WO2001006485A1 - Systeme de controle de distribution et d'affichage video - Google Patents

Systeme de controle de distribution et d'affichage video Download PDF

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Publication number
WO2001006485A1
WO2001006485A1 PCT/JP2000/004856 JP0004856W WO0106485A1 WO 2001006485 A1 WO2001006485 A1 WO 2001006485A1 JP 0004856 W JP0004856 W JP 0004856W WO 0106485 A1 WO0106485 A1 WO 0106485A1
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WO
WIPO (PCT)
Prior art keywords
video
control
display
image
distribution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2000/004856
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English (en)
Japanese (ja)
Inventor
Keizo Nakano
Hitoshi Mitou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KYOUSAN SYSTEM CO Ltd
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KYOUSAN SYSTEM CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KYOUSAN SYSTEM CO Ltd filed Critical KYOUSAN SYSTEM CO Ltd
Priority to AU60210/00A priority Critical patent/AU6021000A/en
Publication of WO2001006485A1 publication Critical patent/WO2001006485A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division

Definitions

  • the present invention relates to a video information display system using a plurality of video monitors, and more specifically to controlling a plurality of video control devices using video signals from one control video generation device,
  • the present invention relates to a video distribution and display control system for displaying a desired video on a video monitor connected to a video control device.
  • a dedicated video generation device is provided for each video monitor, and these multiple video generation devices are controlled by one video management device.
  • a video generator for each video monitor, different videos can be displayed on each video monitor.
  • Such a system can be used in advanced ways such as displaying different images for each video monitor or expressing one video on the entire video monitor.
  • video signals used for video monitors are used as control signals for various purposes.
  • An analog TV broadcast video signal consists of a video signal portion displayed on the TV screen and a blanking period for display control, and the blanking period includes a vertical blanking period and a horizontal blanking period. It is divided into periods. Then, a control signal for operating the broadcasting station and the like are transmitted while being superimposed on the horizontal scanning line signal in the vertical blanking period.
  • a video signal of a television as a control signal
  • a method of using a video signal having a special pattern as a criterion for selecting a specific video there is a method of using a video signal having a special pattern as a criterion for selecting a specific video.
  • Such a control signal can be easily created because it can be configured as a television image, but in this case, it is used to select a specific image.
  • FIG. 1 is a configuration diagram of a video distribution and display control system.
  • FIG. 2 is a configuration diagram of a conventional system for displaying the same video on a plurality of video monitors.
  • FIG. 3 is a configuration diagram of a conventional system for displaying different images on a plurality of image monitors.
  • FIG. 4 shows a control video generation device.
  • Fig. 5 shows the image control device.
  • FIG. 6 is a configuration diagram of a control image.
  • FIG. 7 is an example of a combined continuous video sequence of a control video and a display video.
  • FIG. 8 shows a video control apparatus in which a character signal generation and superimposition section is added to a video output section.
  • FIG. 9 shows a video selective storage and display device having a first video input and a second video input.
  • FIG. 10 shows a video control device to which a relay unit for controlling the power supply of a video monitor is added.
  • FIG. 11 shows a video control device to which a second video generation device is added.
  • FIG. 12 shows a video control device to which an audio control unit is added.
  • FIG. 13 shows a video control device to which an audio storage / playback unit is added.
  • FIG. 14 is a configuration diagram when radio waves are used for a transmission path between the control video generation device and the video control device.
  • FIG. 15 shows a video control device when radio waves are used for transmission with the control video generation device.
  • a system that simultaneously displays the same image on multiple video monitors via a distributor from the image from one image generation device can be easily constructed, and the image to be displayed by simply changing the image of the image generation device is displayed. Can be changed in a timely manner.
  • a system that displays different images on multiple video monitors requires a device that controls the images displayed on each video monitor and manages the overall image display.
  • the cost is increased accordingly.
  • Images to be displayed on a TV can be easily created and transmitted by a video camera or digital camera.However, a special device is required to superimpose control signals on horizontal scanning lines during the blanking interval, and display on a TV There is a problem that more complicated devices and procedures are required to perform synchronization control with the synchronized video.
  • program specification information PSI
  • SI service information
  • the present invention provides a video information service system using a plurality of video monitors, which makes it easy to control display of a specific still image or moving image and control of audio for each video monitor. It is an object of the present invention to provide a system that can be used in a computer. Another object of the present invention is to provide a system that can easily control attached devices, which is necessary for providing more effective video information services.
  • the video distribution and display control system includes a control video generation device, a plurality of video control devices, a plurality of video monitors, the control video generation device, the plurality of video control devices, and each of the plurality of video monitors. It consists of a video transmission path between them.
