JP4927909B2 - Transmission state display method and apparatus - Google Patents

Description

  The present invention relates to an information transmission system including at least a mobile unit such as a relay vehicle and another device such as a base station that receives transmission information that is information wirelessly transmitted from the mobile unit, and transmission of transmission information from the mobile unit The present invention relates to a transmission state display method and apparatus for confirming the situation, performing a preliminary confirmation test and plan of the transmission procedure, and providing support during actual operation.

  In general, as an information transmission system for transmitting information such as a video signal for a marathon relay or a relay station relay, an image pickup camera is used for a relay vehicle equipped with an FPU (field pickup unit) device for video signal transmission. The captured video signal is transmitted by an FPU device from a relay vehicle to a base station installed at the top of a mountain, for example, with an 800 MHz OFDM (Orthogonal Frequency Division Multiplex) modulation method radio wave and a transmission signal of the video signal or the like. (For example, refer to Patent Document 1).

JP 2002-94481 A (pages 6 to 7, FIG. 20)

  Since the above-described conventional technique is a transmission system using radio waves, it is necessary to enable wireless transmission in an optimal transmission state according to the position of a moving relay vehicle. Furthermore, it is necessary to enable wireless transmission in an optimum transmission state according to the moving state of the moving relay vehicle, for example, the moving speed and moving direction of the relay vehicle.

  Therefore, for example, from among a plurality of base stations, a base station whose transmission status is optimal is confirmed and selected in advance according to the position of the relay vehicle or movement status, and wireless radio waves are efficiently transmitted to the selected base station. Try to transmit information. Alternatively, according to the position of the relay vehicle and the movement situation, the course range that is not to be transmitted is confirmed in advance, and when there is a relay vehicle in the confirmed range, transmission of radio wave transmission information is not performed. Like that. Alternatively, it is necessary to check in advance the characteristics of the moving body on the moving path in accordance with the position of the relay vehicle or the moving situation, and record the confirmed characteristics on, for example, a paper medium. However, in the past, such confirmation work often relied on manpower, and it was a troublesome work.

  An object of the present invention is to provide a transmission status display method and apparatus capable of recording information related to the operation of an information transmission system and providing support for simplifying the operation work.

  In order to solve the above-described problem, the present invention wirelessly transmits a video signal obtained by imaging with an imaging apparatus included in a mobile body from the mobile body, receives the wirelessly transmitted video signal, and Position information indicating the position of the moving body and movement state information indicating the moving state of the moving body are generated, and the received electric field level, bit error rate (BER), delay wave level and transmission related to the received video signal are generated. A transmission status display method comprising: generating at least one transmission status information among format errors, and recording the generated transmission status information in association with the position information and movement status information. By doing so, it is possible to display a plot line that distinguishes whether or not the transmission state is good based on the recorded information on a map display including the moving position of the moving body.

  In addition, the present invention receives transmission information wirelessly transmitted from a moving body moving on a course, and based on the received transmission information, a received electric field level, a bit error rate (BER), a transmission format error, and a delay wave At least one transmission state information among the levels is acquired every predetermined time, and whether or not the transmission state of the transmission information is good according to the acquired value of the transmission state information for each predetermined time acquired. It is a transmission state display method characterized by displaying the distinguished plot line in association with the position of the moving body on the map along the course on the map.

  The present invention receives transmission information wirelessly transmitted from a moving body moving on a course, and based on the received transmission information, a distance value, a received electric field level, and a bit error rate (BER) that the moving body moves. , Acquiring at least one transmission state information among transmission format error and delay wave level every predetermined time, and converting the acquired distance value into latitude and longitude information to generate position information of the moving body on the map And determining whether the transmission state of the transmission information is good or not according to the acquired value of the transmission state information every predetermined time, and generating a plot line that distinguishes whether the transmission information is good or not. It is a transmission state display method characterized by displaying plot lines that discriminate whether or not the image is good at predetermined intervals while moving body position information along the course on a map.

