JP2009188845A - Relay station measuring apparatus, relay station monitoring device and relay station monitoring program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay station measuring apparatus capable of remotely monitoring, at low cost, a receiving state of a monitoring channel in a relay station. <P>SOLUTION: A relay station measuring apparatus 2 includes: a receiving state measuring means 21 which measures a receiving state of a monitoring channel and outputs a measurement value; a video output means 25 which outputs a video of the monitoring channel; and a monitor video generating means 23 which generates a color code, in which color tiles are longitudinally and laterally continued, displayed in a predetermined color and generating a monitor video by adding the color code to the video output by the video output means 25. The monitor video generating means 23 includes a measurement value converting means 23a for converting the measurement value into color information, an identifier generating means 23b for generating a color tile identifier, and a color code generating means 23c for generating the color code. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a relay station measurement device, a relay station monitoring device, and a relay station monitoring program for remotely monitoring a reception state of a monitoring channel in a relay station.

Conventionally, an invention that can detect the signal level of a television signal and determine whether the reception state is good or not has been disclosed (see Patent Document 1). The receiver described in Patent Document 1 distinguishes between failure of the device and a poor reception state of the television signal by displaying the quality of the reception state on the screen, and does not give the user anxiety.
JP-A-5-75488

Here, unlike a large-scale relay station, a small-scale relay station is cost-effective for capital investment for monitoring the relay station because of the relationship between the relay station equipment and the number of households that the relay station relays. It is difficult and low cost is required.
However, since the receiver described in Patent Document 1 cannot store and transmit measurement values, it is necessary to constantly monitor manually at the place where the receiver is installed, which is problematic in terms of labor costs and the like. . At this time, it is conceivable that the relay station and the receiver are connected by a transmission line for remote monitoring. However, in a small-scale relay station, in addition to the surveillance video transmission line, a data transmission line can be borrowed or a new dedicated line can be used. It is difficult to provide a line because of cost problems.

  An object of the present invention is to provide a relay station measurement device, a relay station monitoring device, and a relay station monitoring program that can remotely monitor the reception state of a monitoring channel at a relay station at low cost.

  In order to solve the above-described problem, a relay station measurement apparatus according to claim 1 is a relay station measurement apparatus that measures a reception state of a monitoring channel in a relay station, wherein the reception state measurement means, video output means, and monitoring video generation And the monitoring video generation means includes a measurement value conversion means, an identifier generation means, and a color code generation means.

According to such a configuration, the relay station measurement device generates the color tile identifier including the color used only by the color tile identifier by the identifier generation unit. In the relay station measurement device, the monitoring video generation unit generates a monitoring video with a color code including a color tile identifier serving as a clue when detecting the color code added to the monitoring video. This color code is a color in which each of the color tiles constituting the color code indicates a measurement value or a color tile identifier of the reception state of the monitoring channel. Therefore, the relay station monitoring apparatus that has received the monitoring video can detect the color code by using the color tile identifier included in the monitoring video as a clue, and can acquire the reception state of the monitoring channel from the color information of the color tiles constituting the color code.
For example, when a monitoring video transmission line for transmitting the monitoring video of the relay station is laid, the relay station measuring apparatus can transmit a monitoring video with a color code added thereto using the monitoring video transmission line. On the other hand, when the monitoring video transmission line is not laid, the relay station measuring apparatus can transmit the monitoring video with the color code added thereto using the wireless communication line. This eliminates the need for the relay station monitoring apparatus to provide a dedicated line for transmitting the measurement value.

  A relay station measurement apparatus according to a second aspect is the relay station measurement apparatus according to the first aspect, wherein the color code generation means can change the size of the color tile.

  According to such a configuration, the relay station measuring apparatus can change the size of the color tile according to the reception state of the monitoring channel by the color code generation unit. For example, when the reception state of the monitoring channel is good, the color tile If the monitor channel is poor and the reception state of the monitoring channel is poor, the color tile can be enlarged.

  The relay station measurement apparatus according to claim 3 is the relay station measurement apparatus according to claim 1 or 2, wherein the reception state measurement unit includes at least a reception level, a bit error rate, and a carrier noise ratio as the measurement values. Is measured and output.

  According to this configuration, the relay station measurement apparatus measures the minimum measurement value indicating the reception state of the monitoring channel by the reception state measurement unit.

  In order to solve the above-described problem, the relay station monitoring apparatus according to claim 4 shows the measurement value of the reception state of the monitoring channel in the relay station, and the color tiles displayed in a predetermined color are continuous vertically and horizontally. In the relay station monitoring apparatus that remotely monitors the reception state of the monitoring channel using the monitoring video to which the color tile is added, an identifier detection unit, a color detection unit, a measurement value reverse conversion unit, and a warning unit are provided. It was set as the structure provided.

