JP2016158210A - Remote unit - Google Patents

Abstract

A remote unit capable of adjusting the image quality of a video signal in detail is provided.
Either a normal setting mode in which a receiver 4 of a remote unit 10 adjusts the image quality of a video signal from a server 1 or a detailed setting mode in which the image quality of a video signal is adjusted in more detail than in the normal setting mode. One of them is the microcomputer 201 that sets the image quality adjustment mode of the video signal, the right switch 222 and the left switch 223 that set the adjustment value of the image quality of the video signal, the adjustment mode that is set by the microcomputer 201, and the right switch 222 and the left switch. A differential receiver 202 and a delay line 203 for adjusting the image quality of the video signal according to the adjustment value set by the switch 223 are provided.
[Selection] Figure 1

Description

  The present invention relates to a remote unit.

  Conventionally, there is known a remote unit that is connected between a local server and a remote monitor and outputs video from the local server to a remote monitor via a network cable (for example, a patent). Reference 1). The remote unit includes a transmitter and a receiver. The transmitter is connected to a local server, and further connected to the receiver via a network cable. The receiver is connected to the remote monitor. A keyboard and mouse are also connected to the receiver, and data signals from the keyboard and mouse are output to the server via the receiver and transmitter.

JP 2006-180443 A

  The conventional remote unit can roughly adjust the gain, frequency characteristics, delay, etc. of the video signal from the server, but there is a problem that the image quality cannot be adjusted in detail.

  An object of the present invention is to provide a remote unit capable of adjusting the image quality of a video signal in detail.

  In order to achieve the above object, the remote unit disclosed in the specification includes a first mode for adjusting the image quality of the video signal from the server, and a second mode for adjusting the image quality of the video signal in more detail than the first mode. One of the modes is set by the first setting means for setting the image signal image quality adjustment mode, the second setting means for setting the image signal image quality adjustment value, and the first setting means. Adjusting means for adjusting the image quality of the video signal according to the adjustment mode and the adjustment value set by the second setting means.

  According to the present invention, the image quality of a video signal can be adjusted in detail.

It is a block diagram of the remote unit which concerns on this Embodiment. It is a figure which shows the front panel of a receiver. (A) is a figure which shows the signal waveform of the video signal (R signal, G signal, and B signal) before color-shift adjustment, (B) is the video signal (R signal, G signal, and after color-shift adjustment). It is a figure which shows the signal waveform of B signal. It is a flowchart which shows the operation processing in normal setting mode (the 1). It is a flowchart which shows the operation processing in normal setting mode (the 2). (A) is a figure which shows the signal waveform of the video signal (R signal, G signal, and B signal) before gain adjustment, (B) is the video signal (R signal, G signal, and B signal after gain adjustment). FIG. (A)-(C) are the figures which show the relationship (namely, gain characteristic) of the frequency and amplitude corresponding to Stage1-3, respectively. (A) is a figure which shows the signal waveform of the video signal (R signal, G signal, and B signal) before brightness adjustment, (B) is the video signal (R signal, G signal, and after brightness adjustment). It is a figure which shows the signal waveform of B signal. (A) is a figure which shows the signal waveform of the video signal (R signal, G signal, and B signal) before noise adjustment, (B) is the video signal (R signal, G signal, and B signal after noise adjustment). FIG. It is a flowchart which shows the operation processing of detailed setting mode (the 1). It is a flowchart which shows the operation processing of detailed setting mode (the 2). It is a flowchart which shows the operation processing in detailed setting mode (the 3). It is a flowchart which shows the operation processing in detailed setting mode (the 4).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a remote unit according to the present embodiment.

  As shown in FIG. 1, the remote unit 10 includes a transmitter 3 and a receiver 4. The place where the transmitter 3 is installed is called the local side, and the place where the receiver 4 is installed is called the remote side. The transmitter 3 is installed at a location several hundred meters away from the receiver 4 and connected to the receiver 4 via a LAN (Local Area Network) cable 7.

  The video signal from the server 1 is transmitted to the transmitter 3 and transmitted to the receiver 4 through the LAN cable 7. The receiver 4 outputs the video signal from the server 1 to the monitor 6. On the other hand, an operation signal of a keyboard and a mouse (not shown) connected to any of the USBIFs 214 to 217 of the receiver 4 is transmitted to the server 1 via the receiver 4, the LAN cable 7 and the transmitter 3. As described above, the remote unit 10 displays the video signal of the local server 1 on the remote monitor 6 and transmits the operation signal of the remote keyboard and mouse to the local server 1. The video signal is an analog RGB signal.

  The transmitter 3 includes a microcomputer 101, video amplifiers 102 and 104, a synchronization signal reception unit 103, a synchronization signal transmission unit 105, a differential driver 106, a USB (Universal Serial Bus) module 107, RS-485 transceivers 108 and 109, a video interface. (IF) 110, 113, USBIF 111, control IF 112, and LANIF 114.

  The receiver 4 includes a microcomputer 201, a differential receiver 202, a delay line 203, an offset correction circuit 204, a video amplifier 205, a synchronization signal output unit 206, a USB module 207, a USB hub controller 208, a buzzer 209, an RS-485 transceiver 210, 211, LANIF 212, video IF 213, USBIF 214 to 217, three-color LEDs 218 to 220, select switch 221, right switch 222, left switch 223, EDID switch 224, and PC power switch 225.

  The microcomputer 101 of the transmitter 3 controls the overall operation of the transmitter 3. For example, the microcomputer 101 performs image quality adjustment of the video signals in the video amplifiers 102 and 104, operation control of the differential driver 106, transmission / reception of control signals from the RS-485 transceiver 108, and the like. The microcomputer 101 receives the on / off signal of the server 1 from the receiver 4 when the PC power switch 225 of the receiver 4 is pressed, and transmits the on / off control signal to the remote power supply device 2 via the control IF 112. . When receiving the ON control signal from the microcomputer 101, the remote power supply device 2 supplies power to the server 1. When the remote power supply device 2 receives an OFF control signal from the microcomputer 101, the remote power supply device 2 stops the power supply to the server 1.