  • the video output by the control video generator consists of two types: a display video displayed on a video monitor, and a control video consisting of an identification number specifying the video control device and a control command.
  • the control video generation device arranges the display video after the control video and continuously transmits it using the same video transmission line, so that the control video and the display video are transmitted to the multiple video control devices connected to this video transmission line. Distribute.
  • the video control device detects the control video received from the control video generation device, analyzes the identification number and the content of the control command, and stores the video according to the content of the control command when the identification number is addressed to its own station. Play back and display on the video monitor.
  • the system of the present invention includes a control video generation device, a plurality of video control devices, a plurality of video monitors, the control video generation device, the plurality of video control devices, and the video of each of the plurality of video monitors. It consists of a transmission line, but if multiple video controllers cannot be connected to the video transmission line, a distributor is installed on the output video transmission line of the control video generation device, and video control is performed on the output video transmission line of the distributor. The device is connected.
  • the control video generation device outputs a control video and a display video for controlling the video control device to a video transmission path.
  • Video devices such as video CDs and DVDs can be used.
  • the video control device analyzes the control video received from the video transmission path and performs a specified control operation. For example, when receiving a control video specifying the video control device, the video control device analyzes the control command. If the control command is a command to store the subsequent image in the storage unit and display it, the image control device receives the subsequently transmitted display image, and stores the display image in the frame memory or the magnetic disk. The data is stored and stored in the device, etc., and played back.
  • the video transmission path is used when the video signal is transmitted as a baseband electrical signal, when it is transmitted after being modulated into an analog or digital television signal, or when a laser beam or infrared light is transmitted.
  • a metal wire transmission line, a radio wave transmission line, an optical fiber transmission line, and an infrared transmission line are used according to the video signal transmission form.
  • the control video is configured using the video display portion of the video signal. If the video is an NTSC-type television video, a frame signal of one screen is composed of 525 horizontal scanning lines in television broadcasting. This one-frame video is displayed as one screen on the TV screen by a skip operation using a two-field video screen.
  • the first odd field that constitutes one frame consists of the first horizontal scanning line signal to the first half of the 26th horizontal scanning line signal, and the first horizontal scanning line signal to the second half of the second horizontal scanning line signal.
  • the control video can be composed using 240 horizontal scanning lines from the 23rd to the 26th, which is the video display part.
  • the even field consists of the second and fifth horizontal scanning line signals from the second half of the 23rd horizontal scanning line signal, and the 240 horizontal scanning lines of the video display portion are arranged in the same manner as the odd field. Can be used to compose the control video.
  • the control video can be configured as one video. One example of that configuration is described in detail below.
  • the pallets generated from the white and black slit rows This is an example in which the number of bars corresponds to the control command ⁇ identification number, but the number and width of the white and black bars, such as the bar code added to the product, may correspond to the control command ⁇ identification number. .
  • the first group configures the video that indicates the start of the control video
  • the second group configures the video that specifies the identification number of the specific video control device
  • the third group configures the video that specifies the control command can do.
  • the operation timing of the control command can be indicated by the video of the fourth group.
  • the fifth and subsequent groups can be used for different purposes.
  • the video indicating the end of the control video is placed last.
  • the video part not used as a control signal can be used to display a sentence indicating the content of the control video.
  • a case where all the horizontal scanning lines included in the first group are composed of 30 white pulse signals can be used as a criterion for the control image.
  • Such an image can be created by drawing 30 white rectangular bars horizontally in the 23rd to 42nd horizontal scanning lines on a black screen.
  • video signals of the second to fourth groups can be formed.
  • the control video it can be transmitted as a plurality of continuous video.
  • the first is the video that indicates the start of the video
  • the second is the video with the identification number of the video controller
  • the third is the video of the control command
  • the fourth is the video that indicates the operation timing of the control command
  • the fifth is the end of the control video
  • the video control device can extract a valid control video from the received video by detecting the video that indicates the start and end of the control video.
  • FIG. 1 illustrates the overall configuration of the video distribution and display control system of the present application.
  • One control video generation device (1), four video control devices (2), and It consists of a connected video monitor (3).