  In the present invention, the acquired transmission state information is displayed with a plot line that distinguishes whether or not the transmission state is good by comparison with a set threshold value. .

  In the present invention, the acquired transmission state information is a plot line that distinguishes whether or not the transmission state is good by comparison with a threshold value set by an operation input on a display screen that displays the plot line. , A transmission state display method characterized by displaying.

  In the present invention, when the transmission status information is displayed with a plot line that distinguishes whether or not the transmission status of the transmission information is good by acquiring a plurality of data, if any of the data is not In addition, a transmission line display method is characterized in that a plot line indicating whether or not the transmission state of the transmission information is displayed is displayed.

  The present invention is a transmission state display method characterized by displaying a data list indicating data acquired at the predetermined time of the transmission state information.

  In the present invention, it is a transmission state display method characterized in that a plurality of the plot lines can be displayed side by side in accordance with the number of acquired transmission state information.

  The present invention is a transmission state display method characterized by displaying click point information indicating place information of a place where a marker is set by clicking on the map.

  The present invention is a transmission state display method characterized by displaying a straight line connecting a place where a marker is set by clicking on the map and a base station.

  In the present invention, the acquired transmission state information can be set and registered as an outward path or a return path according to a moving direction of a moving body moving on the course, and the plot line is displayed according to the setting registration. This is a characteristic transmission state display method.

  The present invention relates to a transmission status display characterized by switching and registering the setting of the forward path or the return path when the moving direction is changed to the opposite direction within a predetermined time according to the moving distance of the moving body. Is the method.

  The present invention receives transmission information wirelessly transmitted from a moving body moving on a course, acquires a distance value that the moving body has moved from the received transmission information, and uses the acquired distance value as latitude and longitude information. The position information of the moving body on the map is generated by conversion, the position marker indicating the current position of the moving body is displayed on the course, and when there are a plurality of moving bodies, the relative distance between them, and the moving body At least one of a distance from the current position to the predetermined position and an estimated arrival time from the current position to the predetermined position of the mobile object.

  The present invention is a transmission status display method characterized by designating a mark display position on the course and listing the point as a landmark.

  The present invention is the transmission state display method characterized in that, when there are a plurality of the moving bodies, the display of the map is switched according to the position information.

  The present invention is a transmission state display method for displaying a position mark indicating an estimated position of the mobile object after a predetermined time from the current position of the mobile object and the operation status of the mobile object.

  The present invention is the transmission state display method characterized in that when there are a plurality of the moving bodies and the position markers overlap, they are alternately overwritten and displayed.

  The present invention wirelessly transmits a video signal obtained by imaging with an imaging device included in a mobile body from the mobile body, receives the transmitted video signal, and indicates positional information indicating the position of the mobile body, and Movement status information representing the movement status of the moving object is generated, and at least one transmission state of the received electric field level, bit error rate (BER), delay wave level and transmission format error related to the received video signal is generated. A transmission status display device comprising: means for generating information; and means for recording the generated transmission status information in association with the position information and movement status information. By doing so, it further comprises means for displaying on the map display including the moving position of the moving body a plot line that distinguishes whether or not the transmission state is good based on the recorded information. The status can be displayed more easily.

  The present invention receives transmission information wirelessly transmitted from a moving body moving on a course, and receives the received electric field level, bit error rate (BER), transmission format error, and delay wave level from the received transmission information. Whether or not the transmission state of the transmission information is good according to the acquisition means for acquiring at least one transmission state information every predetermined time and the acquired value of the transmission state information for each predetermined time acquired A transmission state display device comprising: a generation unit that generates a plot line that distinguishes between the first and second lines; and a display unit that displays the plot line in association with the position of the moving object on the map along the course on the map. is there.