  The video amplifier 102 of the transmitter 3 amplifies the video signal from the server 1 via the video IF 110 and transmits it to the video amplifier 104 and the differential driver 106. The video amplifier 104 receives the video signal from the video amplifier 102, amplifies it, and outputs it to the monitor 5 via the video IF 113. The synchronization signal receiving unit 103 receives the synchronization signal from the server 1 via the video IF 110 and transmits it to the synchronization signal transmission unit 105 and the differential driver 106. The synchronization signal from the server 1 includes a horizontal synchronization signal and a vertical synchronization signal. The synchronization signal transmission unit 105 receives the synchronization signal from the synchronization signal reception unit 103 and outputs it to the monitor 5 via the video IF 113. The monitor 5 displays the video signal from the video amplifier 104 using the synchronization signal from the synchronization signal transmission unit 105.

  The differential driver 106 transmits the video signal from the video amplifier 102 and the synchronization signal from the synchronization signal receiving unit 103 as differential signals to the receiver 4 via the LANIF 114 and the LAN cable 7. At this time, the differential driver 106 may superimpose a synchronization signal on the video signal. The LAN cable 7 is a Cat (category) 5 cable, for example, and includes four pairs of twisted pair wires.

  The RS-485 transceiver 108 receives a control signal from the microcomputer 101 and transmits the control signal to the receiver 4 via the LANIF 114 and the LAN cable 7, or a control signal from the receiver 4 via the LANIF 114 and the LAN cable 7. Is transmitted to the microcomputer 101. The RS-485 transceiver 109 receives an operation signal or data from the receiver 4 via the LANIF 114 and the LAN cable 7 and transmits it to the USB module 107. The RS-485 transceiver 109 receives data from the USB module 107 and transmits data to the receiver 4 via the LANIF 114 and the LAN cable 7. The USB module 107 transmits and receives data between the server 1 and the RS-485 transceiver 109. The USB module 107 transmits various control signals to the microcomputer 101.

  The differential receiver 202 of the receiver 4 receives a differential signal including a video signal and a synchronization signal, and separates the video signal and the synchronization signal. The separated video signal is output to the delay line 203, and the separated synchronization signal is output to the synchronization signal output unit 206. In addition, the differential receiver 202 includes a low-pass filter 202A that cuts noise (high-frequency component) of the video signal. The differential receiver 202 adjusts the image quality of the video signal. Specifically, the differential receiver 202 adjusts the focus of the video signal (including the adjustment of the gain characteristic for each frequency of the video signal), adjusts the brightness of the video signal, and cuts the noise of the video signal. .

  The delay line 203 is a circuit that adjusts the color shift of the video signal, that is, the RGB signal. For example, the delay line 203 advances or delays the signal waveform of the R signal with respect to the signal waveforms of the B signal and the G signal.

  The offset correction circuit 204 is a circuit that corrects the output level of the black video signal to 0V. When the video signal is black, the signal level of each color of RGB is ideally 0V. However, even when the video signal is black, a voltage of about 0.2 V may appear as the output of the delay line 203. In this case, the video signal that is originally black becomes slightly gray. Therefore, the offset correction circuit 204 corrects the voltage of about 0.2V to 0V, that is, corrects the actual output voltage of the delay line 203 to an ideal output voltage.

  The video amplifier 205 amplifies the video signal received from the offset correction circuit 204 and outputs it to the monitor 6 via the video IF 213. The synchronization signal output unit 206 receives the synchronization signal from the differential receiver 202 and outputs it to the monitor 6 via the video IF 213. The monitor 6 displays the video signal from the video amplifier 205 using the synchronization signal from the synchronization signal output unit 206.

  The microcomputer 201 of the receiver 4 outputs a control signal for controlling the image quality of the video signal to the differential receiver 202 and the delay line 203. The microcomputer 201 controls lighting, extinguishing, and lighting color of each of the three color LEDs 218 to 220. Each of the three-color LEDs 218 to 220 can be lit in three colors of red, green, and blue. Further, the microcomputer 201 receives an on signal or an off signal from the select switch 221, the right switch 222, the left switch 223, the EDID switch 224, and the PC power switch 225. Further, the microcomputer 201 controls the sound output of the buzzer 209. The buzzer 209 outputs a buzzer sound in response to depression of the select switch 221, the right switch 222, the left switch 223, the EDID switch 224, and the PC power switch 225.

  The RS-485 transceiver 210 receives a control signal from the microcomputer 201 and transmits the control signal to the transmitter 3 via the LANIF 212 and the LAN cable 7, or a control signal from the transmitter 3 via the LANIF 212 and the LAN cable 7. Is transmitted to the microcomputer 201. The RS-485 transceiver 211 receives an operation signal or data from the transmitter 3 via the LANIF 212 and the LAN cable 7 and transmits it to the USB module 207. The RS-485 transceiver 211 receives data from the USB module 207 and transmits data to the transmitter 3 via the LANIF 212 and the LAN cable 7. The USB module 207 transmits and receives data between the USB hub controller 208 and the RS-485 transceiver 211. The USB module 207 transmits various control signals from a keyboard or mouse (not shown) to the microcomputer 201 via the USB IFs 214 to 217. The USB hub controller 208 is connected to a USB device (not shown) (for example, a keyboard, a mouse, and a USB memory) via the USB IFs 214 to 217, and executes reading and writing of data with respect to the USB device.

  The microcomputer 201 functions as first setting means for setting the image quality adjustment mode of the video signal, and the right switch 222 and the left switch 223 function as second setting means for setting the image quality adjustment value. The receiver 202 and the delay line 203 function as adjusting means for adjusting the image quality. Further, the delay line 203 functions as a moving means for moving the signal waveform. The three-color LEDs 218 to 220 function as light emitting means. The buzzer 209 functions as an audio output unit.

  FIG. 2 is a diagram illustrating a front panel of the receiver 4.