  • the control video generation device (1) is composed of video generation devices.
  • a control video generation unit (11) and a plurality of display video generation units (12) are separately provided.
  • the control video and the display video may be switched using the switch (14) and transmitted on the same video transmission line.
  • the video control device (2) includes a video signal amplification / distribution unit (21) for amplifying and distributing an input video, and a detection unit for extracting a control signal from the distributed video signal.
  • a control CPU (23) for controlling the control signal analysis and control operation, a converter (24) for converting the distributed video signal into a storage signal, and storing the converted signal.
  • the video signal storage section (25) includes a plurality of storage sections so that a plurality of still images and a plurality of moving images can be stored.
  • the control CPU (23) controls the video signal storage unit (25) and the display video selection control unit (27) according to the control signal.
  • Fig. 6 is an example of a control image.
  • the video screen is divided vertically into eight strip-shaped areas, each of which is a group.
  • the black part corresponds to the black level of the video signal
  • the white part corresponds to the white level of the video signal.
  • the black and white levels of the video signal are detected as LOW and HIGH of the electrical signal and can be processed as pulse signals.
  • the first group consists of horizontal scanning lines with eight pulse signals. Indicates the start of the control image.
  • the second group represents the identification number of the video control device (2). If it is composed of horizontal scanning lines having two pulse signals, it indicates that the second video control device (2) is the target.
  • the third group represents control commands. If it is composed of horizontal scanning lines with three pulse signals, it is necessary to store the video sent after this control video in the video signal storage unit (25), reproduce it, and output the video. Represents.
  • the fourth group indicates the address of the storage unit, which is composed of horizontal scanning lines having one pulse signal, and indicates that the captured image is stored in the first storage unit.
  • the fifth group indicates the start timing of the control operation, which is composed of horizontal scanning lines with two pulse signals.
  • the image to be stored starts the capture operation twice as long as the control image is received It indicates that you want to.
  • the shortest unit time is one frame of video. However, the time during which the video can be easily edited and transmitted from the control video generation device (1) such as a personal computer may be set as the unit time.
  • the sixth group consists of horizontal scanning lines with five pulse signals, indicating that the stored video is five times as long.
  • the seventh group consists of horizontal scanning lines with three pulse signals, indicating that a request is made to send a completion signal at the end of the video storage process.
  • the eighth group consists of horizontal scanning lines with eight pulse signals, indicating that this video is the end of the control video.
  • FIG. 6 (b) exemplifies the horizontal scanning lines in this area, and the luminance signal of the portion corresponding to the eight whites of the video is at the high level.
  • FIG. 7 shows an example of a video output by the control video generation device (1), in which a control video and a display video are combined to form a continuous video.
  • a display image to be controlled is arranged after the control image, and is continuously transmitted using the same video transmission line, so that a plurality of video control devices (2 ) Can simultaneously distribute control information and video information.
  • the control video and the display video do not necessarily need to be paired.
  • the first video indicates that it is a control video
  • the second video specifies a specific video control device (2).
  • the control operation can be specified by the third image.
  • the displayed image may be used as a plurality of images such as a still image for the first image and a moving image for the second image.
  • the control video generation device (1) outputs a control video addressed to the second video control device (2). This control video is transmitted to four video controllers (2).
  • the video signals input to the four video control units (2) are amplified by the respective video signal amplification / distribution units (2 1) and sent to the detection units (2 2).
  • the detection unit (22) detects whether the received video is a control video, and if it is a control video, analyzes the identification number. Since the second video control device (2) has received the control video having the identification number addressed to itself, the control CPU (23) analyzes the control command included in the control video and performs a predetermined operation. Becomes The video control device other than the second video control device (2) detects that the control video is not intended for itself, stops the process, and waits for the next control video to arrive. If this control command instructs that the subsequent display video be captured as a one-frame still image after twice the unit time, stored in the storage device, and displayed on the video monitor (3),
  • the procedure and operation are as follows.
  • the control video generator (1) After outputting the control video, the control video generator (1) outputs a display video that is sufficiently longer than the capture time specified by the video controller (2), for example, three times as long as the unit time.
  • the control CPU (23) of the second video controller (2) sets the set value of the built-in timer to twice the unit time.
  • the control CPU (23) sends a recording start signal to the video signal storage (25).
  • the video signal storage section (25) captures one frame of video while synchronizing with the video synchronization signal.