  The present invention receives transmission information wirelessly transmitted from a moving body moving on a course, and based on the received transmission information, a distance value, a received electric field level, and a bit error rate (BER) that the moving body moves. , Acquisition means for acquiring at least one transmission state information among transmission format errors and delay wave levels at predetermined time intervals, and the obtained distance value is converted into latitude and longitude information, and the position information of the mobile body on the map And determines whether the transmission state of the transmission information is good by determining whether the transmission state of the transmission information is good or not according to the acquired value of the transmission state information for each predetermined time. A generating means for generating the plotted lines, and a table for displaying the plotted lines at a predetermined interval while distinguishing the good or bad while moving the position information of the moving body along the course on the map. A transmission status display device characterized by comprising a means.

  The present invention further comprises threshold value input means, and the acquired transmission status information indicates whether or not the transmission status is good by comparison with a threshold value input and set by the threshold value input means. The transmission state display device is characterized in that the display is performed with the distinguished plot lines.

  The present invention comprises threshold value input means capable of operation input on a display screen of the display means for displaying the plot line, and the acquired transmission state information is obtained by the display means for displaying the plot line. The transmission status display device displays a plot line that distinguishes whether or not the transmission status is good by comparing with a threshold value set by an operation input.

  The present invention receives transmission information wirelessly transmitted from a moving body that moves on a course, acquires acquisition means for acquiring a distance value that the moving body has moved from the received transmission information, and obtains the acquired distance value as latitude. Generating means for converting to longitude information to generate position information of the moving body on the map, and displaying a position marker indicating the current position of the moving body on the course, and if there are a plurality of moving bodies, the relative between them And a display unit that displays at least one of a distance, a distance from the current position of the moving body to a predetermined position, and an estimated arrival time from the current position of the moving body to the predetermined position. Is a transmission state display device.

  According to the present invention, it is possible to obtain a transmission status display method and apparatus capable of providing support for simplifying the operation work by recording information related to the operation of the information transmission system.

It is a block diagram which shows the structure of embodiment of the transmission status display method and apparatus by this invention. It is a figure which shows the 1st example of the information display by this invention. It is a figure which shows the 2nd example of the information display by this invention. It is a figure which shows the 3rd example of the information display by this invention. It is a figure which shows the 4th example of the information display by this invention. It is a figure which shows the 5th example of the information display by this invention. It is a figure which shows the 6th example of the information display by this invention.

  Embodiments of a transmission status display method and apparatus according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an embodiment of a transmission status display method and apparatus according to the present invention. In FIG. 1, a mobile 10 and a base station 20 are shown as an information transmission system. The moving body 10 is a relay vehicle, for example, and moves (runs) along a road course. The base station 20 is a fixed station and is installed on a mountain, for example.

  The moving body 10 includes a distance meter 11 that measures a moving distance of the moving body, a GPS receiver 12 that measures a moving state such as the position and moving speed of the moving body, and an imaging camera 13 that outputs a video signal. The distance information measured by the distance meter 11 and the position information and movement status information measured by the GPS receiver 12 are input to the transmission unit 14 and transmitted to the base station 20 via the transmission antenna 15 as transmission signals. The

  The transmission unit 14 may modulate the transmission signal with an 800 MHz OFDM (Orthogonal Frequency Division Multiplexing) modulation method to generate a transmission signal.

  The base station 20 demodulates the received transmission signal into a video signal, distance information, position information, and movement status information, and transmits the received transmission signal from the reception state of the received transmission signal. A receiving unit 22 that acquires a received electric field level, a bit error rate (BER), a transmission format error, and a delayed wave level indicating state information at predetermined time intervals and a personal computer 23 are provided.