  The front panel of the receiver 4 includes a power LED 230, three-color LEDs 218 to 220, a select switch 221, a right switch 222, a left switch 223, a PC power switch 225, and USBIFs 214 to 217. The number of LEDs and switches is not limited to the example of FIG. Moreover, said LED and switch may be formed in the side surface or upper surface of the receiver 4. FIG. The power LED 230 is turned on when the receiver 4 is turned on, and turned off when the power is turned off. The three-color LEDs 218 to 220 are assigned names for identifying the LEDs “EQ / Skew”, “mode1”, and “mode2”, respectively.

  The operator adjusts the image quality of the video signal by operating the select switch 221, the right switch 222, the left switch 223, and the PC power switch 225 while viewing the colors of the three-color LEDs 218 to 220. The item of image quality adjustment includes focus of the video signal (including adjustment of gain characteristics for each frequency of the video signal), brightness of the video signal, color shift of the video signal, and noise cut of the video signal.

  The receiver 4 of the remote unit 10 according to the present embodiment has a normal setting mode as the first mode for roughly adjusting the image quality of the video signal as the adjustment mode of the image quality of the video signal, and the image quality of the video signal in detail. A detailed setting mode as a second mode to be adjusted.

  When the power of the receiver 4 is turned on and the select switch 221 is pressed during standby, the microcomputer 201 sets the image signal image quality adjustment mode to the normal setting mode. On the other hand, when the power of the receiver 4 is turned on and the select switch 221, the right switch 222, and the left switch 223 are pressed simultaneously during standby, the microcomputer 201 sets the image signal image quality adjustment mode to the detailed setting mode. Set. When the adjustment content in the normal setting mode or the detailed setting mode is confirmed, the receiver 4 returns to the standby state. Therefore, when the operator switches from the normal setting mode to the detailed setting mode, or when switching from the detailed setting mode to the normal setting mode, the adjustment contents in the normal setting mode or the detailed setting mode are once determined, that is, It is necessary to finish the adjustment.

  Hereinafter, the normal setting mode will be described.

  In the normal setting mode, the differential receiver 202 roughly adjusts the focus and brightness of the video signal in response to pressing of the right switch 222 or the left switch 223. Further, in the normal setting mode, the delay line 203 roughly adjusts the color shift of the video signal (that is, the RGB signal) in response to pressing of the right switch 222 or the left switch 223. In the normal setting mode, every time the select switch 221 is pressed, the buzzer 209 outputs a beep sound and the microcomputer 201 switches the adjustment mode of the focus, brightness, and color misregistration of the video signal. Specifically, the microcomputer 201 selects “focus adjustment mode” → “brightness adjustment mode” → “red color misalignment adjustment mode” → “green color misalignment adjustment mode” → “blue color misalignment adjustment mode” → “ Switch the adjustment mode in the order of “Confirmation of adjustment” → “Focus adjustment mode”.

  In the normal setting mode, the three-color LEDs 218 to 220 are turned on during the adjustment of the image quality of the video signal according to Table 1. Therefore, the operator can identify the setting mode by looking at the lighting colors of the three-color LEDs 218 to 220. Also, since the setting range (adjustment value range) by the right switch 222 or the left switch 223 is different for each setting mode, examples of the minimum value and the maximum value are shown in Table 1. The initial value of each setting mode is “0”. Further, Step in Table 1 indicates a fluctuation value per one press of the right switch 222 or the left switch 223. For example, in Table 1, when the right switch 222 is pressed once, the value of each setting mode is increased by 1, and when the left switch 223 is pressed once, the value of each setting mode is decreased by 1.

(1) Focus adjustment mode When the focus adjustment mode is selected, the differential receiver 202 focuses the video signal so that the image quality of the video signal becomes sharp in response to the right switch 222 or the left switch 223 being pressed. , Adjust the video signal gain). In the focus adjustment in the normal setting mode, the video signal is not gain-adjusted every predetermined frequency, and the video signal is uniformly adjusted regardless of the frequency. In the focus adjustment mode, the buzzer 209 outputs a buzzer sound every time the right switch 222 or the left switch 223 is pressed.

(2) Brightness Adjustment Mode When the brightness adjustment mode is selected, the differential receiver 202 adjusts the brightness of the video signal in response to the right switch 222 or the left switch 223 being pressed. In the brightness adjustment in the normal setting mode, the brightness of the R signal, the G signal, and the B signal, which are video signals, is not adjusted for each color but is adjusted uniformly. In the brightness adjustment mode, the buzzer 209 outputs a buzzer sound every time the right switch 222 or the left switch 223 is pressed.

(3) Color shift adjustment mode Since the color to be adjusted (red, green, or blue) is switched by pressing the select switch 221, the operator can adjust the color shift for each color. When the right switch 222 is pressed after the operator selects a color to be adjusted, the delay line 203 moves the signal waveform of the selected color to the right. When the operator selects a color to be adjusted and then presses the left switch 223, the delay line 203 moves the signal waveform of the selected color to the left. In the color shift adjustment mode, the buzzer 209 outputs a buzzer sound every time the right switch 222 or the left switch 223 is pressed. 3A is a diagram illustrating signal waveforms of video signals (R signal, G signal, and B signal) before color misregistration adjustment, and FIG. 3B is a diagram illustrating a video signal (R signal after color misregistration adjustment). , G signal and B signal). In FIG. 3B, the color shift of the G signal is adjusted. The G signal moves to the right with respect to the R signal and the B signal, and is delayed in time from the R signal and the B signal. 3A and 3B, the vertical axis indicates the signal level (that is, voltage), and the horizontal axes in FIGS. 3A and 3B indicate time.

(4) Confirmation of adjustment When the select switch 221 is pressed after the “blue color misalignment adjustment mode”, the content of adjustment is confirmed. When the select switch 221 is pressed, the buzzer 209 outputs a buzzer sound “beep” so that the operator can recognize that the adjustment content has been set in the microcomputer 201.

  4 and 5 are flowcharts showing the operation processing in the normal setting mode.

