JP2019092048A - Display control device and display control method - Google Patents

Abstract

To easily check whether signals transmitted from a mobile broadcast station use correct frequency bands.SOLUTION: According to an embodiment, a display control device comprises: a frequency spectrum display control unit that displays, from a monitor screen, frequency spectra of signals transmitted from a mobile broadcast station; and a frequency band display control unit that displays, from the monitor screen, a plurality of frequency bands allocated in advance such that the frequency bands can be identified from each other.SELECTED DRAWING: Figure 2

Description

  Embodiments of the present invention relate to a display control apparatus and a display control method for displaying the frequency spectrum of each signal transmitted from a mobile broadcast station from a monitor screen.

  In recent years, in the television industry, SNG (Satellite News Gathering) systems for transmitting and relaying news material via communication satellites are widely used from mobile broadcasting stations in the field.

  Communications using communication satellites are designed to send information such as video and audio directly from the mobile broadcast station to the communication satellite and send it to a fixed broadcast station such as the broadcaster's main office via the communication satellite. . For this reason, it is not necessary to intentionally provide a relay point for the relay.

  The communication satellite has a high elevation angle (elevation) from the ground, and the antenna for accessing the communication satellite has sharp directivity and high gain, so if there is no obstacle, point the antenna to the communication satellite, It is easy to access transponders mounted on the communication satellite.

Unexamined-Japanese-Patent No. 1-254010

  However, the number of transponders that can be mounted on a communication satellite is limited, and the number of lines that can be used for SNG is small. In addition, since the launch of communication satellites and the maintenance and management, etc. are very expensive and the broadcasters who use them will be forced to bear a considerable economic burden as the line usage fee, one company will independently carry out the line. It is not realistic to use for a long time.

  Therefore, a control center is provided for each broadcaster to share the transponder efficiently and the operation of the transponder is centrally managed.

  Accordingly, when transmitting a TV carrier signal from the mobile station, it is required to comply with the use of the frequency band (also referred to as "channel") allocated by the control center.

  However, in recent years, the number of channels used by television stations has been steadily increasing, and the margin of the frequency to be allocated is decreasing, so the polarization system (H polarization, V polarization) is changed for the same frequency. It is required to devise to use it by

  Under these circumstances, the use of a frequency slightly deviated from the assigned frequency may cause interference with other TV broadcasts, resulting in serious situations such as interference.

  For this reason, at the main station of each broadcaster, in order to confirm that the frequency used by each mobile broadcast station owned is using the frequency as assigned, each spectrum broadcaster uses each spectrum analyzer to The TV carrier signal transmitted from the mobile station is confirmed.

  However, in recent years, with the progress of transmission technology, the roll-off of the TV carrier is also decreasing, and the waveform of the TV carrier signal approaches a rectangular wave. For this reason, it is difficult to understand the boundaries between adjacent TV carrier signals in the frequency band.

  As described above, it is becoming less easy to check whether a mobile station is using the allocated frequency band correctly.

  The problem to be solved by the present invention is to provide a display control device and a display control method capable of easily confirming whether or not a signal transmitted from a mobile station uses the correct frequency band. is there.

  In order to achieve the above object, the present invention takes the following measures.

  The display control apparatus according to the embodiment can distinguish between the frequency spectrum display control unit for displaying the frequency spectrum of each signal transmitted from the mobile broadcasting station from the monitor screen, and a plurality of frequency bands assigned in advance. And a frequency band display control unit for displaying on the monitor screen.

It is a functional block diagram showing an example of composition of a system by which a display control device of an embodiment of the present invention is applied. It is a block diagram showing an example of composition of a display control device of this embodiment. It is an allocation table for TV carrier signals which shows an example of allocation information. It is an allocation table for order wire signals which shows an example of allocation information. It is a schematic diagram which shows the example of a display on the monitor screen for displaying a TV carrier signal. It is a schematic diagram which shows the example of a display on the monitor screen for displaying an order wire signal. It is a schematic diagram which shows the example of a display of the monitor screen on which the frequency spectrum of the TV carrier signal was displayed. It is a schematic diagram which shows the example of a display of the monitor screen where the frequency spectrum of the order wire signal was displayed. It is a flowchart which shows the operation example of the display control apparatus of embodiment of this invention. It is a schematic diagram which shows the example of a display of the monitor screen on which the frequency spectrum of the order wire signal was displayed (example displayed without distinguishing a frequency zone).

  Hereinafter, a display control apparatus to which a display control method according to an embodiment of the present invention is applied will be described with reference to the drawings.

  FIG. 1 is a functional block diagram showing a configuration example of a system to which a display control apparatus according to an embodiment of the present invention is applied.

  One or more mobile stations 8 transmit signals towards the system 10 via the communication satellites 9.

  The frequency bandwidth of this signal is 12 GHz, for example, and includes not only the TV carrier signal but also the order wire signal.