According to such a configuration, the relay station monitoring apparatus receives the monitoring video to which the color code including the color tile identifier serving as a clue when detecting the color code is added. This color code is a color in which each of the color tiles constituting the color code indicates a measurement value or a color tile identifier of the reception state of the monitoring channel. Further, the relay station monitoring device extracts the color area used only by the color tile identifier from the monitoring video by the identifier detection means. Then, the relay station monitoring device detects the color code using the color tile identifier included in the monitoring video as a clue, and the color detection means and the measured value reverse conversion means detect the monitoring channel from the color tile color information constituting the color code. The measurement value of the reception status can be acquired. Therefore, the relay station monitoring device can remotely monitor the reception state of the monitoring channel at the relay station by the warning means without relying on human hands.
For example, when a monitoring video transmission line for transmitting the monitoring video of the relay station is laid, the relay station monitoring apparatus can receive the monitoring video with the color code added using the monitoring video transmission line. On the other hand, when the monitoring video transmission line is not laid, the relay station monitoring apparatus can receive the monitoring video with the color code added using the wireless communication line. This eliminates the need for the relay station monitoring apparatus to provide a dedicated line for receiving the measurement value.

  The relay station monitoring apparatus according to claim 5 is the relay station monitoring apparatus according to claim 4, wherein the color detection unit obtains a position of a center pixel for each of the color tiles, and depends on a reception state of the monitoring channel. A color obtained by averaging the color of the center pixel and the color of surrounding pixels existing around the center pixel is detected as the color information.

  According to such a configuration, the relay station monitoring apparatus increases error tolerance because the color detection unit averages the color of the center pixel with the color of the surrounding pixels when, for example, the reception state of the monitoring channel is poor.

  The relay station monitoring apparatus according to claim 6 is the relay station monitoring apparatus according to claim 4 or 5, wherein the measurement value reverse conversion means includes at least a reception level, a bit error rate, and carrier noise as the measurement values. The ratio is inversely transformed.

  According to this configuration, the relay station monitoring apparatus reversely converts the minimum measurement value indicating the reception state of the monitoring channel by the measurement value reverse conversion unit.

  In order to solve the above-described problem, the relay station monitoring program according to claim 7 shows the measurement value of the reception state of the monitoring channel in the relay station, and the color tiles displayed in a predetermined color are continuous vertically and horizontally. A configuration in which a computer functions as an identifier detection unit, a color detection unit, a measurement value reverse conversion unit, and a warning unit in order to remotely monitor the reception state of the monitoring channel using the monitoring video to which the color code is added did.

According to the present invention, the following excellent effects can be obtained.
According to the first, fourth, and seventh aspects of the present invention, since it is not necessary to provide a dedicated line for transmitting the measurement value, it is possible to remotely monitor the reception state of the monitoring channel at the relay station at a low cost. According to the first, fourth, and seventh aspects of the present invention, since the color area used only by the color tile identifier is extracted from the monitoring video, the color tile identifier can be quickly detected, and the relay station monitoring apparatus can be speeded up. it can.

According to the second aspect of the present invention, since the size of the color code can be changed, the size of the color code composed of color tiles is also changed, and it is possible to prevent the monitoring video from becoming difficult to see due to the color code.
According to the invention of claim 3, the minimum measurement value indicating the reception state of the monitoring channel is measured.
According to the invention of claim 5, since error tolerance is high, it is possible to prevent the measurement value from being converted back to an incorrect value even when the reception state of the monitoring channel is bad, and to increase the accuracy of the measurement value. it can.
According to the invention which concerns on Claim 6, the minimum measured value which shows the receiving state of a monitoring channel is reversely converted.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In each embodiment, means and devices having the same function are denoted by the same reference numerals, and description thereof is omitted.

(First embodiment)
[Outline of relay station monitoring system]
An outline of the relay station monitoring system will be described with reference to FIG. FIG. 1 is a schematic diagram of a relay station monitoring system including a relay station measurement device and a relay station monitoring device according to the first embodiment of the present invention. The relay station monitoring system 1 in FIG. 1 uses an existing monitoring video transmission line 6 and includes a relay station measuring device 2, a relay station monitoring device (monitor PC) 3, a video server 4, and broadband routers 5a and 5b, A monitoring video transmission line 6 and an antenna 7 are provided.

The relay station measuring apparatus 2 measures the reception state of the monitoring channel and generates a monitoring video to which a color code (color tile super) is added. Here, the relay station measurement device 2 receives the terrestrial digital broadcast via the antenna 7. Details of the relay station measuring apparatus 2 will be described later.
The video server 4 is connected to the relay station measurement device 2 by a general-purpose cable such as a coaxial cable, records the monitoring video generated by the relay station measurement device 2, and outputs the monitoring video to the broadband router 5a.
The broadband router 5a is connected to the video server 4 by a general-purpose cable, and is connected to the broadband router 5b via the monitoring video transmission line 6. Then, the broadband router 5a transmits the monitoring video output from the video server 4 to the broadband router 5b.
Here, the relay station measurement device 2, the video server 4, the broadband router 5a, and the antenna 7 are installed at an arbitrary location (not shown) in the broadcast area such as a relay station of a digital terrestrial broadcasting network.

The surveillance video transmission line 6 is a line for transmitting surveillance video, for example, an existing optical fiber line.
The broadband router 5 b is connected to the relay station monitoring device 3 with a general-purpose cable, and outputs the received monitoring video to the relay station monitoring device 3.
The relay station monitoring device 3 displays the measurement value of the reception state of the monitoring channel at the relay station, and uses the monitoring video to which a color code in which color tiles displayed in a predetermined color are vertically and horizontally is added is used for monitoring. Remote monitoring of channel reception status. Details of the relay station monitoring device 3 will be described later.
Here, the relay station monitoring device 3 and the broadband router 5b are installed in an arbitrary place such as a broadcasting hall.