  First, the receiver 4 is turned on, and the receiver 4 is in a standby state (step S1). When the operator presses the select switch 221, the microcomputer 201 sets the image quality adjustment mode of the video signal to the normal setting mode (step S2). Then, the microcomputer 201 enters the focus adjustment mode, and the three-color LED 218 (EQ / Skew) is lit in green, and the three-color LED 219 (mode1) is lit in red (step S3).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 has been pressed (step S4). If the right switch 222 or the left switch 223 is not pressed (NO in step S4), the procedure proceeds to step S7. When the right switch 222 or the left switch 223 is pressed (YES in step S4), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the focus of the video signal based on the control signal corresponding to the pressing of the right switch 222 or the left switch 223 (step S5). In the focus adjustment, focus adjustment of the R signal, the G signal, and the B signal, which are video signals, is performed simultaneously.

  Thereafter, the operator determines whether or not the image quality of the video signal has become sharp (step S6). If the operator determines that the image quality of the video signal is not sharp (NO in step S6), the procedure returns to step S4. On the other hand, if the operator determines that the image quality of the video signal has become sharp (YES in step S6), the procedure proceeds to step S7.

  When the operator depresses the select switch 221 (step S7), the microcomputer 201 enters the brightness adjustment mode, the three-color LED 218 (EQ / Skew) is lit in green, and the three-color LED 219 (mode1) is lit in green. (Step S8).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S9). If the right switch 222 or the left switch 223 is not pressed (NO in step S9), the procedure proceeds to step S12. When the right switch 222 or the left switch 223 is pressed (YES in step S9), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the brightness of the video signal based on a control signal in response to pressing of the right switch 222 or the left switch 223 (step S10). In the brightness adjustment, the brightness adjustment of the R signal, the G signal, and the B signal, which are video signals, is executed simultaneously.

  Thereafter, the operator determines whether or not the brightness of the video signal has become appropriate (step S11). If the operator determines that the brightness of the video signal is not appropriate (NO in step S11), the procedure returns to step S9. On the other hand, when the operator determines that the brightness of the video signal has become appropriate (YES in step S11), the procedure proceeds to step S12.

  Next, when the operator depresses the select switch 221 (step S12), the microcomputer 201 enters a red color misregistration adjustment mode and lights the three-color LED 218 (EQ / Skew) in red, and the three-color LED 219 (mode1 ) Is lit red (step S13).

  The microcomputer 201 determines whether or not the right switch 222 or the left switch 223 is pressed (step S14). If the right switch 222 or the left switch 223 is not pressed (NO in step S14), the procedure proceeds to step S17. When the right switch 222 or the left switch 223 is pressed (YES in step S14), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the delay line 203. Moves the red signal waveform based on the control signal in response to pressing of the right switch 222 or the left switch 223 (step S15).

  Thereafter, the operator determines whether or not there is a red color shift (step S16). If the operator determines that there is a red color shift (YES in step S16), the procedure returns to step S14. On the other hand, if the operator determines that there is no red color shift (NO in step S16), the procedure proceeds to step S17.

  Next, when the operator depresses the select switch 221 (step S17), the microcomputer 201 enters a green color misregistration adjustment mode and lights the three-color LED 218 (EQ / Skew) in red, and the three-color LED 219 (mode1 ) Is lit in green (step S18).

  The microcomputer 201 determines whether or not the right switch 222 or the left switch 223 is pressed (step S19). If the right switch 222 or the left switch 223 has not been pressed (NO in step S19), the procedure proceeds to step S22. When the right switch 222 or the left switch 223 is pressed (YES in step S19), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the delay line 203. Moves the green signal waveform based on the control signal in response to pressing of the right switch 222 or the left switch 223 (step S20).

  Thereafter, the operator determines whether or not there is a green color shift (step S21). If the operator determines that there is a green color shift (YES in step S21), the procedure returns to step S19. On the other hand, if the operator determines that there is no green color shift (NO in step S21), the procedure proceeds to step S22.

  Next, when the operator depresses the select switch 221 (step S22), the microcomputer 201 enters a blue color misregistration adjustment mode and lights the three-color LED 218 (EQ / Skew) in red, and the three-color LED 219 (mode1 ) Is lit in blue (step S23).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S24). If the right switch 222 or the left switch 223 has not been pressed (NO in step S24), the procedure proceeds to step S27. When the right switch 222 or the left switch 223 is pressed (YES in step S24), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the delay line 203. Moves the blue signal waveform based on the control signal in response to pressing of the right switch 222 or the left switch 223 (step S25).

  Thereafter, the operator determines whether or not there is a blue color shift (step S26). If the operator determines that there is a blue color shift (YES in step S26), the procedure returns to step S24. On the other hand, if the operator determines that there is no blue color shift (NO in step S26), the procedure proceeds to step S27.

  Next, when the operator depresses the select switch 221 (step S27), the microcomputer 201 confirms the adjustment contents and turns off the three-color LED 218 (EQ / Skew) and the three-color LED 219 (mode1) (step S28). ). Thereafter, the receiver 4 enters a standby state (step S29), and this process is terminated.

  Next, the detailed setting mode will be described.

  In the detailed setting mode, when the right receiver 222 or the left switch 223 is pressed, the differential receiver 202 focuses the video signal (gain adjustment for each frequency), brightness (brightness for each color), and noise (low-pass filter 202A). Adjust the cutoff frequency in detail. In the detailed setting mode, each time the select switch 221 is pressed, the buzzer 209 outputs a buzzer sound “beep”, and the microcomputer 201 switches the adjustment mode of the focus, brightness, and noise of the video signal. Specifically, the microcomputer 201 selects “frequency gain adjustment mode (100 MHz Stage 1)” → “frequency gain adjustment mode (100 MHz Stage 2)” → “frequency gain adjustment mode (100 MHz Stage 3)” → “frequency gain adjustment mode (6 MHz)”. → “Frequency gain adjustment mode (20 MHz)” → “Frequency gain adjustment mode (200 kHz)” → “Frequency gain adjustment mode (1 MHz)” → “Red brightness adjustment mode” → “Green brightness adjustment mode” → Switch the adjustment mode in the order of “Blue brightness adjustment mode” → “Noise filter”.

