Video output device, video display device, video display system, and pairing method for that

Abstract

To provide a video display system capable of automatically linking a video output device as a master unit and a video display device as a slave unit on a network.SOLUTION: In a video display system including multiple video output devices and multiple video display devices being connected via a network, when a predetermined video output device as one of the multiple video output devices and a predetermined video display device as one of the multiple video display device are connected, the predetermined video output device transmits a video signal for starting pairing to the predetermined video display device. Subsequently, the predetermined video display device receives the video signal for starting pairing transmitted from the predetermined video output device. Here, the video signal for starting pairing is a video signal that includes a predetermined pattern video signal or a signal indicating the start of pairing at a specific position on the video signal.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a video output device, a video display device, a video display system, and a pairing method therefor. [Background technology]

[0002] In the prior art, in order to communicate between a parent unit, which is a video output device, and a child unit, which is a video display element, pairing on a network is required. For example, the invention of Patent Document 1 (hereinafter referred to as the prior art) discloses a pairing method that can improve the communication speed of the communication.

[0003] In the prior art invention, specifically, (A) a parent unit, such as a karaoke machine, having an infrared receiving function and a network communication function; (B) a slave unit, which is a remote controller such as a wireless terminal device for operation, having an infrared communication function and a network communication function and is identified by an ID; A communication system is disclosed comprising:

[0004] wherein the pairing method for the communication system comprises: (1) A procedure in which a slave unit transmits its own ID to a specific master unit as an infrared signal; (2) a procedure for the parent unit to receive an infrared signal containing the child unit's ID; (3) a procedure in which the parent device broadcasts a confirmation message including the ID of the child device received on the network; (4) When the slave unit receives a confirmation message including its own ID from the master unit, it registers the master unit as a communication partner and sends a confirmation message addressed to the master unit; (5) When the master unit receives a confirmation message addressed to itself from the slave unit, it registers the slave unit as a communication partner; Includes: [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-261807 Summary of the Invention [Problem to be solved by the invention]

[0006] However, while the prior art invention discloses a pairing method between a parent unit (karaoke machine) and a child unit (remote controller), it requires a separate communication means, such as infrared communication, to communicate the child unit's ID. Also, since pairing is triggered by a user's instruction from the remote controller, there is a problem in that the parent unit and child unit are not automatically linked.

[0007] Furthermore, for example, in order to link a parent video output device and a child video display device on a network, it is necessary to explicitly specify a network address, and as with the conventional example, there was a problem in that the parent and child devices could not be automatically linked.

[0008] The object of the present disclosure is to solve the above problems and to provide a video display system that can automatically link a parent video output device and a child video display device over a network, a pairing method therefor, and a video output device and a video display device for the video display system. [Means for solving the problem]

[0009] A video display system according to the present disclosure includes a plurality of video output devices and a plurality of video display devices connected to each other via a network. When a predetermined video output device that is one of the plurality of video output devices is connected to a predetermined video display device that is one of the plurality of video display devices, the predetermined video output device transmits a pairing start video signal to the predetermined video display device. The predetermined video display device receives the pairing start video signal transmitted from the predetermined video output device. [Effects of the Invention]

[0010] Therefore, according to the present disclosure, when a predetermined video output device and a predetermined video display device are connected, the predetermined video output device transmits a pairing start video signal to the predetermined video display device, whereby the pairing start video signal serves as a trigger to automatically link the video output device as a parent device and the video display device as a child device over a network. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a video display system according to an embodiment. [Figure 2] A block diagram showing an example of the configuration of the video output devices 1A, 1B, and 1C of FIG. [Figure 3] FIG. 2 is a block diagram showing an example of the configuration of the image display devices 2A, 2B, and 2C of FIG. 1. [Figure 4] A photographic image showing a first example of a pairing start video signal IS used in the video display system of FIG. 1. [Figure 5] A photographic image showing a second example of a pairing initiation video signal IS used in the video display system of FIG. 1. [Figure 6] A timing chart showing the steps of a pairing method in the video display system of FIG. 1. [Figure 7] A flowchart showing a pairing process executed by the video output device 1 of FIG. 1. [Figure 8] A flowchart showing a pairing start message reception process executed by the video output device 1 of FIG. 1. [Figure 9] A flowchart showing an exclusive control acquisition process executed by the video output device 1 of FIG. 1. [Figure 10] 1 is a flowchart showing a pairing end message receiving process and a timer end signal receiving process executed by the video output device 1 of FIG. [Figure 11] 1 is a flowchart showing a pairing process executed by the video display device 2 of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, more detailed description than necessary may be omitted. For example, detailed description of well-known matters or redundant description of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art.