In this way, the relay station monitoring system 1 goes to the relay station where the relay station measurement device 2 is installed because the relay station measurement device 2 transmits the monitoring video to the relay station monitoring device 3 installed at a remote location. In addition, it is possible to remotely monitor the reception state of the monitoring channel at the relay station.
Further, since the relay station measuring device 2 and the relay station monitoring device 3 are configured separately from communication devices such as the broadband routers 5a and 5b, respectively, the transmission line is not specified, and the versatility is high at low cost. Therefore, a flexible system can be constructed according to the maintenance status of communication devices and transmission lines.

[Configuration of relay station measurement device]
Hereinafter, the configuration of the relay station measurement apparatus will be described with reference to FIG. FIG. 2 is a block diagram of the relay station measurement apparatus of FIG. The relay station measurement device 2 includes a reception state measurement unit 21, a monitoring video generation unit 23, and a video output unit 25.

  The reception state measuring means 21 measures the reception state of the monitoring channel at the relay station and outputs a measurement value. For example, the reception state measuring means 21 can be configured by a level checker circuit that measures the reception state of the monitoring channel. Here, the reception state measuring means 21 measures at least the reception level, bit error rate (BER), and carrier noise ratio (C / N) of the monitoring channel as measurement values. Here, the reception state measurement means 21 measures the carrier noise ratio of the monitoring channel, but the carrier noise ratio may be inferred from the bit error rate.

  Further, the reception state measuring means 21 may add the physical channel number of the monitoring channel to the measurement value. Further, the reception state measuring unit 21 may obtain a flag indicating whether the measured carrier noise ratio is equal to or higher than the upper limit of the measurement limit, lower than the lower limit of the measurement limit, or within the measurement range, and may be added to the measured value. This flag is, for example, “4 (yellow)” when the carrier noise ratio is equal to or higher than the upper limit of the measurement limit, “3 (red)” when the carrier noise ratio is equal to or lower than the lower limit of the measurement limit, and “2 ( Green) ”.

  The video output means 25 outputs the video of the monitoring channel. For example, the video output means 25 can be composed of a terrestrial digital broadcast tuner circuit that selects the terrestrial digital broadcast received by the reception state measurement means 21 and outputs the video of the monitoring channel to the monitoring video generation means 23.

  The monitoring video generation unit 23 converts the measurement value output by the reception state measurement unit 21 into color information, generates a color code in which color tiles displayed in a predetermined color are continuous vertically and horizontally, and the video output unit 25 outputs the color code. A surveillance video is generated by adding a color code to the recorded video. For example, the monitoring video generation means 23 can be configured by an on-screen display (OSD) circuit.

  In addition, the monitoring video generation unit 23 can change the position where the color code is added. In this case, the position where the color code is added (coordinate where the upper left portion of the color code is located in the video) is stored in advance in storage means described later. Here, the monitoring video generation unit 23 includes a measurement value conversion unit 23a, an identifier generation unit 23b, and a color code generation unit 23c in order to generate a color code. A specific example of color code generation will be described later.

The measurement value conversion unit 23a converts the measurement value output from the reception state measurement unit 21 into color information based on the color value correspondence information. At this time, the measurement value conversion unit 23a may obtain a display color indicating a color when the carrier noise ratio is displayed on the monitoring video. For example, when the bit error rate after Viterbi decoding is less than 2.0 × 10 ⁻⁴ , the measurement value conversion unit 23a determines that the reception state of the monitoring channel is good and sets the display color to “2 (green)”. To do. On the other hand, when the bit error rate is 2.0 × 10 ⁻⁴ or more and within the measurement range, the measurement value conversion unit 23a determines that the reception state of the monitoring channel is block noise, and sets the display color to “4 ( Yellow) ”, when the bit error rate is 2.0 × 10 ⁻⁴ or more and out of the measurement range, the reception state of the monitoring channel is determined to be defective, and the display color is set to“ 3 (red) ”. Set.
Further, the measurement value conversion means 23a may read a station code stored in advance in storage means (not shown) described later and convert it into color information.

  The identifier generating unit 23b generates a color tile identifier indicating a predetermined color pattern. Here, the identifier generation unit 23b generates a color tile identifier including a color that is not included in the color numerical value correspondence information.

  Based on the format information, the color code generation unit 23c uses the color code as the color indicated by the color tile identifier generated by the color information converted by the measurement value conversion unit 21a or the color tile identifier generated by the identifier generation unit 23b. Is to be generated. Here, the color code generation unit 23c generates a color code composed of square color tiles, but may generate a color code composed of rectangular color tiles (not shown).

  In addition, the color code generation unit 23c can change the size of the color tile. The size of the color tile indicates the number of pixels in the horizontal axis direction and the number of pixels in the vertical axis direction of the color tile. At this time, the size of the color tile is manually set in advance according to the performance of the communication device or the transmission line and the reception state of the monitoring channel. Needless to say, if the size of the color tile is changed, the size of the color code is changed.

  The relay station measuring apparatus 2 may include a storage unit (not shown), and store color numerical value correspondence information and format information described later in the storage unit. This storage means can be constituted by, for example, an HDD (Hard Disk Drive).

<Specific examples of color code generation>
Hereinafter, the generation of the color code will be specifically described with reference to FIG. 3 (see FIG. 3 as appropriate). FIG. 3 is a diagram for explaining generation of a color code in the first embodiment of the present invention, (a) is a diagram for explaining color numerical value correspondence information, and (b) is a color code structure and format. It is a figure explaining information.