  In the detailed setting mode, the three-color LEDs 218 to 220 are turned on during the adjustment of the image quality of the video signal according to Table 2. Therefore, the operator can identify the setting mode by looking at the lighting colors of the three-color LEDs 218 to 220. Further, since the setting range (adjustment value range) by the right switch 222 or the left switch 223 is different for each setting mode, examples of the minimum value and the maximum value are shown in Table 2. The initial value of each setting mode is “0”. Further, Step in Table 2 indicates a fluctuation value per one press of the right switch 222 or the left switch 223. For example, in Table 2, when the right switch 222 is pressed once, the value of each setting mode is increased by 1, and when the left switch 223 is pressed once, the value of each setting mode is decreased by 1.

(1) Frequency gain adjustment mode When the operator adjusts the gain characteristic for each frequency, the operator presses the select switch 221 and selects the frequency to be adjusted. When the frequency to be adjusted is selected, the differential receiver 202 changes the current gain characteristic to a gain characteristic that increases the signal level at that frequency in response to pressing of the right switch 222. Similarly, the differential receiver 202 changes the current gain characteristic to a gain characteristic that decreases the signal level at that frequency in response to pressing of the left switch 223. In the frequency gain adjustment mode, the buzzer 209 outputs a buzzer sound every time the right switch 222 or the left switch 223 is pressed.

  For example, FIG. 6A is a diagram illustrating signal waveforms of video signals (R signal, G signal, and B signal) before gain adjustment, and FIG. 6B illustrates a video signal (R signal after gain adjustment). , G signal and B signal). The left waveform P1 in FIG. 6A shows one thin line, and the right waveform P2 in FIG. 6A shows one thick line. FIG. 6B shows a state in which the right switch 222 is pressed and the gain characteristic of FIG. 6A is changed to a gain characteristic that increases the signal level. In FIG. 6B, since the gain characteristic is changed to the gain characteristic that increases the signal level, the edge E1 of the waveform P1 and the edge E2 of the waveform P2 are increased. That is, the signal level in the high frequency band is increased, and as a result, the outline of the thin line or the thick line is emphasized, and the image quality is sharpened.

  Further, in Stages 1 to 3 in the frequency gain adjustment mode, gain characteristics obtained around 100 MHz are different. FIGS. 7A to 7C are diagrams illustrating the relationship between the frequency and amplitude (that is, gain characteristics) corresponding to Stages 1 to 3, respectively. 7A to 7C, the horizontal axis indicates the frequency, and the vertical axis indicates the amplitude. In Stage 1 in FIG. 7A, four types of gain characteristics can be selected including gain characteristics without level change (still 0 dB). In Stage 2 in FIG. 7B, eight types of gain characteristics can be selected including gain characteristics without level change (still 0 dB). Stage 2 also includes a gain characteristic in which the amplitude decreases when the frequency exceeds 100 MHz. In Stage 3 in FIG. 7C, eight types of gain characteristics can be selected including the gain characteristics without level change (still 0 dB). Further, in Stage 3 in FIG. 7C, a gain characteristic larger than that of Stage 1 and Stage 2 is obtained.

(2) Brightness adjustment mode When the operator adjusts the brightness, the operator presses the select switch 221 and selects the color of the signal to be adjusted. When the color to be adjusted is selected, the differential receiver 202 adjusts the brightness of the video signal in response to the right switch 222 or the left switch 223 being pressed. In the brightness adjustment mode, the buzzer 209 outputs a buzzer sound every time the right switch 222 or the left switch 223 is pressed.

  For example, FIG. 8A is a diagram illustrating signal waveforms of video signals (R signal, G signal, and B signal) before brightness adjustment, and FIG. 8B illustrates a video signal after brightness adjustment ( It is a figure which shows the signal waveform of R signal, G signal, and B signal. In FIG. 8B, the brightness of the R signal is adjusted, and the signal level of the R signal is increased.

(3) Noise filter mode When the operator reduces noise (for example, flickering of the screen), the operator presses the select switch 221 and selects the noise filter mode. When the noise filter mode is selected, the differential receiver 202 increases the cutoff frequency of the signal passed through the low-pass filter 202A in response to the pressing of the right switch 222. Similarly, the differential receiver 202 lowers the cutoff frequency of the signal passed through the low-pass filter 202A in response to the pressing of the left switch 223. In the noise filter mode, the buzzer 209 outputs a buzzer sound every time the right switch 222 or the left switch 223 is pressed.

  For example, FIG. 9A is a diagram illustrating a signal waveform of a video signal (R signal, G signal, and B signal) before noise adjustment, and FIG. 9B is a video signal (R signal after noise adjustment). , G signal and B signal). In FIG. 9B, the cut-off frequency of the signal passed through the low-pass filter 202A is lowered. Therefore, the ripple portion (fine waveform) of each signal waveform is smooth, and the signal level in the high frequency band (for example, the edge E1 of the waveform P1 and the edge E2 of the waveform P2) is lowered.

(4) Confirmation of Adjustment When the PC power switch 225 is pressed, the microcomputer 201 turns off the three-color LEDs 218 to 220, confirms the details of adjustment, and ends the detailed setting mode. When the PC power switch 225 is pressed, the buzzer 209 outputs a buzzer sound “beep”, so that the operator can recognize that the adjustment content has been set in the microcomputer 201.

  10 to 13 are flowcharts showing the operation processing in the detailed setting mode.

  First, the receiver 4 is turned on, and the receiver 4 is in a standby state (step S31). When the operator simultaneously presses the right switch 222, the left switch 223, and the select switch 221, the microcomputer 201 sets the image signal image quality adjustment mode to the detailed setting mode (step S32).

  Then, the microcomputer 201 enters the frequency gain adjustment mode (100 MHz Stage 1), lights the three-color LED 218 (EQ / Skew) in blue, and lights the three-color LED 219 (mode 1) and the three-color LED 220 (mode 2) in red ( Step S33).