  The order wire signal is a voice communication line whose frequency bandwidth is much narrower than that of the TV carrier signal and which is constructed other than the TV carrier signal. When voice communication is made between the mobile station 8 and the main office of the broadcaster, an orderwire signal is used.

  The system 10 is provided in a fixed broadcasting station such as a broadcasting company's main station, and receives a signal from the communication satellite 9 at an antenna 12.

  The antenna 12 outputs this signal to the receiver 14.

  The signal received by the receiver 14 is output to the frequency divider 16 after being subjected to polarization (for example, V polarization or H polarization) processing as necessary.

  The frequency divider 16 frequency-divides this signal so as to divide, for example, 12 GHz into 1 GHz to extract a TV carrier signal of a frequency band of one channel from the signal output from the receiver 14. Then, the signal extracted by this frequency division is output to the spectrum analyzer 18 and the order wire modem 19.

  The spectrum analyzer 18 performs spectrum analysis on the signal output from the frequency divider 16, and outputs the spectrum analyzed TV carrier signal a, which is the analysis result, to the display control device 20. The number of spectrum analyzers 18 is not limited to one, and a plurality of spectrum analyzers 18 may be provided. If a plurality of TV carrier signals are provided, TV carrier signals of frequency bands of a plurality of channels can be spectrum analyzed simultaneously.

  The order wire modem 19 extracts the order wire signal b from the signal output from the frequency divider 16 and outputs the order wire signal b to the display control device 20.

  FIG. 2 is a block diagram showing a configuration example of the display control device 20 of the present embodiment.

  The display control device 20 includes an input / output interface unit 30, a control unit 40, and a storage unit 50.

  The input / output interface unit 30 receives the TV carrier signal a output from the spectrum analyzer 18 and the order wire signal b output from the order wire modem 19, and outputs the signal to the control unit 40. In addition, instruction information c from the user made via the user interface (UI) 72 is output to the control unit 40. Further, display instruction information d or display instruction information e output from control unit 40, and display instruction information f1 and display instruction information f2 are received and output to monitor screen 70.

  The storage unit 50 uses, as a storage medium, a non-volatile memory such as a solid state drive (SSD) or a hard disk drive (HDD) that can be written and read as needed, and is used to implement this embodiment. The frequency allocation information storage unit 52 is provided as a storage area to be selected.

  The control unit 40 has a CPU (Central Processing Unit) and a program memory that constitute a computer, and has a frequency spectrum display control unit 42 and a frequency band display control unit 44 as control functions required to implement this embodiment. Have. Note that these control functions are all realized by causing the CPU to execute the program stored in the program memory.

  The frequency spectrum display control unit 42 generates display instruction information d for displaying the TV carrier signal a output from the input / output interface unit 30 from the monitor screen 70. Further, display instruction information e for displaying the order wire signal b output from the input / output interface unit 30 from the monitor screen 70 is generated. Then, according to the instruction information c outputted from the input / output interface unit 30, either the display instruction information d or the display instruction information e is outputted to the input / output interface unit 30. For example, if the instruction information c is an instruction to display the TV carrier signal a, the display instruction information d to the input / output interface unit 30 if the instruction to display the order wire signal b is displayed. Output.

  The frequency assignment information storage unit 52 stores assignment information g related to the assigned frequency band.

  FIG. 3 and FIG. 4 are an allocation table g1 and an allocation table g2 showing an example of the allocation information g.

  The assignment table g1 is an example of the assignment information g for the TV carrier signal a, and the assignment table g2 is an example of the assignment information g for the order wire signal b. In these allocation tables g1 and g2, from the monitor screen 70, color patterns for displaying each frequency band (channel) are defined.

  For example, in the assignment table g1, the channel 1 is defined to display a frequency band with a width of ± 2.72 MHz around the center frequency 1036.825 MHz in purple.

  Although the allocation tables g1 and g2 are defined to display in different colors for each channel, the present invention is not limited to such display patterns, and at least adjacent channels are different colors. It may be defined to be displayed. In this case, at least two colors are used for display. Also, adjacent channels may be defined to be displayed with different contrasts. Alternatively, it may be defined to display adjacent channels alternately in black and white inversion.

  The frequency band display control unit 44 creates the display instruction information f1 for the TV carrier signal a as specified by the allocation table g1 stored in the frequency allocation information storage unit 52. Further, as designated by the assignment table g2 stored in the frequency assignment information storage unit 52, the display instruction information f2 for the order wire signal b is created. Then, the display instruction information f1 and f2 are output to the input / output interface 30.