  As shown in FIG. 3A, the color value correspondence information is information in which a numerical value and a color are associated in advance. For example, black is “0”, white is “1”, green is “2”, red Correspond to “3” and yellow to “4”. As described above, the color numerical value correspondence information uses five colors other than blue among the six colors of black, white, blue, red, yellow, and green, and associates the RGB value of each color with the numerical value.

  As shown in FIG. 3B, the color code is composed of a predetermined number of color tiles in the vertical and horizontal directions, for example, a total of 24 square color tiles, 3 vertical and 8 horizontal. In FIG. 3B, the numerical value in the parenthesis indicates the number of color tiles constituting the measurement value or the color tile identifier. For example, the color tile identifier is composed of three color tiles, and the station code is composed of four color tiles. Further, in FIG. 3B, the BER mantissa indicates the mantissa part of the bit error rate, and the BER index indicates the exponent part of the bit error rate.

  Hereinafter, when a color tile at a specific position in the color code is shown, the color tile (m, m) indicated by the position m in the horizontal axis direction in the color code and the position n in the vertical direction in the color code with the upper left portion of the color code as a reference. n) (where 0 ≦ m ≦ 7, 0 ≦ n ≦ 2). For example, the color tile (0, 0) indicates the color tile in the uppermost row of the color code, and the color tile (7, 2) indicates the color tile in the lowermost row of the color code.

  The format information associates in advance the positional relationship between the color tile in the color code, the color tile identifier, and the measurement value. For example, the color tile (0, 0) indicates that a color tile identifier is stored, and the color tile (7, 2) indicates that a display color is stored.

Here, the description will be continued assuming that the reception level is the following value.
Reception level: 59 (dBμV)
Bit error rate: 2.43 × 10 ⁻⁷
Carrier noise ratio: 26 (dB)
Station code: 108
Physical channel number: 16
Flag: 2
Display color: 2
In the bit error rate, the mantissa part has the second decimal place.

  The measured value conversion means 23a converts the reception level, the carrier noise ratio, and the physical channel number from a decimal number to a decimal number because the color value correspondence information is defined by five colors. The measured value conversion means 23a divides the bit error rate into a mantissa part and an exponent part, multiplies the mantissa part by 100, removes the minus sign of the exponent part, and then converts the mantissa part and the exponent part respectively. Convert decimal number to quinary number. In other words, the measurement value conversion unit 23a converts the mantissa part “243” of the bit error rate and the exponent part “7” of the bit error rate into a quinary number.

  In addition, the measurement value conversion means 23a converts the reception level, carrier noise ratio, physical channel number, and station code into a quinary number as described above. Here, the format information may include information indicating that the reception level, the carrier noise ratio, the physical channel number, and the station code are stored in quinary numbers. Note that flags and display colors are not converted to quinary numbers.

Here, the description will be continued assuming that the following measurement values are converted into color information.
Reception level after conversion to quinary number: 214
Mantissa part of bit error rate after quinary conversion: 1433
Exponential part of bit error rate after quinary conversion: 12
Carrier noise ratio after quinary conversion: 101
Station code after quinary conversion: 0413
Physical channel number after quinary conversion: 31
Flag: 2
Display color: 2

  Further, the measured value conversion means 23a uses the color value correspondence information to convert the reception level converted to the quinary number, the mantissa part of the bit error rate, the exponent part of the bit error rate, the carrier noise ratio and the physical channel number, and the flag and display. Convert each color to color information. For example, the measured value conversion means 23a converts the numerical value of each digit of the reception level “214” after the quinary conversion into color information, that is, converts “2” into green, converts “1” into white, Convert “4” to yellow.

Here, the description will be continued assuming that the measured value is converted into color information as follows.
Reception level after color conversion: green white yellow Mantissa part of bit error rate after color conversion: white yellow red red Exponential part of bit error rate after color conversion: carrier noise ratio after white color conversion: monochrome white color conversion Subsequent station code: Black yellow white red Physical channel number after color change: Red white Flag after color conversion: Green Display color after color conversion: Green

  The identifier generating unit 23b generates a color tile identifier indicating a color pattern in the order of blue, green, and red, for example, including a color (blue) that is not included in the color numerical value correspondence information among the six colors.

  The color code generation unit 23c changes the color tile at a predetermined position to a color indicating the color tile identifier generated by the identifier generation unit 23b. Specifically, the color code generation unit 23c sets the color tile (0, 0) to blue, the color tile (0, 1) to green, and the color tile (0, 2) to red. As a result, the colors of the three color tiles that are continuous in the vertical axis direction with the color tile (0, 0) as the base point are the same as the color pattern of the color tile identifier.

Further, the color code generation unit 23c changes the color tile at a predetermined position to the color indicated by the color information converted by the measurement value conversion unit 23a. For example, since the reception level converted into color information is “green white yellow”, the color code generation unit 23c sets the color tile (1, 1) to green, the color tile (1, 2) to white, and the color tile (1 , 3) is yellow.
Similarly to the reception level, the color code generation unit 23c converts the color tile at a predetermined position into color information by the measurement value conversion unit 23a, the mantissa part of the bit error rate, the exponent part of the bit error rate, the carrier The color indicated by the noise ratio, station code, physical channel number, flag, and display color is used.

