shown) to the encoding circuit 11. The encoding circuit 11 encodes the input broadcast material data and outputs the encoded data to the modulation circuit 12. The modulation circuit 12 modulates the input encoded data by a predetermined modulation method, and supplies the modulated signal to the transmission / reception unit (T / R) 14 via the synthesizer / distributor 13.

  The transmission / reception unit 14 frequency-converts the modulated signal and then amplifies the modulated signal to a predetermined transmission power level, and transmits the amplified broadcast signal from the antenna 15 to the satellite SAT via the satellite line.

  Further, the transmission / reception unit 14 receives a broadcast signal arriving from the satellite SAT, and supplies the received signal to the demodulation circuit 16 via the synthesizer / distributor 13. The demodulation circuit 16 digitally demodulates the received signal and outputs baseband encoded data to the decoding circuit 17. The decoding circuit 17 decodes the input encoded data and returns it to the original broadcast material data.

  In addition, the master station TS is provided with a data transmission adapter 18 constituting a data transmission device of the communication line section and modems 191 to 19n. The data transmission adapter 18 is connected to a telephone TEL1 and server devices SV1, SV2, SV3 via a router RT1 and a LAN. Data generated from the telephone TEL and the server devices SV1, SV2, SV3 is stored in the data transmission adapter 18 via the router RT1.

  The data transmission adapter 18 outputs the accumulated information to the synthesizer / distributor 13 via the modems 191 to 19n, and generates a data signal using the communication line.

  The combiner / distributor 13 combines the broadcast signal output from the modulation circuit 12 with the data signal using the communication line. The synthesized signal is transmitted by the transmitter / receiver 14.

  Further, the master station TS is provided with a modem 20, a transmission band controller 21 and a monitoring unit 22 that constitute control means. The modem 20 receives a transmission request transmitted from the slave stations RS1 and RS2 via a monitoring / control line provided in the satellite line, and outputs the transmission request to the transmission band controller 21.

  The monitoring unit 22 monitors the use status of a satellite video line and a line other than the video line via the modem 20.

  The transmission band controller 21 controls the transmission band composed of video lines and the transmission band composed of lines other than the connection line and the video line based on the transmission request and the monitoring result by the monitoring unit 22 to control the broadcast signal. The modulation line modems of the slave stations RS1 and RS2 are controlled so as to allocate the transmission band. At this time, the encoding circuit 11, the modulation circuit 12, and the modems 191 to 19n are controlled, and the control information necessary for the control is transmitted to each of the slave stations RS1 and RS2 via the monitoring / control line.

  On the other hand, the slave station RS1 is configured as follows. That is, a broadcast signal transmitted from the master station TS through the satellite line is received by the transmission / reception unit 32 via the antenna 31, and then input to the demodulation circuit 34 via the synthesizer / distributor 33, where a predetermined demodulation method is used. And the decoding circuit 35 performs a predetermined decoding process. This decoded data is supplied to the production facility 36.

  The data signal using the communication line transmitted from the master station TS is received by the antenna 31 and the transmission / reception unit 32, and then the control unit via the synthesizer / distributor 33, the modem 37, the data transmission adapter 38, and the router RT2. 39 is output. In addition, analysis data from the production facility 36 is supplied to the control unit 39 via the server device SV4.

  The control unit 39 generates a transmission request including the transmission signal priority and the transmission purpose as necessary, and transmits this transmission request to the satellite line monitoring / control line via the router RT2, the data transmission adapter 38, and the modem 37. To do. The control information from the master station TS is received via the modem 37, the data transmission adapter 38 and the router RT2, and the demodulation circuit 34, the decoding circuit 35 and the modem 37 are controlled according to this control information.

  The slave station RS1 includes an encoding circuit 40 and a modulation circuit 41, like the master station TS. That is, the broadcast material data produced by the production facility 36 is input to the encoding circuit 40. The encoding circuit 40 encodes the input broadcast material data and outputs the encoded data to the modulation circuit 41. The modulation circuit 41 modulates the input encoded data by a predetermined modulation method, and supplies the modulated signal to the transmission / reception unit 32 via the synthesizer / distributor 33.

  Then, the transmission / reception unit 32 frequency-converts the modulated signal and then amplifies the modulated signal to a predetermined transmission power level, and transmits the amplified broadcast signal from the antenna 31 to the satellite SAT via a predetermined video line.

  Further, the functional configuration of the slave station RS2 is the same as that of the slave station RS1, and the description thereof is omitted.

  Next, the operation of the transmission system configured as described above will be described with reference to FIGS. 2 and 3 are diagrams showing the frequency arrangement in the satellite line.

  Usually, as shown in FIG. 2, in a satellite line, a band made up of a plurality of video lines and a band made up of a plurality of connection lines are arranged on the frequency axis, and the respective bandwidths are fixed. In this case, if the frequency of use of the video line is high, there is a possibility that all the video lines are filled, and video / audio cannot be transmitted from the master station TS to each of the slave stations RS1, RS2.

  Therefore, in this embodiment, a monitoring / control line for monitoring / controlling transmission requests from the slave stations RS1 and RS2 in the master station TS is provided in the satellite line, so that transmission requests from the slave stations RS1 and RS2 are always sent. Monitor and manage line usage. Here, as shown in FIG. 3, the video lines for two lines are fixed, and the rest is set as a variable bandwidth control area. The variable bandwidth control area is an area that can be arbitrarily changed according to the usage status of the video line (hereinafter referred to as the first variable area), and is arbitrarily selected according to the size of the area, the size of the transmission signal, and the priority order. It can be divided into regions that can be varied (hereinafter referred to as second variable regions). A monitoring / control line is assigned to the communication line.

  The master station TS executes the control processing example shown in FIG.