[0013] The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0014] (Inventor's Knowledge) In the following cases, for example, a video output device such as a video playback device is connected to a video display device such as a projector, and it is necessary to read out specific information and change settings between the two devices. In this case, it is necessary to pair the video output device and the video display device and create an environment where one-to-one communication can be achieved.

[0015] (Case A) When a video output device substitutes for some of the image processing functions of a video display device, for example, when the video output device is capable of more advanced geometric correction processing, it is necessary to check the status of the relevant function of the video display device, read out the parameters, and change the settings (off), etc.

[0016] (Case B) In cases where higher image quality can be expected by using the image processing function provided in the video display device in contrast to the image processing function set in the video output device, if, for example, the bit precision drops when the image is sent to the video display device, resulting in a deterioration in image quality, it is necessary to check whether or not the video display device has the relevant function, its status, and change the settings.

[0017] In order to solve the problems in the above cases A and B, the following embodiment is characterized in that pairing is performed between the video output device and the video display device by automatically exchanging and registering network addresses, such as IP addresses, on a network such as a LAN (Local Area Network).

[0018] (Embodiment) FIG. 1 is a block diagram showing an example of the configuration of a video display system according to an embodiment.

[0019] (Video display system configuration) 1, the video display system is configured to include a plurality of video output devices, for example, three, 1A, 1B, and 1C (hereinafter collectively referred to as video output devices 1), a plurality of video display devices, for example, three, 2A, 2B, and 2C (hereinafter collectively referred to as video display devices 2), and a network 5, for example, a LAN (Local Area Network). Here, each video output device 1 is, for example, a video playback device and is connected to the network 5. Furthermore, each video display device 2 is, for example, a projector and is connected to the network 5.

[0020] The video output terminal of video output device 1A and the video input terminal of video display device 2A are connected by a user via a video cable 4A, such as an HDMI (registered trademark) (High-Definition Multimedia Interface) cable. The video output terminal of video output device 1B and the video input terminal of video display device 2B are connected by a user via a video cable 4B, such as an HDMI cable. The video output terminal of video output device 1C and the video input terminal of video display device 2C are connected by a user via a video cable 4C, such as an HDMI cable. The video cables 4A, 4B, and 4C are collectively referred to as video cable 4.

[0021] Screens 3A, 3B, and 3C (collectively referred to as screens 3) are disposed at the projection planes of the image display devices 2A, 2B, and 2C, respectively. After each image output device 1 and each image display device 2 are connected by a user via a video cable 4, the image output device 1 and each image display device 2 are paired via a network 5, as will be described in detail below. Next, a video signal is transmitted from each image output device 1 to its corresponding paired image display device 2 via the video cable 4, and each image display device 2 converts the received video signal into projection image light. The projection image light from each image display device 2 is then projected onto each screen 3, allowing the user to view the image of each video signal.

[0022] (Configuration of video output device) Fig. 2 is a block diagram showing an example of the configuration of the video output device 1 (1A, 1B, 1C) in Fig. 1. Note that the video output devices 1A, 1B, 1C have the same configuration.