<Specific example of surveillance video>
Hereinafter, a specific example of the monitoring video will be described with reference to FIG. FIG. 4 is a diagram for explaining the monitoring video generated by the relay station measurement apparatus of FIG.
As shown in FIG. 4, the color code is added to a predetermined position of the monitoring video, for example, the lower left portion. In addition, a physical channel number “16” is added to the upper left part of the monitoring video by the monitoring video generation means 23. Further, a carrier noise ratio “26” is added to the lower right portion of the monitoring video by the monitoring video generation means 23. The carrier noise ratio is a color set as a display color, for example, green.

  As shown in FIG. 4, since the color code is used, the relay station measurement apparatus 2 uses one color tile as compared with a case where a single color tile can express only two types (binary numbers) of information. Since the amount of information that can be stored in the tile increases, the total number of color tiles decreases, each color tile can be enlarged, and the color code can be made large enough that the surveillance video does not become difficult to see.

[Configuration of relay station monitoring device]
Hereinafter, the configuration of the relay station monitoring apparatus will be described with reference to FIG. FIG. 5 is a block diagram of the relay station monitoring apparatus of FIG. The relay station monitoring device 3 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and an HDD (Hard Disk Drive). The relay station monitoring apparatus 3 includes an identifier detection unit 31, a central pixel color detection unit (color detection unit) 32, a measured value reverse conversion unit 33, a warning unit 34, and a storage unit 35.

  The identifier detection means 31 detects a color area that changes in a predetermined color pattern included in the monitoring video as a color tile identifier, and outputs the position of the color tile identifier. First, the identifier detection unit 31 extracts a color that is not included in the color numerical value correspondence information out of the six colors described above, here, a blue region from the monitoring video. Further, the identifier detection means 31 sets a detection point at the center pixel of this color region (blue region).

  The identifier detection means 31 detects the color of the detection point while moving the detection point in a predetermined direction within the search range and at a search interval. Here, the identifier detection unit 31 moves the detection point in the vertical axis direction from the upper side to the lower side of the monitoring video, and detects color information based on the RGB value of the detection point. Furthermore, when the color of the detection point changes in the same order as the color tile identifier, in this case, in the order of blue, green, and red, the identifier detection unit 31 determines the coordinates of the center pixel of this color region (blue region) as follows: Output as the position of the color tile identifier.

  Further, the identifier detection means 31 can change the search interval. Here, the search interval is manually set in advance according to the performance of the communication device or the transmission line and the reception state of the monitoring channel. By widening the search interval, the relay station monitoring device 3 can reduce the amount of computation of the identifier detection means 31, and therefore the relay station monitoring device can be speeded up.

  The search interval indicates an interval for moving the detection point, and is, for example, one pixel. In this case, the identifier detection unit 31 detects the color of the detection point while moving the detection point pixel by pixel. The search range indicates the range in which the detection point is moved, and may be the same value as the number of pixels in the vertical direction of the color code. In this case, the identifier detection means 31 moves the detection point within a range of 30 pixels from the center pixel of this color region (blue region).

The identifier detection unit 31 does not detect the color code when the color of the detection point does not change in the same order as the color pattern of the color tile identifier, or when a color that is not included in the color tile identifier is detected. A detection point is set at the center pixel of the next color area, and the detection of the color tile identifier is attempted in the same manner as described above. If the color tile identifier cannot be detected in all the color regions extracted from the monitoring video, the identifier detection unit 31 outputs an identifier warning signal indicating that the color tile identifier is inappropriate to the warning unit 34 for processing. May be terminated.
As described above, since it is determined whether the color tile identifier is inappropriate, the relay station monitoring device 3 can prevent reverse conversion of the measurement value from the portion other than the color code in the monitoring video, and the measurement The accuracy of the value can be increased.

The center pixel color detection unit 32 obtains the position of each color tile in the color code using the position of the color tile identifier output from the identifier detection unit 31 as a reference, and detects color information for each color tile. Further, the center pixel color detection means 32 obtains the position of the center pixel for each color tile, and averages the color of the center pixel and the colors of the surrounding pixels existing around the center pixel according to the reception state of the monitoring channel. The detected color is detected as color information. Here, whether or not to perform averaging and the range of surrounding pixels to be averaged are manually set in advance according to the performance of the communication device or transmission line and the reception state of the monitoring channel. .
As described above, since the color code has a small total number of color tiles and each color tile is large, the center pixel color detection means 32 averages the colors of the center pixels when the reception state of the monitoring channel is bad, and an error occurs. High tolerance can be achieved.

  Hereinafter, with reference to FIG. 6, the processing of the central pixel color detection means will be described in detail (see FIG. 5 as appropriate). FIG. 6 is a diagram for explaining the processing of the central pixel color detecting means in FIG. In FIG. 6, the color tile height is indicated by a symbol a, the color tile width is indicated by a symbol b, and the central pixel of the color area is indicated by a symbol c. Here, the color tile height a and the color tile width b indicate the size of the color tile. The position m ′ of the color tile in the horizontal axis direction of the color code and the position n of the color tile in the vertical axis direction of the color code indicate the position of the color tile (where 1 ≦ m ′ ≦ 7). The reason why the position m 'in the horizontal axis direction of the color tile is used is that the leftmost column of the color code is the color tile identifier.