  The personal computer 23 includes a movement state output unit 24, a state determination unit 25, a state display control unit 26, and a display unit 27. The movement state output unit 24 inputs the demodulated distance information, and generates the position information of the moving body on the map, the distance information being position information including latitude and longitude information. The state determination unit 25 determines whether or not the transmission state of the transmission signal is good according to the transmission state information every predetermined time, and generates determination information that distinguishes whether or not the transmission signal is good. The state display control unit 26 records the position information generated by the movement state output unit 24 or records the demodulated position information and movement state information, and further records the determination information generated by the state determination unit 25. Whether or not the transmission state of the transmission information is good while moving the position information of the moving body along the course 101 on the map according to the recorded position information or the position information and the movement status information and the determination information. Data for displaying the plot lines 102 and 103 with the distinction is generated. Based on the generated data, the display unit 27 displays plot lines 102 and 103 that distinguish whether the transmission state of the transmission information is good or not.

  Further, the display unit 27 is provided with a threshold value input unit 104 for distinguishing whether the transmission state is good or not, and the set value input by operating the threshold value input unit 104 is input to the state determination unit 25. And used as a threshold for comparison when determining whether or not the transmission state of the transmission information is good.

  Next, a first example of information display on the display unit 27 in FIG. 1 will be described with reference to FIG. In FIG. 2, on the course 101 indicated by a white line, a plot line 102 represented by a solid line part in the case of NO (NG) and a plot line 103 represented by a white line part in the case of good (OK) are shown.

Here, a specific example will be described.
(1) Transmission status information No. to be acquired 1: Received electric field level (BL)
No. 2: Bit error rate (BER)
No. 3: Transmission format error (transmission NG)
No. 4: Delay wave level (DPF)
(2) Sampling specifications to be acquired Sampling is performed according to the following specifications, and detection is performed at 1 second intervals.
No. 1: Received electric field level (BL)
A / D conversion is performed every 62.5 mS, and the worst value in one second is used as sampling data.
No. 2: Bit error rate (BER)
The input of each bit error rate is taken at an interval of 62.5 mS, and the worst value in 1 second is used as sampling data.
No. 3: Transmission format error (transmission NG)
The transmission format error input is counted at an interval of 62.5 ms, and the total error value for 1 second is used as sampling data.
No. 4: Delay wave level (DPF)
The reflected wave is taken in as one of four levels according to the level, and the worst value in one second is used as sampling data.
(3) The set value, that is, the threshold value for the acquired data of the transmission state information is set by entering the threshold value at the threshold value input unit 104 displayed above the display map.
Each symbol in the threshold value input unit 104 will be described.
Reference numeral 1041: indicates that a determination is made based on an item with a black circle.
Reference numeral 1042: BL (received electric field level)
NG when the sampling data is less than this set value.
Reference numeral 1043: BER (bit error rate)
When sampling data is equal to or greater than this set value, it is determined as NG.
Reference numeral 1044: transmission NG
When sampling data is equal to or greater than this set value, it is determined as NG.
Reference numeral 1045: DPF (delay level):
When sampling data is equal to or greater than this set value, it is determined as NG.
Reference numeral 1046: When specified by a specified mathematical expression, a black circle is added.
Reference numeral 1047: An explanation of how to write an expression that is easy to use is displayed.
Reference numeral 1048: Displays the name of the registered (input setting) expression. A plurality of expressions can be registered (input setting).
Reference numeral 1049: Registers (sets) an expression being displayed.
Reference numeral 1050: Deletes the expression being displayed.
Reference numeral 1051: The registered (input set) expression is determined to be negative (NG) when the display sampling data satisfies the expression in this field.

  In accordance with the threshold value input and set by the threshold value input unit 104, the state determination unit 25 in FIG. 1 determines whether the transmission state of the transmission information is good (OK) or not (NG) at a predetermined interval. In this case, a determination is made every second, and based on the determination result, a plot line 102 represented by a solid line portion is output in the case of no (NG), and a plot line 103 represented by a white line portion is output in the case of good (OK). By inputting the data into the display unit 27, the plot lines 102 and 103 that distinguish whether or not the transmission state of the transmission information is good are displayed at predetermined intervals.