  First, when the master station TS receives a transmission request coming from the slave stations RS1 and RS2 by the modem 20 (step ST4a), the master station TS determines whether or not the transmission signal is a video from the transmission request (step ST4b).

Here, if it is a video signal (Yes), the master station TS determines whether or not there are two video lines available by the monitoring unit 22 (step ST4c), and two video lines are available. If there is no (No), the transmission band controller 21 generates control information for assigning the video line to the first variable area, and transmits this control information to the slave stations RS1 and RS2 via the monitoring / control line. (Step ST4d)
On the other hand, if it is audio or data other than video in step ST4b (No), the master station RS determines whether or not there is a vacancy in the second variable area by the monitoring unit 22 (step ST4e). If not (No), the transmission band controller 21 generates control information for expanding the second variable area, and transmits this control information to the slave stations RS1 and RS2 via the monitoring / control line (step ST4f). ).

  In step ST4c and step ST4e, when there is a vacant line (Yes), the master station TS ends the process.

  Therefore, it is possible to automatically perform arbitrary transmission such as large capacity / short time, small capacity / long time, depending on the availability of the satellite line.

  As described above, in the above-described embodiment, using the monitoring / control line provided in the satellite line, the slave stations RS1 and RS2 notify the master station TS of the transmission request including the transmission signal priority and the transmission purpose, The station TS monitors the line availability of the satellite line, controls the encoding circuit 11, the modulation circuit 12, and the modems 191 to 19n based on the monitoring result, the priority order, and the transmission purpose, and the first variable of the satellite line. Control information for variably setting the area and the second variable area is generated, the control information is notified to the slave stations RS1 and RS2 via the monitoring / control line, and transmission band allocation control for the transmission signal is executed. I have to. That is, the control of the bandwidth of each of the first and second variable areas of the satellite line can be efficiently executed in cooperation with the master station TS and the slave stations RS1 and RS2 without requiring manual operation.

  Therefore, it is possible to perform transmission band allocation processing of appropriate transmission signals according to the availability of the satellite lines, the priority of transmission signals and the purpose of transmission, and thereby the effective utilization rate of limited transmission bands on the satellite lines Can be increased.

  In the above embodiment, the case of two slave stations RS1 and RS2 has been described. However, the present invention can be similarly applied to a case where a larger number of slave stations are provided.

  In addition, the configuration of the master station and the slave station, the variable control method of the transmission bandwidth of the satellite line, the transmission bandwidth allocation method for the transmission signal, the type of the transmission signal, and the like can be variously modified without departing from the gist of the present invention. Can be implemented.

1 is a schematic configuration diagram showing an embodiment of a transmission system according to the present invention. The figure which shows the frequency arrangement | positioning of the video line and communication line previously allocated to the satellite line. The figure which shows the frequency arrangement | positioning of lines other than the video line allocated to the satellite line in this embodiment, lines other than a video line, and a connection line. The flowchart which shows the control processing procedure of the master station in this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11,40 ... Coding circuit, 12, 41 ... Modulation circuit, 13, 33 ... Synthesizer / distributor, 14, 32 ... Transmission / reception unit, 15, 31 ... Antenna, 16, 34 ... Demodulation circuit, 17, 35 ... Decoding circuit , 18, 38 ... Data transmission adapter, 191-19n, 20, 37 ... Modem, 21 ... Transmission band controller, 22 ... Monitoring unit, 36 ... Production equipment, 39 ... Control unit, TS ... Master station, RS1, RS2 ... Child Station, SAT ... Satellite, RT1, RT2 ... Router, TEL1, TEL2 ... Telephone, SV1, SV2, SV3, SV4 ... Server device.

Claims (4)

A transmission signal is transmitted to a satellite line including a first transmission band for signal transmission to which a highest priority is assigned and a second transmission band for signal transmission other than the highest priority, on the transmission side, and In a transmission system that receives a transmission signal from a satellite line,
The sender side
Monitoring means for monitoring usage of the first and second transmission bands of the satellite line;
A request receiving means for receiving a transmission request sent from the receiving side via a monitoring / control line provided in the satellite line and including a priority order and a transmission purpose of the transmission signal;
Control means for controlling the bandwidth of each of the first and second transmission bands based on the transmission request obtained by the request receiving means and the monitoring result of the monitoring means and executing transmission band allocation control for the transmission signal And
The receiving side
A transmission system comprising request transmission means for transmitting the transmission request to the transmission side via a monitoring / control line of the satellite line. When the first transmission band comprises a plurality of video lines,
The transmission system according to claim 1, wherein the monitoring unit monitors the availability of the plurality of video lines. A transmission signal is transmitted to a satellite line including a first transmission band for signal transmission to which a highest priority is assigned and a second transmission band for signal transmission other than the highest priority, on the transmission side, and In a transmission device used as the transmission side in a transmission system that receives a transmission signal from a satellite line,
Monitoring means for monitoring usage of the first and second transmission bands of the satellite line;
A request receiving means for receiving a transmission request sent from the receiving side via a monitoring / control line provided in the satellite line and including a priority order and a transmission purpose of the transmission signal;
Control means for controlling the bandwidth of each of the first and second transmission bands based on the transmission request obtained by the request receiving means and the monitoring result of the monitoring means and executing transmission band allocation control for the transmission signal And a transmission apparatus for a transmission system. A transmission signal is transmitted to a satellite line including a first transmission band for signal transmission to which a highest priority is assigned and a second transmission band for signal transmission other than the highest priority, on the transmission side, and In a receiving apparatus used as the receiving side in a transmission system for receiving a transmission signal from a satellite line,
A receiving apparatus of a transmission system, comprising request transmitting means for transmitting a transmission request including a priority order of transmission signals and a transmission purpose to the transmitting side via a monitoring / control line provided in the satellite line.

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