  The microcomputer 201 determines whether or not the right switch 222 or the left switch 223 is pressed (step S34). If the right switch 222 or the left switch 223 has not been pressed (NO in step S34), the procedure proceeds to step S37. When the right switch 222 or the left switch 223 is pressed (YES in Step S34), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 performs gain adjustment of the video signal based on the control signal in response to the pressing of the right switch 222 or the left switch 223 (step S35). For example, when the current gain characteristic is the gain characteristic without level change (0 dB) shown in FIG. 7A and the right switch 222 is pressed, the differential receiver 202 is connected to the right switch 222. The gain adjustment of the video signal is executed according to any one of the other three gain characteristics shown in FIG. For example, when the current gain characteristic is the maximum gain characteristic shown in FIG. 7A and the left switch 223 is pressed, the differential receiver 202 corresponds to the pressing of the left switch 223. FIG. The gain adjustment of the video signal is executed according to any one of the other three gain characteristics shown in FIG. In the gain adjustment, adjustment of the R signal, the G signal, and the B signal, which are video signals, is performed simultaneously.

  Thereafter, the operator determines whether or not the image quality of the video signal has become sharp (step S36). If the operator determines that the image quality of the video signal is not sharp (NO in step S36), the procedure returns to step S34. On the other hand, if the operator determines that the image quality of the video signal has become sharp (YES in step S36), the procedure proceeds to step S37. If the PC power switch 225 is pressed in the case of NO in step S34 and in the case of YES in step S36, the microcomputer 201 turns off the three-color LEDs 218 to 220 (EQ / Skew, mode1, and mode2) and changes the adjustment contents. The detailed setting mode is terminated (step S89). Thereafter, the receiver 4 enters a standby state (step S90), and this process ends.

  Next, when the operator depresses the select switch 221 (step S37), the microcomputer 201 enters the frequency gain adjustment mode (100 MHz Stage 2) and lights the three-color LED 218 (EQ / Skew) in blue, and the three-color LED 219. (Mode1) is lit red, and the three-color LED 220 (mode2) is lit green (step S38).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S39). If the right switch 222 or the left switch 223 has not been pressed (NO in step S39), the procedure proceeds to step S42. When the right switch 222 or the left switch 223 is pressed (YES in step S39), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 performs gain adjustment of the video signal based on the control signal in response to the pressing of the right switch 222 or the left switch 223 (step S40). For example, when the current gain characteristic is the gain characteristic without level change (0 dB) shown in FIG. 7B and the right switch 222 is pressed, the differential receiver 202 is connected to the right switch 222. The gain adjustment of the video signal is executed according to any one of the other seven gain characteristics shown in FIG. For example, when the current gain characteristic is the maximum gain characteristic shown in FIG. 7B and the left switch 223 is pressed, the differential receiver 202 corresponds to the pressing of the left switch 223. FIG. The gain adjustment of the video signal is executed according to any one of the other seven gain characteristics shown in FIG. In the gain adjustment, adjustment of the R signal, the G signal, and the B signal, which are video signals, is performed simultaneously.

  Thereafter, the operator determines whether or not the image quality of the video signal has become sharp (step S41). If the operator determines that the image quality of the video signal is not sharp (NO in step S41), the procedure returns to step S39. On the other hand, if the operator determines that the image quality of the video signal has become sharp (YES in step S41), the procedure proceeds to step S42. If the PC power switch 225 is pressed in the case of NO in step S39 and in the case of YES in step S41, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S42), the microcomputer 201 enters the frequency gain adjustment mode (100 MHz Stage 3) and lights the three-color LED 218 (EQ / Skew) in blue, and the three-color LED 219. (Mode1) is lit red, and the three-color LED 220 (mode2) is lit blue (step S43).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S44). If the right switch 222 or the left switch 223 is not pressed (NO in step S44), the procedure proceeds to step S47. When the right switch 222 or the left switch 223 is pressed (YES in Step S44), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 performs gain adjustment of the video signal based on the control signal in response to the pressing of the right switch 222 or the left switch 223 (step S45). For example, when the current gain characteristic is the gain characteristic without level change (0 dB) shown in FIG. 7C and the right switch 222 is pressed, the differential receiver 202 is connected to the right switch 222. The gain adjustment of the video signal is executed according to any one of the other seven gain characteristics shown in FIG. For example, when the current gain characteristic is the maximum gain characteristic shown in FIG. 7C and the left switch 223 is pressed, the differential receiver 202 corresponds to the pressing of the left switch 223. FIG. The gain adjustment of the video signal is executed according to any one of the other seven gain characteristics shown in (C). In the gain adjustment, adjustment of the R signal, the G signal, and the B signal, which are video signals, is performed simultaneously.

  Thereafter, the operator determines whether or not the image quality of the video signal has become sharp (step S46). If the operator determines that the image quality of the video signal is not sharp (NO in step S46), the procedure returns to step S44. On the other hand, if the operator determines that the image quality of the video signal has become sharp (YES in step S46), the procedure proceeds to step S47. If NO in step S44 and YES in step S46, if PC power switch 225 is pressed, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S47), the microcomputer 201 enters the frequency gain adjustment mode (6 MHz) and lights the three-color LED 218 (EQ / Skew) in blue, and the three-color LED 219 ( mode1) is lit in green, and the three-color LED 220 (mode2) is lit in red (step S48).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S49). If the right switch 222 or the left switch 223 has not been pressed (NO in step S49), the procedure proceeds to step S52. When the right switch 222 or the left switch 223 is pressed (YES in step S49), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the gain of the video signal based on the control signal corresponding to the pressing of the right switch 222 or the left switch 223 (step S50). The differential receiver 202 has data for adjusting the gain characteristic of 6 MHz in advance.