Here, among the data of the reception electric field level, the bit error rate (BER), the transmission format error, and the delay wave level indicating the transmission state information, there are black circles in a plurality of data, and when the determination is made with a plurality of data When at least one of the data is NO (NG), the plot line 102 represented by the solid line portion is output, and the NO (NG) is preferentially displayed.
(4) The data list window 105 is also displayed on the map display screen.
The data list window 105 includes data such as time, section number, moving distance, moving speed, moving direction, received electric field level value, bit error rate (BER) value, transmission format error value, and delayed wave level value. Is displayed every second.

Each code in the data list window 105 will be described.
Reference numeral 1051: indicates the color displayed on the map in the case of ◯ and the color determination result is OK.
Reference numeral 1052: indicates a color displayed on the map when the color determination result is NG.
Reference numeral 1053: The color / width can be changed in the color / width change environment setting.
Reference numeral 1054: Displayed only when it is desired to save or read the file name display file.
Reference numeral 1055: Open when it is desired to display or modify the display / correction acquisition information such as a memo at reception.
Reference numeral 1056: A base search base station is displayed in the center of the map.
Reference numeral 1057: Indicates that the received transmission information during recording is being acquired.
Reference numeral 1058 represents data acquired every second.
Double-click to display the data in the center of the map.
Reference numeral 1059: When the map is clicked, the distance from the base station to the click point is displayed.
Only when the location to the base station is specified in the acquisition information.

  Next, a second example of information display on the display unit 27 in FIG. 1 will be described with reference to FIG. In FIG. 3, a plurality of plot lines can be displayed side by side in accordance with a plurality of pieces of acquired information. FIG. 3 shows an example in which two plot lines 107 and 108 are displayed side by side. The plot lines 107 and 108 are not shown, but, as in FIG. 2, the plot line 102 represented on the course 101 indicated by the white line and represented by the solid line portion in the case of No (NG) is good (OK). And a plot line 103 represented by a white line portion in FIG. It should be noted that an interval (offset) when arranging the two lines and respective display colors can be set. In this case, the data list window 105 displays two pieces of acquired information in separate windows 105A and 105B.

  A click point information window 106 is also displayed on the map display screen. The click point information window 106 displays a rough address, latitude / longitude of the place where the marker is set by clicking on the map, and a straight line distance from the base station to the marker set place.

  Also, a straight line 109 connecting the marker setting location and the base station is displayed. In FIG. 3, the position of the base station is not displayed, but the direction can be immediately confirmed by the straight line 109. Further, the display color can be a color corresponding to the plot line display color. Also, the display width and display color of the course display can be set respectively.

  Next, a third example of information display on the display unit 27 of FIG. 1 will be described with reference to FIG. FIG. 4 shows a setting image display when the acquired information is set and registered as the forward path or the return path according to the moving direction of the moving body that moves according to the course. 4 shows a state in which the display window 110 is displayed. By selecting one of the forward path item 111 and the backward path item 112 in the display window 110, either the forward path or the backward path is set. be able to.

  Although not shown in the figure, the setting of the forward path or the return path is switched and registered according to the moving distance of the moving body or when the moving body changes the moving direction to the opposite direction within a predetermined time. You may do it.

  Next, a fourth example of information display on the display unit 27 in FIG. 1 will be described with reference to FIG. In FIG. 5, the state of displaying the position of the moving body and the distance information related to the position will be described. In FIG. 5, as the position marker 113 which shows the position of the three moving bodies from the 1st car of the moving body to the 3rd car of the moving body which moves along the course 101 which shows the 5th section which is a section where the moving body exists on the map display. A position marker 113-1 for the first car, a position marker 113-2 for the first car, and a position marker 113-3 for the third car are displayed. And according to each position marker, the section number and the travel distance in the section are displayed as the position of each moving body.