  In response to this, the input / output interface 30 outputs the display instruction information f1, f2 to the monitor screen 70. Thereby, as shown in FIGS. 5 and 6, each channel is color-coded and displayed for each designated frequency band from the monitor screen 70 according to the definition made by the allocation table g1 and the allocation table g2. become. 5 and 6 show a state in which no signal waveform is displayed yet, and FIG. 5 is a schematic view showing a display example on the monitor screen 70 for displaying the TV carrier signal a. FIG. 6 is a schematic view showing a display example on the monitor screen 70 for displaying the order wire signal b. Each of these shows the signal strength on the vertical axis and the frequency on the horizontal axis.

  Further, the input / output interface unit 30 outputs the display instruction information d, e output from the frequency spectrum display control unit 42 to the monitor screen 70.

  When the display instruction information d is output, the monitor screen 70 displays the frequency spectrum of the TV carrier signal a on the graph shown in FIG. 5 according to the display instruction information d.

  FIG. 7 is a schematic view showing a display example of the monitor screen 70 on which the frequency spectrum of the TV carrier signal a is displayed.

  In addition to the frequency spectrum of the TV carrier signal a, additional information H such as a channel number, a station name, a transmission mode and a margin may be displayed on the monitor screen 70 as appropriate.

  In order to display the additional information H, for example, before the mobile broadcasting station 8 transmits a signal, additional information such as a source station name for each frequency band, a transmission mode, a margin, and the like is previously included in the order wire signal b. Include. Then, by transmitting such a signal from the mobile broadcast station 8 to the system 10, the frequency spectrum display control unit 42 acquires additional information from the order wire signal b and causes the monitor screen 70 to display the additional information.

  In FIG. 7, the waveform seen on the lower frequency side than channel 1 is a set of order wire signals b. As described above, the order wire signal b has a much narrower frequency bandwidth than the TV carrier signal a. Therefore, the display control device 20 outputs the display instruction information e to the monitor screen 70 in order to finely display the frequency spectrum of the order wire signal b.

  The monitor screen 70 displays the frequency spectrum of the order wire signal b as shown in FIG. 8 on the graph in which the horizontal axis range of FIG. 5 is expanded as shown in FIG. 6 according to the display instruction information e.

  FIG. 8 is a schematic view showing a display example of a monitor screen on which the frequency spectrum of the order wire signal b is displayed.

  In the example shown in FIG. 8, it is shown that the frequency spectrum of the order wire signal b is included in the frequency band colored and displayed for each channel. Note that the two pulses present in each channel are those from uplink and downlink voice communication. As it is possible to visually recognize that there are no pulses across different colors, it is easily ascertained that the assigned frequency band is correctly used for the transmission of the order wire signal b.

  Allocation of frequency bands for the order wire signal b is entrusted to each broadcaster. For this reason, as shown in the example of FIG. 8, the frequency bands are discontinuous such that they are not necessarily assigned in the order of channel numbers, or there is an unused frequency band between channel 1 and channel 4, for example. It may be used for

  Next, the operation of the display control device 20 according to the present embodiment configured as described above will be described.

  For example, in the system 10 provided in a fixed broadcasting station such as the broadcasting company's main station, in order to confirm that the signal transmitted from the mobile broadcasting station 8 uses the assigned correct frequency band, Alternatively, signals transmitted from a plurality of mobile stations 8 are received by the antenna 12 via the communication satellite 9.

  This signal is output from the antenna 12 to the receiver 14, subjected to polarization (for example, V polarization or H polarization) processing as necessary, and then output to the frequency divider 16, and frequency division as necessary. After that, it is output to the spectrum analyzer 18 and the order wire modem 19.

  The spectrum analyzer 18 performs spectrum analysis on the signal output from the frequency divider 16, and the spectrum analysis TV carrier signal a which is the analysis result is output to the display controller 20.

  In the order wire modem 19, the order wire signal b is extracted from the signal output from the frequency divider 16 and is output to the display control device 20.

  FIG. 9 is a flowchart showing an operation example of the display control device 20 according to the embodiment of this invention.

  The TV carrier signal a output by the spectrum analyzer 18 and the order wire signal b output by the order wire modem 19 are received by the frequency spectrum display control unit 42 via the input / output interface unit 30 (S1).

  The frequency spectrum display control unit 42 generates display instruction information d for displaying the TV carrier signal a output from the input / output interface unit 30 from the monitor screen 70. Further, display instruction information e for displaying the order wire signal b output from the input / output interface unit 30 from the monitor screen 70 is generated (S2).

  Next, the user performs an input for instructing to display the TV carrier signal a or the order wire signal b from the monitor screen 70 from the user interface (UI) 72. In response to this input, the instruction information c is generated by the user interface (UI) 72, and is output to the frequency spectrum display control unit 42 via the input / output interface unit 30 (S3).

  In the frequency spectrum display control unit 42, the display instruction information d is an instruction to display the TV carrier signal a, and the display instruction information e is an instruction to display the order wire signal b. It is output to the monitor screen 70 via the input / output interface unit 30 (S4).