[0023] In FIG. 2, the video output device 1 includes a control unit 10 having an internal memory 10m, a communication signal communication unit 11, a video signal processing unit 12 having a video signal memory 12m, and a video signal transmission unit 1 The control unit 10 is configured to include a communication signal communication unit 11, a video signal processing unit 12, a video signal transmission unit 13, and a control signal communication unit 14. Here, the control unit 10 controls the operations of the communication signal communication unit 11, the video signal processing unit 12, the video signal transmission unit 13, and the control signal communication unit 14 based on the programs, signals, and data stored in the built-in memory 10m.

[0024] The communication signal communication unit 11 transmits and receives communication signals to and from other video output devices 1 and video display devices 2 via the network 5 using, for example, a communication protocol such as TCP / IP (Transmission Control Protocol / Internet Protocol). The communication signal communication unit 11 broadcasts or unicasts communication signals such as messages to be sent from the control unit 10, and also receives communication signals such as messages via the network 5 and outputs them to the control unit 10. Under the control of the control unit 10, the video signal processing unit 12 converts data of a video signal for video display stored in the video signal memory 12m into video data in a predetermined format and outputs the video signal transmitting unit 13. Also, under the control of the control unit 10, the video signal processing unit 12 converts data of a pairing start video signal IS (described in detail later) stored in the video signal memory 12m into video data in a predetermined format and outputs the video signal transmitting unit 13.

[0025] The video signal transmitting unit 13 is connected to the video signal receiving unit 21 of the video display device 2 via the video cable 4. Under the control of the control unit 10, the video signal transmitting unit 13 converts the video data from the video signal processing unit 12 into, for example, HDMI-compliant TDMS (Technical Data Management Streaming) video data and a clock signal, and also generates, for example, an HDMI-compliant +5V-Power signal and a DDC (Display Data Channel: HDCP (High-bandwidth Digital Content Protection), EDID (Extended Display Identification Data)) control signal, and transmits these signals to the video signal receiving unit 21 of the video display device 2 via the video cable 4.

[0026] The control signal communication unit 14 is connected to the control signal communication unit 24 of the video display device 2 via the video cable 4. Under the control of the control unit 10, the control signal communication unit 14 communicates with the control signal communication unit 24 of the video display device 2 using, for example, an HPD (Hot Plug Detect) signal and a CEC (Consumer Electronics Control) signal that comply with HDMI.

[0027] The video output device 1 determines whether or not a connection via the video cable 4 with the video display device 2 has been established by using, for example, the plug-and-play function of HDMI. That is, when the user connects the video cable 4 to the video output device 1 and the video display device 2, the video output device 1 transmits a high-level +5V-Power signal to the video display device 2, and in response, the video display device 2 replies with a high-level HPD signal, which enables the video output device 1 to determine that a connection via the video cable 4 has been established.

[0028] The video output device 1 configured as described above communicates with other video output devices 1 and video display devices 2 using control signals via the network 5. Furthermore, when starting pairing, the video output device 1 converts data of the pairing start video signal IS stored in the video signal memory 12m into video data of a predetermined format and transmits it from the video signal transmission unit 13 to the video display device 2, and when displaying a projected video, converts data of the video signal for video display stored in the video signal memory 12m into video data of a predetermined format and transmits it from the video signal transmission unit 13 to the video display device 2.

[0029] (Configuration of video display device) Fig. 3 is a block diagram showing an example of the configuration of the video display device 2 (2A, 2B, 2C) in Fig. 1. The video display devices 2A, 2B, 2C have the same configuration.

[0030] 3, the video display device 2 is configured to include a control unit 20 having an internal memory 20m, a video signal receiving unit 21, a video signal processing unit 22 having a video signal memory 22m, a projection-type video display unit 23, a control signal communication unit 24, and a communication signal communication unit 25. Here, the control unit 20 controls the operations of the video signal receiving unit 21, the video signal processing unit 22, the projection-type video display unit 23, the control signal communication unit 24, and the communication signal communication unit 25 based on the programs, signals, and data stored in the internal memory 20m.