Next, a fifth example of information display on the display unit 27 in FIG. 1 will be described with reference to FIG. In FIG. 6, the moving body distance information 114 is shown. This moving object distance information 114 is displayed by selecting a moving object distance display item in the display window 110 of FIG. The distance between the three moving bodies and the relative distance between the moving bodies are displayed. In addition, the remaining distance to the section or the turning point is displayed (the display start distance of the remaining distance can be set).
In the display order, the top is the top (the one with the greater distance). Even when the car number and the order are switched, the display order is in order from the top. After the start of execution, only the number of channels (channels) actually received is displayed.

Each symbol in FIG. 6 will be described.
Reference numeral 1141: indicates a car number of the moving body.
Reference numeral 1142 (1142-1, 1142-2, 1142-3): Indicates a distance display of the moving object.
Reference numeral 1143 (1143-1, 1143-2, 1143-3): indicates a distance display to the next relay station or turn-around.
Reference numeral 1144 (1144-1, 1144-2, 1144-3): Indicates a relative distance display between the respective moving bodies (distance calculation considering the span of the section is performed).
Reference numeral 1145: (? Display): Indicates that the vehicle has stopped for a certain period of time or information has been interrupted, and that tracking of the moving object is to be continued.
Reference numeral 1146: (x display): Indicates that the vehicle has stopped for a certain period of time or information has been interrupted, and that tracking of the moving object is not performed.

  In FIG. 6, the distance display 1144-1 indicates that the distance between the first car and the second car is 401 m. Further, the distance display 1144-2 indicates that the distance between the second car and the third car is 240 m. Further, the distance display 1144-3 indicates that the distance between the first car and the third car is 641 m.

  In addition, the distance display 1143-1 indicates that the distance from the first car to the end of the fifth ward is 165m, and similarly, the distance display 1143-2 from the second car to the fifth ward end is 566m. The display 1143-3 indicates that the distance from the third car to the end of the fifth ward is 806 m.

  Although not shown, the estimated arrival time from the current position of the moving body to a predetermined position, for example, the end of the 5th ward may be displayed.

  Next, a sixth example of information display on the display unit 27 in FIG. 1 will be described with reference to FIG. FIG. 7 shows a state where a mark display position is designated on a map and the point is listed as a landmark. Various landmarks can be placed on the map. The landmark is registered by clicking the mouse with a characteristic position on the map, for example, 115. In addition, characters can be displayed on each landmark.

  By selecting a landmark layer in the display window 110 of FIG. 4, the landmark window 116 of FIG. 7 is displayed. However, “characters to be displayed” and “direction” are blank, and “characters to be displayed” and “direction” can be entered and registered by selecting “add” in the landmark window 116. .

  For example, in FIG. 7, the item 117 corresponding to the position 115 is selected, and the name label 118 corresponding to the position 115, for example, “first Miyanoshita pier” is entered and registered in the “character to be displayed” section. By entering and registering the character direction, for example, vertical, in the “direction” section, the name label 118 of “first Miyanoshita pier” is displayed in vertical writing immediately below the position 115.

  Further, the map display may be switched according to the position information of the moving body. In that case, for example, the scale and map display position at which all the position displays of the three moving bodies are displayed are automatically selected. And may be displayed.

  In addition, a position mark indicating the estimated position of the mobile object after a predetermined time may be displayed from the current position of the relay car as a mobile object and the operation status thereof.

  In addition, when the position markers of the relay vehicle as a moving body overlap, they may be alternately overwritten and displayed.

  According to the above-described embodiment of the present invention, for example, before performing a marathon relay or relay relay relay, a relay vehicle that is a moving body is moved along the course on a trial basis, so that transmission at each point of the course is performed. By switching to a relay vehicle that is another mobile body with good transmission status of transmission information immediately before the transmission status of transmission information becomes worse, it is possible to grasp the transmission status of information beforehand. Live coverage can be made smoother.

  Further, according to the embodiment of the present invention, the position marker of the moving body and the movement and / or movement estimation information of the moving body when the relay vehicle that is the moving body is moved along the course are displayed. Can be grasped during the live broadcast.