  • the control CPU (23) sends a reproduction output signal of the recorded video to the video signal storage (25).
  • the video signal storage unit (25) reproduces and outputs the specified video according to the control signal of the control CPU (23).
  • the control CPU (23) sends a control signal for selecting the specified video signal and outputting it to the video monitor (3) to the display video selection control unit (27).
  • the display video selection control unit (27) switches the switch according to the control signal from the control CPU (23) and outputs the specified video signal to the output circuit.
  • the specified video is displayed on the video monitor (3) connected to the output circuit.
  • the second video control device (2) can store the second video as a still image of one frame in the second storage unit. By sending a command to alternately display the first still image and the second still image at regular time intervals, the blinking display using two still images is displayed on the video monitor (3). Can be done.
  • a character signal generating and superimposing unit is configured in the video output unit of the video control device (2).
  • the control CPU (23) of the video control device (2) controls the character signal generating and superimposing section (28).
  • the character signal generation and superimposition section (28) sends out a character signal of the code specified by the built-in character generator, and synchronizes with the output video synchronization signal.
  • a character signal is superimposed on a specified position.
  • FIG. 9 is a configuration example of a video control device (2) having a first video input and a second video input.
  • a video control device (2) having a first video input and a second video input.
  • another display video from the second video input is input, and the display video of the video monitor (3) is displayed. It is controlled by control video from one video input.
  • the control command of the control image is a command to display the image from the first image input
  • the control CPU (23) of the image control device (2) sends a signal to the display image selection control unit (27). And sends the video from the first video input to the video monitor (3).
  • control command of the control image is a command to display an image from the second image input
  • control CPU (23) of the image control device (2) sends a signal to the display image selection control unit (27). And outputs the video of the second video input to the video monitor (3).
  • a video monitor (3) is connected to the video control device (2), and a relay section for controlling the power supply of the video monitor (3) is provided in the video control device (2). is there. If the control command of the control image is a command to turn on or off the power of the video monitor (3), the control CPU (23) of the video control device (2) will turn on or off the power to the relay section. A signal is sent, and the relay unit controls the power on / off of the video monitor (3).
  • the power to control the power supply of the remote video monitor (3) using the control video It is also used to control the operation of the buzzer and other notification devices and decoration devices such as colored light bulbs, and the on / off control of the lighting in the room where the video monitor (3) is installed. it can.
  • the control image it is also possible to control the turntable on which the image monitor (3) is mounted. Each time the displayed image changes, the image monitor (3) rotates once, and other related functions required for the image information service.
  • Device control It becomes possible to comprehensively control the video generation device (1).
  • Fig. 11 shows that the video controller (2) has a second video such as a video tape device or DVD device.
  • a generation device (7) is connected. It is also possible to incorporate the second video generation device (7) into the video control device (2) and configure it integrally.
  • the video signal from the second video generator (7) is connected to the display video selection controller (27).
  • a control signal from a control CPU (23) for operating the second video generation device (7) is configured to be input to the second video generation device (7).
  • the procedure for displaying the video from the second video generation device (7) on the video monitor (3) is as follows.
  • the control video generation device (1) transmits a video number to be reproduced by the second video reproduction / transmission device and a control video for instructing a reproduction start to the specific video control device (2).
  • the control CPU (23) analyzes the command content of the control video and sends the video number to be reproduced to the second video generation device (7). Send a signal to start playback.
  • the second video generator (7) selects a video to be reproduced according to a control signal from the control CPU (23), and starts reproducing and outputting the video.
  • the control CPU (23) selects a video from the second video generation device (7), and transmits a control signal to output the video to the display video selection control unit (27).
  • the display video selection control unit (27) selects a video signal from the second video generation device (7) according to a control signal from the control CPU (23), and outputs the video signal to a video output circuit. It will not be necessary to explain that the control video from the control video generator (1) can be used to turn on and off the second video playback and transmission device connected to the video controller (2). Further, when the second video generation device (7) is controlled by an infrared signal, the control CPU (23) of the video control device (2) is necessary for the infrared control signal generation unit (not shown). The command is sent, and the infrared control signal generator sends out the corresponding infrared signal and sends it to the second video generator (7).
  • an audio signal input is connected to the audio control unit (30) of the video control device (2), an audio signal is output from the audio control unit (30), and the audio control unit (30)