[0031] Video signal receiving unit 21 is connected to video signal transmitting unit 13 of video output device 1 via video cable 4, receives video data received via video cable 4, and outputs it to video signal processing unit 22. Video signal processing unit 22 determines whether the received video data is video data for video display or data for pairing initiation video signal IS (FIG. 4). If it is the former, it converts the video data into video signal data in a predetermined format and outputs it to projection-type video display unit 23. If it is the latter, it compares the received data of pairing initiation video signal IS with the data of pairing initiation video signal IS stored in video signal memory 22m, determines whether they are the same video data using, for example, a pattern recognition method, and outputs a determination result signal to control unit 20.

[0032] Projection-type video display unit 23 converts the video signal data from video signal processing unit 22 into predetermined projection image light and projects it onto screen 3. Control signal communication unit 24 is connected to control signal communication unit 14 of video output device 1 via video cable 4. Under the control of control unit 20, control signal communication unit 24 communicates with control signal communication unit 14 of video output device 1 using, for example, an HPD (Hot Plug Detect) signal and a CEC (Consumer Electronics Control) signal that comply with HDMI.

[0033] The communication signal communication unit 25 transmits and receives communication signals to and from other video display devices 2 and video output devices 1 via the network 5 using communication procedures such as TCP / IP (Transmission Control Protocol / Internet Protocol) and UDP (User Datagram Protocol / Internet Protocol). The communication signal communication unit 25 transmits communication signals such as messages to be sent from the control unit 20 by broadcast or unicast, and also receives communication signals such as messages via the network 5 and outputs them to the control unit 20.

[0034] The video display device 2 configured as described above communicates with the video output device 1 and other video display devices 2 via the network 5 using control signals. The video display device 2 also determines whether the video data received from the video output device 1 is video data for video display or data for a pairing initiation video signal IS. If it is the former, the video data is converted into projection image light using video signal data in a predetermined format and projected onto the screen 3. If it is the latter, the control unit 20 determines whether the received data of the pairing initiation video signal IS (FIG. 4) is the same as the data of the pairing initiation video signal IS stored in the video signal memory 22m, for example, by pattern recognition. If they match, the control unit 20 determines whether to start pairing.

[0035] (Video signal data for starting pairing) Fig. 4 is a photographic image showing a first example of a pairing initiation video signal IS used in the video display system of Fig. 1. The pairing initiation video signal IS of Fig. 4 is a video signal with a predetermined special pattern, and the data thereof is stored in advance in the video signal memory 12m of the video output device 1 of Fig. 2 and the video signal memory 22m of the video display device 2 of Fig. 3. As described above, the video signal processing unit 22 of the video display device 2 determines whether the data of the received video signal is the data of the pairing initiation video signal IS, thereby determining whether to start pairing.

[0036] FIG. 5 is a photographic image showing a second image example of the pairing initiation video signal IS used in the video display system of FIG.

[0037] As described above, instead of receiving data of the pairing start video signal IS (FIG. 4) from the video output device 1, the start of pairing may be determined based on whether or not the pairing start video signal IS is at a specific position (for example, the first line) of the video signal, as shown in FIG. 5. That is, the pairing start video signal IS includes a predetermined signal indicating the start of pairing at a specific position of the video signal.

[0038] (Pairing method in video display system) Fig. 6 is a timing chart showing the procedure of the pairing method in the video display system of Fig. 1. In one example of the procedure of Fig. 6, first, video output device 1A and video display device 2A are connected by video cable 4A and paired with each other, and then the procedure moves on to pairing other video output devices 1B and 1C with video display devices 2B and 2C.

[0039] 6, first, when a user connects video output device 1A and video display device 2A with video cable 4A, using, for example, the plug-and-play function of HDMI, video output device 1 transmits a H level +5V-Power signal to video display device 2, and in response, video display device 2 replies with a H level HPD signal, causing video output device 1 to determine that connection via video cable 4 has been established. At this time, video output device 1A broadcasts a pairing start message to network 5, and then transmits a pairing start video signal IS to video display device 2A connected via video cable 4A.