The center pixel color detection means 32 obtains center coordinates in the horizontal axis direction for each color tile. Specifically, a value obtained by multiplying the horizontal axis coordinate cx of the center pixel of the color region detected by the identifier detecting unit 31 by the position m ′ in the horizontal axis direction of the color tile and the color tile width b is added. The center coordinate xm ′ in the vertical axis direction can be obtained for each. That is, the central coordinate xm ′ in the horizontal axis direction for each color tile is expressed by Expression (1). Expression (1) xm ′ = cx + (m ′ × b)

Further, the center pixel color detecting means 32 obtains center coordinates in the vertical axis direction for each color tile. Specifically, a value obtained by multiplying the vertical coordinate cy of the center pixel of the color area detected by the identifier detection unit 31 by the position n in the vertical direction of the color tile and the color tile height a is added. The center coordinate yn in the vertical axis direction can be obtained for each. That is, the center coordinate yn in the vertical axis direction for each color tile is expressed by Expression (2).
Formula (2) yn = cy + (n × a)

  Further, the center pixel color detection means 32 obtains the coordinates of the center pixel for each color tile from the center coordinate xn in the vertical axis direction for each color tile and the center coordinate ym in the vertical axis direction for each color tile. Color information is detected based on the RGB values.

Hereinafter, returning to FIG. 5, the description of the configuration of the relay station monitoring device 3 will be continued.
The measurement value reverse conversion means 33 reversely converts the color information detected by the central pixel color detection means into measurement values based on the color numerical value correspondence information and the format information. Here, the measured value reverse conversion means 33 reversely converts at least the reception level, bit error rate, and carrier noise ratio as measured values.

  The measured value reverse conversion means 33 reversely converts the color of the center pixel for each color tile into a numerical value based on the color numerical value correspondence information. For example, if the central pixel corresponding to the color tile (1, 1) is green, the measured value reverse conversion means 33 converts this color back to “2” and the center corresponding to the color tile (1, 2). If the pixel is white, the color is converted back to “1”, and if the central pixel corresponding to the color tile (1, 3) is yellow, the color is converted back to “4”.

  Here, the measured value inverse conversion means 33 uses the format information to express the three color tiles of the color tile (1, 1), the color tile (1, 2), and the color tile (1, 3) in the quinary notation. It can be seen that the reception level “214” is stored. Therefore, the measured value reverse conversion means 33 can convert this from a decimal number to a decimal number to obtain a reception level “59”. Further, the measurement value reverse conversion means 33 can reversely convert the mantissa part of the bit error rate, the exponent part of the bit error rate, the carrier noise ratio, the station code, the physical channel number, the flag, and the display color, similarly to the reception level. The measured value inverse conversion means 33 may divide the mantissa part of the inversely converted bit error rate by 100 and add a minus sign to the exponent part of the inversely converted bit error rate to obtain the bit error rate. it can.

The measured value inverse conversion means 33 compares the inversely converted station code and the check station code, and if the station code and the check station code do not match, the measured value indicates that the measured value is inappropriate. A warning signal is output to the warning means 34, and the process ends. Further, the measured value reverse conversion unit 33 outputs a measured value warning signal to the warning unit 34 even when the reversely converted measurement value is inappropriate, for example, when the reverse-converted received code is four digits, and the processing is terminated. To do. This check station code is stored in the storage means 35 in advance.
As described above, since the measured value reverse conversion unit 33 determines whether or not the measured value is inappropriate, the relay station monitoring device 3 does not store the erroneous measured value in the storage unit 35 and performs measurement. The accuracy of the value can be increased.

  The warning means 34 compares the measurement value inversely converted by the measurement value reverse conversion means 33 with a preset threshold value, and outputs a warning when the measurement value is less than the threshold value or when the measurement value exceeds the threshold value. . The warning unit 34 includes a display unit such as a display device (not shown) and a voice output unit such as a speaker. The warning unit 34 displays the received monitoring video on the display unit, displays a warning window on the display unit, and outputs a warning sound. May be performed. Furthermore, the warning means 34 may have an email transmission function and may send an email containing the warning message.

  Further, the warning unit 34 compares any one of the reception level, bit error rate, carrier noise ratio, and flag with a threshold value. Moreover, the warning means 34 may compare these measured values with the attention threshold value and the abnormality threshold value as threshold values. Here, the attention threshold is a criterion for determining whether the abnormality is mild, and the abnormality threshold is a criterion for determining whether the abnormality is severe. Note that threshold values such as the attention threshold value and the abnormality threshold value may be stored in the storage unit 35 in advance.

  Here, an example will be described in which the attention threshold is 50, the abnormality threshold is 40, and the warning unit 34 compares the reception level with the attention threshold and the abnormality threshold. For example, if the reception level is less than 50, the warning means 34 outputs a warning window displaying a warning sound or warning message with a small volume in yellow as a reception status warning. Further, if the reception level is less than 40, the warning means 34 outputs a warning window in which a high volume warning sound or warning message is displayed in red as a reception status warning.

  When the identifier warning signal is input from the identifier detection unit 31, the warning unit 34 may output a warning sound or a warning window as a color tile identifier warning as described above. Further, when the measurement value warning signal is input from the measurement value reverse conversion unit 33, the warning unit 34 may output a reception state warning as described above.