  • the configuration is connected to the control CPU (23).
  • the voice control unit (30) receives a control signal from the control CPU (23).
  • the sound control unit (30) outputs a sound signal input as sound. If the received control signal is a command to end the audio output, the audio control unit (30) does not output the input audio signal.
  • An operation example of the video control device (2) configured as described above will be described. First, the control video generation device (1) transmits a control video for instructing capture and display of a video, and subsequently transmits a video for display.
  • the video control unit (2) detects the input video signal by the detection unit (22), and the control CPU (23) identifies that the control video is a command to capture and display the video. .
  • the control CPU (23) performs control to store the display image continuously transmitted after the control image in the image signal storage unit (25), reproduce the display image, and display it on the image monitor (3).
  • the control video generation device (1) transmits a control video for instructing the start of audio output, and this video signal is input to the video control device (2).
  • the video controller (2) detects the input video signal by the detector (22), and the control CPU (23) identifies that it is a command to start audio output.
  • the control CPU (23) transmits an audio output start signal to the audio control unit (30).
  • the voice control unit (30) receives this control signal and outputs a voice signal input as voice. According to the above procedure, the specified display video can be displayed on the video monitor (3), and the sound suitable for this video can be emitted from the audio transmission device.
  • an audio signal input is connected to the audio storage / reproduction unit (31) of the video control device (2), the audio signal from the audio storage / reproduction unit (31) is output, and the audio storage / reproduction unit is output.
  • (31) is a configuration connected to the control CPU (23).
  • the audio storage / reproduction unit (31) receives a control signal from the control CPU (23). If the received control signal is a command to store and store the voice signal, the voice storage and playback unit (31) outputs the input voice signal. Is stored in the storage unit. When the received control signal is a command for sound reproduction output, the sound storage and reproduction unit (31) reproduces and outputs the sound signal stored in the sound storage unit.
  • the control video generation device (1) transmits a control video for instructing capture and display of a video, and subsequently transmits a display video. These video signals are input to the video control device (2).
  • the video controller (2) detects the input video signal by the detector (22), and the control CPU (23) identifies that the command is a command to capture and display a video.
  • the control CPU (23) fetches the display image continuously transmitted after the control image into the image signal storage unit (25), reproduces the display image, and displays it on the image monitor (3).
  • the control video generation device (1) transmits a control video for instructing audio reproduction output, and this video signal is input to the video control device (2).
  • the video control device (2) detects the input video signal in the detection section (22), and the control CPU (23) identifies that it is a command to perform audio reproduction output.
  • the control CPU (23) transmits a sound reproduction output signal to the sound storage / reproduction unit (31).
  • the voice storage / reproduction unit (31) receives the control signal, reproduces the voice signal stored in the voice storage unit, and outputs the voice.
  • the specified display video can be displayed on the video monitor (3), and the sound suitable for this video can be emitted from the audio transmission device.
  • FIGS. 14 and 15 show the system configuration when radio waves are used for the transmission path of the video signal between the control video generation device (1) and the video control device (2).
  • Radio wave transmitter (13) modulates a video signal into a radio signal and transmits it, and the signal receiver on the video signal reception side (32) demodulates it and restores it to a video signal. Except for the above, the same applies to the case of a wired transmission path and the case where radio waves are used between the video control device (2) and the video monitor (3), so the detailed description and description will be omitted.
  • the control video is recorded on a video tape and the control video is reproduced and output from the VCR, a horizontal scanning line signal drop error may occur.
  • Control signal In order to reliably transmit, a plurality of horizontal scanning lines having the same signal pattern are configured as a group, and a group signal is used, whereby reliable signal transmission can be realized.
  • the video distribution and display control system of the present invention controls a plurality of video controllers using video signals from a control video generator, and controls a video monitor connected to a specific video controller.
  • a desired image the following effects are provided.
  • the contents of the control code can be visually recognized, so that the creation and management of the control signal becomes easy.
  • By transmitting the control video and the display video using the same video transmission path only one signal transmission path is required, and the control of the timing of displaying the video and the control of the display order become easy.
  • control video and display video are clipped and arranged, output as a continuous video, which is distributed to multiple video controllers via a single transmission path, thereby creating multiple video controls.
  • a complex video display system using a monitor can be easily realized.
  • the control video generation device is requesting a signal to complete the operation of the video control device, the video control device can transmit a completion signal to the control video generation device using a completion signal transmission path not shown in the figure. .