  Thereafter, the operator determines whether or not the image quality of the video signal has become sharp (step S51). If the operator determines that the image quality of the video signal is not sharp (NO in step S51), the procedure returns to step S49. On the other hand, if the operator determines that the image quality of the video signal has become sharp (YES in step S51), the procedure proceeds to step S52. If the PC power switch 225 is pressed in the case of NO in step S49 and YES in step S51, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S52), the microcomputer 201 enters the frequency gain adjustment mode (20 MHz) and lights the three-color LED 218 (EQ / Skew) in blue, and the three-color LED 219 ( mode1) and the three-color LED 220 (mode2) are lit in green (step S53).

  The microcomputer 201 determines whether or not the right switch 222 or the left switch 223 is pressed (step S54). If the right switch 222 or the left switch 223 has not been pressed (NO in step S54), the procedure proceeds to step S57. When the right switch 222 or the left switch 223 is pressed (YES in step S54), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the gain of the video signal based on the control signal corresponding to the pressing of the right switch 222 or the left switch 223 (step S55). The differential receiver 202 has data for adjusting the gain characteristic of 20 MHz in advance.

  Thereafter, the operator determines whether or not the image quality of the video signal has become sharp (step S56). If the operator determines that the image quality of the video signal is not sharp (NO in step S56), the procedure returns to step S54. On the other hand, if the operator determines that the image quality of the video signal has become sharp (YES in step S56), the procedure proceeds to step S57. If NO in step S54 and YES in step S56, if PC power switch 225 is pressed, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S57), the microcomputer 201 enters the frequency gain adjustment mode (200 kHz) and lights the three-color LED 218 (EQ / Skew) in blue, and the three-color LED 219 ( mode1) is lit in green, and the three-color LED 220 (mode2) is lit in blue (step S58).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S59). If the right switch 222 or the left switch 223 has not been pressed (NO in step S59), the procedure proceeds to step S62. When the right switch 222 or the left switch 223 is pressed (YES in step S59), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the gain of the video signal based on the control signal corresponding to the pressing of the right switch 222 or the left switch 223 (step S60). The differential receiver 202 has data for adjusting the gain characteristic of 200 kHz in advance.

  Thereafter, the operator determines whether or not the image quality of the video signal has become sharp (step S61). If the operator determines that the image quality of the video signal is not sharp (NO in step S61), the procedure returns to step S59. On the other hand, if the operator determines that the image quality of the video signal has become sharp (YES in step S61), the procedure proceeds to step S62. If NO in step S59 and YES in step S61, if PC power switch 225 is pressed, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S62), the microcomputer 201 enters the frequency gain adjustment mode (1 MHz), and the three-color LED 218 (EQ / Skew) and the three-color LED 219 (mode1) turn blue. The three-color LED 220 (mode 2) is lit red (step S63).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S64). If the right switch 222 or the left switch 223 has not been pressed (NO in step S64), the procedure proceeds to step S67. When the right switch 222 or the left switch 223 is pressed (YES in step S64), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the gain of the video signal based on the control signal corresponding to the pressing of the right switch 222 or the left switch 223 (step S65). The differential receiver 202 has data for adjusting the gain characteristic of 1 MHz in advance.

  Thereafter, the operator determines whether or not the image quality of the video signal has become sharp (step S66). If the operator determines that the image quality of the video signal is not sharp (NO in step S66), the procedure returns to step S64. On the other hand, if the operator determines that the image quality of the video signal has become sharp (YES in step S66), the procedure proceeds to step S67. If NO in step S64 and YES in step S66, if PC power switch 225 is pressed, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S67), the microcomputer 201 enters the red brightness adjustment mode and lights the three-color LED 218 (EQ / Skew) in blue, and the three-color LED 219 (mode1). ) Is turned off, and the three-color LED 220 (mode 2) is lit red (step S68).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S69). If the right switch 222 or the left switch 223 has not been pressed (NO in step S69), the procedure proceeds to step S72. When the right switch 222 or the left switch 223 is pressed (YES in step S69), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the brightness of the video signal based on the control signal corresponding to the pressing of the right switch 222 or the left switch 223 (step S70).

  Thereafter, the operator determines whether or not the brightness of the video signal is appropriate (step S71). If the operator determines that the brightness of the video signal is not appropriate (NO in step S71), the procedure returns to step S69. On the other hand, when the operator determines that the brightness of the video signal has become appropriate (YES in step S71), the procedure proceeds to step S72. If the PC power switch 225 is pressed in the case of NO in step S69 and in the case of YES in step S71, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S72), the microcomputer 201 enters the green brightness adjustment mode and lights the three-color LED 218 (EQ / Skew) in blue, and the three-color LED 219 (mode1). ) Is turned off, and the three-color LED 220 (mode 2) is lit in green (step S73).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S74). If the right switch 222 or the left switch 223 has not been pressed (NO in step S74), the procedure proceeds to step S77. When the right switch 222 or the left switch 223 is pressed (YES in Step S74), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the brightness of the video signal based on the control signal corresponding to the pressing of the right switch 222 or the left switch 223 (step S75).

  Thereafter, the operator determines whether or not the brightness of the video signal has become appropriate (step S76). If the operator determines that the brightness of the video signal is not appropriate (NO in step S76), the procedure returns to step S74. On the other hand, when the operator determines that the brightness of the video signal has become appropriate (YES in step S76), the procedure proceeds to step S77. If the PC power switch 225 is pressed in the case of NO in step S74 and in the case of YES in step S76, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S77), the microcomputer 201 enters the blue brightness adjustment mode and lights the three-color LED 218 (EQ / Skew) in blue, and the three-color LED 219 (mode1). ) Is turned off, and the three-color LED 220 (mode 2) is lit in blue (step S78).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S79). If the right switch 222 or the left switch 223 has not been pressed (NO in step S79), the procedure proceeds to step S82. When the right switch 222 or the left switch 223 is pressed (YES in step S79), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 adjusts the brightness of the video signal based on a control signal in response to pressing of the right switch 222 or the left switch 223 (step S80).