The storage unit 35 stores the measurement value that has been inversely converted by the measurement value reverse conversion unit 33.
Here, the abnormality of the relay station in the digital terrestrial broadcasting may be caused by the radio wave propagation abnormality due to the digital / analog wave interference or fading in addition to the initial failure of the relay station equipment or the aging deterioration. In particular, in the latter case, the cause can often be identified by measuring and storing the reception state of the relay station over a long period of time. Therefore, the relay station monitoring device 3 can easily identify the cause of the abnormality of the relay station by storing the measurement value in the storage unit 35.
As described above, the relay station monitoring device 3 can output a warning mechanically using a monitoring image transmitted periodically, so there is no need to perform constant monitoring manually, and digital terrestrial broadcasting This contributes to ensuring the stability of the reception state.

  The color value correspondence information and the format information are preferably synchronized between the relay station measurement device 2 and the relay station monitoring device 3. For this reason, the relay station monitoring device 3 can synchronize with the color value correspondence information and the format information of the relay station measurement device 2.

Hereinafter, the operation of the relay station monitoring apparatus will be described with reference to FIG. 7 (see FIG. 5 as appropriate). FIG. 7 is a flowchart showing the operation of the relay station monitoring apparatus of FIG.
First, the relay station monitoring apparatus 3 detects the color of the detection point while moving the detection point set to the center pixel of the color region by the identifier detection unit 31 (step S1), and the color of the detection point is the color tile identifier. When changing in the same order (Yes in step S1), the coordinates of the central pixel of the color area are output as the position of the color tile identifier. On the other hand, if the color tile identifier cannot be detected (No in step S1), the relay station monitoring device 3 outputs a color tile identifier warning by the warning unit 34 (step S6), and the process is terminated.

  Subsequent to step S1, the relay station monitoring apparatus 3 uses the center pixel color detection unit 32 to detect the size and color of the color tiles constituting the color code based on the coordinates of the center pixel of the color area detected by the identifier detection unit 31. The coordinates of the center pixel for each color tile are obtained from the position of the color tile in the code, and the color of the center pixel for each color tile is detected (step S2).

  Subsequent to step S2, the relay station monitoring device 3 uses the measured value inverse conversion unit 33 to detect the color information of the center pixel for each color tile detected by the center pixel color detection unit 32 based on the color value correspondence information and the format information. Is converted back to a measured value (step S3). Then, the relay station monitoring device 3 writes the measurement value reversely converted by the measurement value reverse conversion unit 33 in the storage unit 35.

Subsequent to step S3, the relay station monitoring device 3 compares the measurement value reversely converted by the measurement value reverse conversion unit 33 with a preset threshold value by the warning unit 34 (step S4), and the measurement value is less than the threshold value. If there is (measured value normal, No in step S4), a reception state warning is output and the process is terminated (step S5). On the other hand, when the measured value is not less than the threshold (measured value abnormality, Yes in step S4), the relay station monitoring device 3 ends the process.
In addition, it is preferable that the relay station monitoring apparatus 3 starts the above-described processing at a preset interval, for example, an interval of 10 seconds to 30 seconds.

(Second Embodiment)
Hereinafter, with reference to FIG. 8, a difference from the relay station monitoring system according to the second embodiment from FIG. 1 will be described. FIG. 8 is a schematic diagram of a relay station monitoring system including a relay station measurement device and a relay station monitoring device according to the second embodiment of the present invention. The relay station monitoring system 1B of FIG. 8 uses a wireless communication line 9, and includes a relay station measuring device 2, a relay station monitoring device (cellular phone) 3b, and a wireless communication device 8.

The wireless communication device 8 is connected to the relay station measurement device 2 with a general-purpose cable, and transmits the monitoring video generated by the relay station measurement device 2 to the relay station monitoring device 3b via the wireless communication line 9.
The wireless communication line 9 is a wireless communication line such as a mobile phone line, for example.
The relay station monitoring device 3b is provided with display means such as a liquid crystal screen and a wireless communication function in addition to the same functions as the relay station monitoring device 3 of FIG. .
As described above, since the relay station monitoring system 1B can carry the relay station monitoring apparatus 3b, a more flexible system can be constructed.

  In each embodiment, the relay station measurement device and the communication device according to the present invention are described as being configured separately. However, the relay station measurement device according to the present invention may include a communication device.

  In each embodiment, the reception level or the like is exemplified as the measurement value. However, in the present invention, the measurement value is not limited to these. For example, in the relay station measuring apparatus according to the present invention, the reception state measuring means may measure the modulation error rate (MER) of the monitoring channel and add this modulation error rate to the measured value. In this case, needless to say, the relay station monitoring apparatus according to the present invention inversely converts the modulation error rate included in the color code.

  In each embodiment, the monitoring channel is described as one channel. However, in the present invention, a plurality of channels may be used as the monitoring channel. For example, the relay station measuring apparatus according to the present invention generates monitoring video for four channels, and the relay station monitoring apparatus according to the present invention measures from each of four color codes added to the monitoring video for four channels. Invert the value. In this case, the relay station monitoring apparatus according to the present invention divides and displays the monitoring video for four channels by the display means.

  In each embodiment, the relay station monitoring apparatus according to the present invention has been described as an independent apparatus. However, in the present invention, a general computer can be operated by a program that functions as each of the above-described units. This program may be distributed via a communication line, or may be distributed by writing in a recording medium such as a CD-ROM or a flash memory.