[0040] At this time, after receiving the pairing start message from video output device 1A, video output devices 1B and 1C are set to disable pairing processing with video output devices other than video output device 1A until they receive a pairing end message from video output device 1A or until a predetermined time has passed. Therefore, as shown in Fig. 6, even if video output device 1C and video display device 2C are connected by video cable 4C and it is determined that the connection has been established, pairing processing is prohibited and they enter a standby state.

[0041] When the video display device 2A receives the pairing start video signal IS from the video output device 1A, it broadcasts a pairing message to the network 5. In response to this, the video output device 1A performs a pairing process with the video display device 2A, registers the IP address of the video display device 2A, and transmits a response message (ACK) (an example of a first response message) to the video display device 2A, which is the pairing device. In response to this, the video display device 2A performs a pairing process with the video output device 1A, registers the IP address of the video output device 1A, and returns a response message (ACK) (an example of a second response message) to the video output device 1A. In response to this, the video output device 1A broadcasts a pairing end message to the network 5.

[0042] In response to this, the video output device 1C, which has been in a standby state, broadcasts a pairing start message to the network 5 in order to start the pairing process with the video display device 2C, and then transmits a pairing start video signal IS to the video display device 2C via the video cable 4C. As a result, the video output device 1C begins the pairing process with the video display device 2C.

[0043] (pairing process, etc.) Furthermore, specific pairing processing and the like executed by the video output device 1 and the video display device 2 will be described below with reference to FIGS.

[0044] FIG. 7 is a flowchart showing a pairing process executed by the video output device 1 of FIG. The start timing of the pairing process in FIG. 7 is not limited to the establishment of the connection of the video cable 4 shown in FIG. 6, and may be, for example, (1) When a LAN cable is connected to connect the video output device 1 to the network 5, (2) When a notification message is received from the corresponding video display device 2 that the IP address has been changed, or (3) It may be when the user inputs an instruction to start pairing on the operation unit of the video output device 1.

[0045] 7, the video output device 1 executes the exclusive control acquisition process (FIG. 9), and then in step S2, transmits a pairing start video signal IS to the connected video display device 2 via the video cable 4. Next, in step S3, it is determined whether or not a pairing message has been received from the connected video display device 2 within a predetermined time, and if YES, the process proceeds to step S4, whereas if NO, the process determines that a "timeout error" has occurred and proceeds to step S8.

[0046] In step S4, the IP address in the received pairing message is registered in built-in memory 10m as the network address of the pairing device (the connected video display device 2). Next, in step S5, a response message containing the IP address of video output device 1 itself is sent to the pairing device that sent it, and in step S6, it is determined whether the response message was received within a predetermined time. If the result is YES, the process proceeds to step S8. However, if the result is NO the first time and the result is a "retransmission timeout," the process returns to step S5 and resends the response message. If the result is NO the second time and the result is a "timeout error," the process proceeds to step S7. In step S7, it is determined that communication with the pairing device via network 5 is not possible, so the network address registration of the pairing device is deleted, and the process proceeds to step S8.

[0047] In step S8, a pairing completion message is broadcast to the network 5, in step S9 the "exclusive state" is set to "idle", and in step S10 the transmission of the pairing start video signal IS is stopped, and the pairing process is terminated.

[0048] Fig. 8 is a flowchart showing the pairing start message reception process executed by the video output device 1 of Fig. 1. The pairing start message reception process of Fig. 8 is started when a pairing start message is received.

[0049] 8, it is determined whether the "exclusive state" is "idle," and if YES, the process proceeds to step S12, whereas if NO, the process proceeds to step S15. Next, in step S12, the "exclusive state" is set to "other device exclusive," and in step S13, a timer is started for a predetermined time. In step S14, an acknowledgement message (ACK) is transmitted to the sender of the pairing start message, thereby terminating the pairing start message reception process. On the other hand, in step S15, a negative acknowledgement message (NACK) is transmitted to the sender of the pairing start message, thereby terminating the pairing start message reception process.