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
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  • General Physics & Mathematics (AREA)
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Abstract

L'invention concerne un système de service d'informations vidéo, qui comprend : une unité d'émission vidéo de contrôle (1), une unité de contrôle vidéo (2), des moniteurs vidéo (3), et des canaux de transmission vidéo connectant lesdites unités. La vidéo produite par l'unité d'émission vidéo de contrôle (1) est composée d'une vidéo d'affichage affichée sur des moniteurs vidéo (3), et d'une vidéo de contrôle comprenant un numéro d'identification permettant de spécifier une unité de contrôle vidéo (2) et une commande de contrôle. L'unité d'émission vidéo de contrôle (1) place la vidéo d'affichage après la vidéo de contrôle, et transmet de façon continue la vidéo par l'intermédiaire du même canal de transmission vidéo, afin de distribuer la vidéo de contrôle et la vidéo d'affichage aux unités de contrôle vidéo (2). Chaque unité de contrôle vidéo (2) détecte la vidéo de contrôle reçue de l'unité d'émission vidéo (1) et analyse le numéro d'identification et le contenu de la commande de contrôle. Si le numéro d'identification correspond à son propre numéro d'identification, l'unité de contrôle vidéo (2) contrôle la vidéo affichée sur le moniteur vidéo (3), conformément au contenu de la commande de contrôle.
PCT/JP2000/004856 1999-07-21 2000-07-19 Systeme de controle de distribution et d'affichage video Ceased WO2001006485A1 (fr)

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AU60210/00A AU6021000A (en) 1999-07-21 2000-07-19 Video distribution and display control system

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JP11/205492 1999-07-21
JP20549299 1999-07-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7348955B2 (en) 2001-06-15 2008-03-25 Sharp Kabushiki Kaisha Method of controlling display method, display-use signal producing device, display device, and display system for implementing the method

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JPH09319687A (ja) * 1996-05-31 1997-12-12 Matsushita Electric Ind Co Ltd 遠隔制御システム及び遠隔制御装置
JPH09322135A (ja) * 1996-05-31 1997-12-12 Nagano Japan Radio Co 画像表示システム
JP2000050250A (ja) * 1998-07-27 2000-02-18 Fujitsu General Ltd 競技場向け情報表示画面制御システム

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US7348955B2 (en) 2001-06-15 2008-03-25 Sharp Kabushiki Kaisha Method of controlling display method, display-use signal producing device, display device, and display system for implementing the method

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