1 is a schematic diagram of a relay station monitoring system including a relay station measurement device and a relay station monitoring device according to a first embodiment of the present invention. It is a block diagram of the relay station measuring apparatus of FIG. FIG. 3 is a diagram for explaining generation of a color code in the first embodiment of the present invention, (a) is a diagram for explaining color numerical value correspondence information, and (b) is a diagram for explaining the structure and format information of a color code. It is a figure to do. It is a figure explaining the monitoring image | video produced | generated by the relay station measuring apparatus of FIG. It is a block diagram of the relay station monitoring apparatus of FIG. It is a figure explaining the process of the center pixel color detection means of FIG. It is a flowchart which shows operation | movement of the relay station monitoring apparatus of FIG. It is the schematic of a relay station monitoring system provided with the relay station measuring apparatus and relay station monitoring apparatus which concern on 2nd Embodiment of this invention.

Explanation of symbols

1, 1B Relay station monitoring system 2 Relay station measuring device 3, 3b Relay station monitoring device 4 Video server 5a, 5b Broadband router 6 Monitoring video transmission line 7 Antenna 21 Reception state measuring means 23 Monitoring video generating means 23a Measurement value converting means 23b Identifier generating means 23c Color code generating means 25 Video output means 31 Identifier detecting means 32 Center pixel color detecting means (color detecting means)
33 Measurement value reverse conversion means 34 Warning means 35 Storage means

Claims (7)

In the relay station measuring device that measures the reception state of the monitoring channel in the relay station,
A reception state measuring means for measuring a reception state of the monitoring channel and outputting a measurement value;
Video output means for outputting video of the monitoring channel;
The measurement value output by the reception state measuring unit is converted into color information, a color code in which color tiles displayed in a predetermined color are continuously generated vertically and horizontally is generated, and the color code is added to the image output by the video output unit. And a monitoring video generation means for generating a monitoring video by adding,
The monitoring video generation means includes
Measurement value conversion means for converting the measurement value output by the reception state measurement means into the color information based on color numerical value correspondence information in which numerical values and colors are associated in advance;
Identifier generating means for generating a color tile identifier indicating a predetermined color pattern and including a color not included in the color numerical value correspondence information;
Based on the format information in which the positional relationship between the color tile, the color tile identifier, and the measurement value is associated in advance, the color tile at a predetermined position is set as the color indicated by the color information or the color tile identifier. Color code generating means for generating a color code;
A relay station measuring apparatus comprising:   The relay station measurement apparatus according to claim 1, wherein the color code generation unit can change a size of the color tile according to a reception state of the monitoring channel.   The relay station measurement apparatus according to claim 1 or 2, wherein the reception state measurement unit measures and outputs at least a reception level, a bit error rate, and a carrier noise ratio as the measurement values. The monitor channel reception state measurement value at the relay station is shown, and the color code displayed in a predetermined color in the vertical and horizontal directions is used to remotely monitor the reception state of the monitoring channel using the attached monitoring video. In the relay station monitoring device to be monitored,
A color area that includes a color that is not included in the color numerical value correspondence information in which a numerical value and a color are associated in advance and changes in a predetermined color pattern included in the monitoring video is detected as a color tile identifier, and the color tile identifier Identifier detecting means for outputting the position of
Color detection means for obtaining a position for each color tile based on the position of the color tile identifier output by the identifier detection means, and detecting color information for each color tile;
Based on the color numerical value correspondence information and the format information in which the positional relationship between the color tile and the color tile identifier and the measurement value is associated in advance, the color information detected by the color detection unit is reversed to the measurement value. A measured value reverse conversion means for converting;
A warning means for comparing the measured value inversely converted by the measured value inverse converting means with a preset threshold value, and outputting a warning when the measured value is less than the threshold value or exceeding the threshold value;
A relay station monitoring apparatus comprising:   The color detection unit obtains the position of the central pixel for each color tile, and averages the color of the central pixel and the color of the peripheral pixels existing around the central pixel according to the reception state of the monitoring channel. The relay station monitoring apparatus according to claim 4, wherein a detected color is detected as the color information.   The relay station monitoring apparatus according to claim 4 or 5, wherein the measurement value inverse conversion unit inversely converts at least a reception level, a bit error rate, and a carrier noise ratio as the measurement value. The monitor channel reception state measurement value at the relay station is shown, and the color code displayed in a predetermined color in the vertical and horizontal directions is used to remotely monitor the reception state of the monitoring channel using the attached monitoring video. To monitor the computer,
A color area that includes a color that is not included in the color numerical value correspondence information in which a numerical value and a color are associated in advance and changes in a predetermined color pattern included in the monitoring video is detected as a color tile identifier, and the color tile identifier Identifier detection means for outputting the position of
Color detection means for obtaining a position for each color tile based on the position of the color tile identifier output by the identifier detection means, and detecting color information for each color tile;
Based on the color numerical value correspondence information and the format information in which the positional relationship between the color tile and the color tile identifier and the measurement value is associated in advance, the color information detected by the color detection unit is reversed to the measurement value. Measurement value reverse conversion means to convert,
A warning means for comparing the measured value inversely converted by the measured value inverse converting means with a preset threshold value and outputting a warning when the measured value is less than the threshold value or exceeding the threshold value,
A relay station monitoring program characterized by functioning as

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