  In the monitor screen 70, when the display instruction information d is output, the frequency spectrum of the TV carrier signal a is displayed. On the other hand, when the display instruction information e is output, the frequency spectrum of the order wire signal b is displayed (S5).

  In step S6, when repeating step S4 and step S5, it moves to step S4, and when it is not necessary to repeat, the processing is ended. By this repetition, for example, it is instructed to display the TV carrier signal a in step S4, and even if the frequency spectrum of the TV carrier signal a is displayed in step S5, in the next time, the order wire signal in step S4. The user is instructed to display b, and the frequency spectrum of the order wire signal b is displayed in step S5.

  Note that, independently of the above steps, in the frequency band display control unit 44, as designated by the assignment table g1 stored in the frequency assignment information storage unit 52, display instruction information f1 for the TV carrier signal a. Has been created. Further, as designated by the assignment table g2 stored in the frequency assignment information storage unit 52, display instruction information f2 for the order wire signal b is also created in advance. The display instruction information f1 and f2 are output to the monitor screen 70 via the input / output interface 30.

  As a result, from the monitor screen 70, each channel is color-coded and displayed for each designated frequency band according to the definition made by the assignment table g1 and the assignment table g2.

  A display example in which the frequency spectrum of the TV carrier signal a is displayed from the monitor screen 70 is shown in FIG. According to this example, since there is no rise of a pulse from channel 1 to channel 4, it can be seen that channel 1 to channel 4 are not used by any mobile broadcast station 8. On the other hand, in channels 5 and 6, since the pulse is rising, it is understood that it is used.

  Further, in FIG. 7, the rising of the pulse is observed at the start of channel 5, the valley of the pulse is observed at the boundary between channel 5 and channel 6, and the falling of the pulse is observed at the end of channel 6. This shows that the frequency of channel 5 and the frequency of channel 6 are correctly used without disturbing the adjacent channels. If a pulse is observed that crosses the boundaries of adjacent channels, it can be seen that the frequency is not being used correctly.

  Further, FIG. 8 shows an example in which the frequency spectrum of the order wire signal b is displayed from the monitor screen 70. Also in FIG. 8, the frequency bands to which each channel belongs are displayed in different colors.

  In FIG. 8, the order wire signal b is also assigned the correct frequency band because no pulse crossing the boundary of the adjacent channel is observed and no pulse is seen in the unused frequency band where the channel number is not displayed. You can see that you are using

  As described above, the assignment to the frequency band for the order wire signal b is entrusted to each broadcaster, and as shown in the example of FIG. The frequency band may be used discontinuously, as there is an unused frequency band between the channel 4 and the channel 4. Therefore, as shown in FIG. 10, if only a screen that does not identify each channel is displayed, it is extremely useful for the operator to check which waveform belongs to which channel one by one while looking at the screen as shown in FIG. Not only is it a bothersome task, it also increases the possibility of misjudgment.

  However, according to the present embodiment, as shown in FIGS. 7 and 8, the channels are color-coded and identifiably displayed, so that the frequency band is irregular as in the order wire signal b as shown in FIG. 8, for example. And, even for a signal that is allocated in a complicated manner, it can be easily determined whether or not the correct frequency band is used.

  As described above, according to the display control device 20 to which the display control method of the present embodiment is applied, it is possible to easily confirm that the correct frequency band is used by the above-described operation. .

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and the equivalents thereof as well as included in the scope and the gist of the invention.

8 mobile stations, 9 communication satellites, 10 systems, 12 antennas, 14 receivers,
16 frequency dividers, 18 spectrum analyzers, 19 order wire modems,
20 display controller, 30 input / output interface, 40 control units,
42 frequency spectrum display control unit, 44 frequency band display control unit,
50 storage units, 52 frequency allocation information storage units, 70 monitor screens,
72 User Interface.

Claims (5)

A frequency spectrum display control unit for displaying the frequency spectrum of each signal transmitted from the mobile station from the monitor screen;
A frequency band display control unit for displaying a plurality of frequency bands assigned in advance from the monitor screen so as to be mutually distinguishable;
A display control apparatus comprising:   The display control device according to claim 1, wherein the frequency band display control unit causes each of the plurality of frequency bands to be displayed on the monitor screen in a color or contrast different from that of an adjacent frequency band.   The display control device according to claim 1, wherein each of the signals includes at least one of a TV carrier signal and an order wire signal.   The frequency spectrum display control unit determines additional information according to a frequency spectrum belonging to each frequency band based on the information added to the order wire signal, and displays the additional information from the monitor screen. The display control device according to 3. A display control method implemented by a processor, comprising:
The processor causes the monitor screen to display the frequency spectrum of each signal transmitted from the mobile station;
A display control method, wherein the processor displays a plurality of pre-allocated frequency bands from the monitor screen so as to be distinguishable from each other.