[0050] After the timer is started in step S13 of FIG. 8, when the timer reaches a predetermined time, a timer end signal is generated.

[0051] Fig. 9 is a flowchart showing the exclusive control acquisition process executed by the video output device 1 of Fig. 1. The exclusive control acquisition process of Fig. 9 is a subroutine executed in step S1 of Fig. 7.

[0052] 9, it is determined whether the "exclusive state" is "idle," and if the result is YES, the process proceeds to step S22, whereas if the result is NO, the process returns to step S21. In step S22, the "exclusive state" is set to "acquiring," and in step S23, a pairing start message is broadcast to the network 5, and the process proceeds to step S24. In step S24, it is determined whether a negative acknowledgement message (NACK) has been received via the network 5, and if the result is YES, the process proceeds to step S25, whereas if the result is NO, the process proceeds to step S27. In step S25, the "exclusive state" is set to "idle," and in step S26, the process waits for a predetermined random time, and the process returns to step S21. On the other hand, in step S27, the "exclusive state" is set to "exclusive with own device," and the exclusive control acquisition process is terminated, and the process returns to step S2 in FIG. 7.

[0053] Fig. 10 is a flowchart showing a pairing end message reception process and a timer end signal reception process executed by the video output device 1 of Fig. 1. The pairing end message reception process and the timer end signal reception process of Fig. 10 are started when a pairing end message or a timer end signal is received.

[0054] In step S31 of FIG. 10, the "exclusive state" is set to "idle" and the process ends.

[0055] Fig. 11 is a flowchart showing the pairing process executed by the video display device 2 of Fig. 1. The pairing process of Fig. 11 starts when a video signal is received from the connected video output device 1.

[0056] 11, it is determined whether the received video signal is a pairing start video signal IS, and if the result is YES, the process proceeds to step S42, whereas if the result is NO, the process returns to step S41. In step S42, a pairing message containing an IP address is broadcast, and in step S43 it is determined whether a response message is received within a predetermined time, and if the result is YES, the process proceeds to step S44, whereas if the result is NO, the process determines that a "timeout" has occurred and returns to step S41. Furthermore, in step S44, the IP address in the received response message is registered in the built-in memory 20m as the network address of the pairing device (the connected video output device 1), and the response message is sent to the pairing device (the connected video output device 1) that sent the response message, and the process returns to step S41.

[0057] (Effects of the embodiment) In the conventional example, in order to link a video output device 1 and a video display device 2 that receives the video signal output from the video output device 1 on a network 5, it was necessary to explicitly specify a network address, and in a video display system having multiple pairs of video output device 1 and video display device 2, there was a problem that address setting became complicated.

[0058] To solve this problem, as described above, according to this embodiment, when the video cable 4 is connected between the video output device 1 and the video display device 2 and it is determined that the connection has been established, the video output device 1 transmits a predetermined pairing start video signal IS to the video display device 2. In response to this, when the video display device 2 receives the pairing start video signal IS, the video display device 2 sends a broadcast packet onto the network 5, and by receiving the packet, the video output device 1 can obtain the network address of the connected video display device 2.

[0059] Therefore, simply by connecting the video cable 4 between the video output device 1 and the video display device 2, network addresses are automatically obtained and registered between the video output device 1 and the video display device 2, which has the unique effect of improving the reliability and simplicity of communication between the devices.

[0060] (Variation) In the above embodiment, only the transmission of a video signal has been described, but the present disclosure is not limited to this, and a configuration may be adopted in which an audio signal is transmitted in addition to the video signal. That is, the video cable may be a video / audio cable such as an HDMI (High-Definition Multimedia Interface) cable or an AVI (Audio Video Interleave) cable.

[0061] In the above video display system, each video output device 1 stores video data, but the present disclosure is not limited to this. A video data server device connected to the network 5 may be provided, and the video data may be supplied from the video data server device to each video output device 1.