  In addition, according to the embodiment of the present invention, the quality of the video signal reception state in relation to the position of the moving body on the receiving side involved in the video signal transmission and the moving situation, for example, the speed and moving direction of the moving body. Can be confirmed. Therefore, in the case where confirmation was made only with the position of the moving body in the past, a phenomenon such as a transmission failure caused by the moving direction and speed of the moving body could not be confirmed in relation to the speed or moving direction. Can be possible.

  For example, when the moving body is moving at high speed with respect to the transmission / reception direction, the amount of fading phase difference in the received signal of the moving body increases according to the speed, and the transmission quality further decreases. Thus, it can be confirmed that the error amount is increased as compared with the case where the moving body is low speed.

  In addition, when the moving body moves at a high speed when the moving body passes at a spot where the electric field intensity is weak as a spot, the transmission state may be stabilized by the guard interval and no error may occur. On the other hand, when the moving body passes through the point at a low speed, it can be confirmed that it is not guarded and is likely to cause an error.

  Therefore, since it is possible to grasp the transmission state in relation to not only the position of the moving body but also the movement state, it is possible to construct a high-quality transmission system more efficiently.

DESCRIPTION OF SYMBOLS 10 ... Mobile body, 11 ... Distance meter, 12 ... GPS receiver, 13 ... Imaging camera, 14 ... Transmission part, 15 ... Transmission antenna, 20 ... Base station, 21 ... Reception antenna, 22 ... Reception part, 23 ... Personal computer, 24 ... movement state output unit, 25 ... state determination unit, 26 ... state display control unit, 27 ... display unit, 101 ... course shown by white line, 102 ... plot line represented by solid line part, 103 ... represented by white line part 104 ... Threshold input unit, 105, 105A, 105B ... Data list window, 106 ... Click point information window, 107, 108 ... Plot lines displayed side by side, 109 ... Between the click point and the base station Connecting line, 110 ... Display window, 111 ... Outward item, 112 ... Returning item, 113 ... Position marker of moving object, 114 ... Moving object distance information, 115 ... On the map A symptom position, 116 ... landmark window, items corresponding to 117 ... position 115, 118 ... name label.

Claims (2)

A video signal obtained by imaging with an imaging device of a relay vehicle moving on a course having different transmission conditions on the forward path and the return path is wirelessly transmitted from the relay vehicle while the relay vehicle is moving, and the transmission is performed at a base station. A transmission state display method in an information transmission system for receiving a received video signal,
Receiving transmission information which is wirelessly transmitted from the relay vehicle, from the received said transmission information, and acquires the distance value the relay vehicle is moved, the on the map by converting the distance value obtained latitude and longitude information It generates positional information of the relay vehicle, and displays the position marker indicating the current position of the relay vehicle in the course on the map, if the relay vehicle there are a plurality, and the distance of each relay vehicle, between the respective broadcasting van The transmission distance display method is characterized in that the relative distance of the relay vehicle , the distance from the current position of the relay vehicle to the next relay station or turnaround point , or the estimated arrival time are displayed. A video signal obtained by imaging with an imaging device of a relay vehicle moving on a course having different transmission conditions on the forward path and the return path is wirelessly transmitted from the relay vehicle while the relay vehicle is moving, and the transmission is performed at a base station. A transmission status display device in an information transmission system for receiving a received video signal,
Receiving transmission information which is wirelessly transmitted from the relay vehicle, from the received said transmission information obtaining means for obtaining a distance value the relay vehicle has moved,
Generating means for converting the acquired distance value into latitude and longitude information and generating position information of the relay vehicle on a map;
And displays the position marker indicating the current position of the relay vehicle in the course on the map, if the relay vehicle there are a plurality, and the distance of each relay vehicle, the relative distance between the respective relay vehicle, of the relay vehicle A transmission status display device comprising: a display means for displaying a distance from the current position to the next relay station or turnaround point or an estimated arrival time.

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