  Thereafter, the operator determines whether or not the brightness of the video signal has become appropriate (step S81). If the operator determines that the brightness of the video signal is not appropriate (NO in step S81), the procedure returns to step S79. On the other hand, when the operator determines that the brightness of the video signal has become appropriate (YES in step S81), the procedure proceeds to step S82. If the PC power switch 225 is pressed in the case of NO in step S79 and in the case of YES in step S81, the procedure proceeds to step S89.

  Next, when the operator depresses the select switch 221 (step S82), the microcomputer 201 enters the noise filter mode, and the three-color LED 218 (EQ / Skew) and the three-color LED 219 (mode1) are lit in blue. The color LED 220 (mode 2) is lit in green (step S83).

  The microcomputer 201 determines whether the right switch 222 or the left switch 223 is pressed (step S84). When the right switch 222 or the left switch 223 is not pressed (NO in step S84), when the operator presses the select switch 221 (step S87), the procedure returns to step S33. On the other hand, when the right switch 222 or the left switch 223 is not pressed (NO in step S84), if the operator presses the PC power switch 225 (step S88), the procedure proceeds to step S89.

  When the right switch 222 or the left switch 223 is pressed (YES in step S84), the microcomputer 201 outputs a control signal corresponding to the pressing of the right switch 222 or the left switch 223 to the differential receiver 202, and the differential The receiver 202 sets the cut-off frequency of the low-pass filter 202A based on the control signal in response to pressing of the right switch 222 or the left switch 223, and removes the noise of the video signal (step S85).

  Thereafter, the operator determines whether or not the noise of the video signal has decreased (step S86). If the operator determines that the noise of the video signal has not decreased (NO in step S86), the procedure returns to step S84. On the other hand, when the operator determines that the noise of the video signal has decreased (YES in step S86), the procedure proceeds to step S87 or step S88.

  In the present embodiment, the receiver 4 includes the buzzer 209 that outputs a buzzer sound of “beep”, but may include a speaker that outputs sound instead of the buzzer 209. For example, this speaker outputs the mode name of the change destination, such as “changed to brightness adjustment mode” and “brightness has increased by one step”, and changes to the adjustment values of each parameter May be output. Further, the buzzer 209 outputs a buzzer sound when changing the mode, when changing the adjustment value of each parameter, and when confirming the adjustment. For example, when confirming the adjustment, the buzzer 209 outputs the adjustment value of each parameter when the mode is changed. You may make it output a buzzer sound longer than the time of a change. Thereby, the operator can easily grasp that the adjustment content has been set.

  As described above, according to the present embodiment, the receiver 4 adjusts the image quality of the video signal from the server 1 and the details of adjusting the image quality of the video signal in more detail than the normal setting mode. The microcomputer 201 that sets any one of the setting modes as an adjustment mode of the image quality of the video signal, the right switch 222 and the left switch 223 that set the adjustment value of the image quality of the video signal, and the adjustment mode set by the microcomputer 201 In addition, a differential receiver 202 and a delay line 203 that adjust the image quality of the video signal according to the adjustment values set by the right switch 222 and the left switch 223 are provided. Therefore, the receiver 4 can adjust the image quality of the video signal from the server 1 in detail. In the normal setting mode, the image quality can be roughly adjusted, so that a point where the image quality of the video signal is good can be found in a short time.

  In the present embodiment, the three-color LEDs 218 to 220 change the lighting and extinguishing states and lighting colors for each of the focus adjustment, brightness adjustment, color shift adjustment, and noise deletion items. It is possible to easily recognize which item is being adjusted. Further, the lighting and extinguishing states and lighting colors of the three-color LEDs 218 to 220 in the normal setting mode are different from the lighting and extinguishing states and lighting colors of the three-color LEDs 218 to 220 in the detailed setting mode. Can easily recognize whether the item in the normal setting mode is adjusted or the item in the detailed setting mode is adjusted. Further, every time the select switch 221, right switch 222, left switch 223 or PC power switch 225 is pressed, the buzzer 209 outputs a buzzer sound, so that the operator can easily confirm that each switch has been pressed. .

  The present invention is not limited to the above-described embodiment, and can be implemented with various modifications within a range not departing from the gist thereof.

1 Server 3 Transmitter 4 Receiver 5, 6 Monitor 10 Remote Unit 201 Microcomputer 202 Differential Receiver 203 Delay Line 209 Buzzer 218-220 3-color LED
221 Select switch 222 Right switch 223 Left switch 225 PC power switch

Claims (6)

Either the first mode for adjusting the image quality of the video signal from the server or the second mode for adjusting the image quality of the video signal in more detail than the first mode is set as the image quality adjustment mode of the video signal. First setting means for setting;
Second setting means for setting an adjustment value of the image quality of the video signal;
Adjusting means for adjusting the image quality of the video signal in accordance with the adjustment mode set by the first setting means and the adjustment value set by the second setting means;
A remote unit comprising: The adjusting means uniformly adjusts the gain of the video signal according to the adjustment value set by the second setting means when the first mode is set by the first setting means,
When the second mode is set by the first setting means, the gain of the video signal is adjusted for each predetermined frequency of the video signal according to the adjustment value set by the second setting means. The remote unit according to claim 1. The adjusting means uniformly adjusts the brightness of the video signal according to the adjustment value set by the second setting means when the first mode is set by the first setting means,
When the second mode is set by the first setting means, the brightness of the video signal is adjusted for each color according to the adjustment value set by the second setting means. The remote unit according to claim 1 or 2.   The adjusting means moves the waveform of the video signal for each color in accordance with the adjustment value set by the second setting means when the first mode is set by the first setting means. The remote unit according to any one of claims 1 to 3, further comprising: The adjustment means includes a low-pass filter that changes a cutoff frequency according to the adjustment value set by the second setting means,
5. The remote unit according to claim 1, wherein, when the second mode is set by the first setting unit, the low-pass filter removes noise of the video signal. 6.   6. The remote according to claim 1, further comprising a plurality of light emitting means for changing a lighting and extinguishing state and a lighting color according to the adjustment contents of the image quality by the adjusting means. unit.

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