[0062] As described above, the embodiments have been described as examples of the technology in the present disclosure, and for that purpose, the accompanying drawings and detailed description have been provided.

[0063] Therefore, the components shown in the accompanying drawings and detailed description may include not only essential components for solving the problem, but also components that are not essential for solving the problem in order to illustrate the above technology. Therefore, the fact that these non-essential components are shown in the accompanying drawings or detailed description should not be interpreted as immediately indicating that these non-essential components are essential.

[0064] Furthermore, since the above-described embodiments are intended to illustrate the technology of the present disclosure, various modifications, substitutions, additions, omissions, etc. may be made within the scope of the claims or their equivalents. [Industrial Applicability]

[0065] As described above in detail, according to the present disclosure, simply by connecting a video cable between a video output device and a video display device, network addresses can be automatically obtained and registered between the video output device and the video display device. [Explanation of symbols]

[0066] 1, 1A, 1B, 1C Video output device 2,2A,2B,2C Video display device 3A, 3B, 3C Screen 4, 4A, 4B, 4C video cable 5. Network 10 Control Unit 10m internal memory 11. Communications Signals and Communications Department 12 Video signal processing section 12m video signal memory 13 Video signal transmitter 14 Control signal communication section 20 Control Unit 20m internal memory 21 Video signal receiving unit 22 Video signal processing section 22m video signal memory 23 Projection type image display unit 24 Control signal communication section 25. Communications and Signals Department IS Video signal for starting pairing

Claims

1. 1. A video output device for a video display system including a plurality of video output devices and a plurality of video display devices connected to each other via a network, the video output device being one of the plurality of video output devices, a control unit that automatically acquires and registers a network address between the video output device and a predetermined video display device that is one of the plurality of video display devices, and when the video output device and the predetermined video display device are connected to each other, transmits a pairing start video signal to the predetermined video display device; the control unit stops transmission of the pairing start video signal and disables pairing processing of video output devices other than the video output device. Video output device.

2. the pairing start video signal is a video signal with a predetermined pattern, or a video signal including a signal indicating the start of pairing at a specific position of the video signal; The video output device according to claim 1 .

3. the control unit broadcasts a pairing start message to the network when the video output device and the predetermined video display device are connected.

3. The video output device according to claim 1.

4. The control unit After transmitting the pairing start message to the network by broadcast, receiving a pairing message from the predetermined video display device, the pairing message including a network address of the predetermined video display device; acquiring and registering the network address of the predetermined video display device, and transmitting a first response message including the network address of the video output device to the predetermined video display device; The video output device according to claim 3 .

5. The control unit receiving a second response message from the predetermined video display device after transmitting the first response message to the predetermined video display device; broadcasting a pairing completion message to the network; The video output device according to claim 4.

6. 1. A video display device that is one of a plurality of video display devices for a video display system including a plurality of video output devices and a plurality of video display devices connected to each other via a network, Each of the video output devices is a video output device according to any one of claims 1 to 5, a control unit that receives a pairing start video signal transmitted from a predetermined video output device that is one of the plurality of video output devices when the video display device is connected to the predetermined video output device, Video display device.

7. the control unit, after receiving the pairing start video signal transmitted from the predetermined video output device, broadcasts a pairing message including a network address of the video display device to the network.

7. The image display device according to claim 6.

8. The control unit After transmitting the pairing message by the broadcast, receiving a first response message from the predetermined video output device, the first response message including a network address of the predetermined video output device; acquiring and registering the network address of the predetermined video output device, and transmitting a second response message to the predetermined video output device; 8. The image display device according to claim 7.

9. A video output device according to any one of claims 1 to 5; The image display device according to any one of claims 6 to 8, A video display system comprising:

10. 1. A pairing method for a video display system including a plurality of video output devices and a plurality of video display devices connected to each other via a network, comprising: a step of automatically acquiring and registering a network address between a predetermined video output device that is one of the plurality of video output devices and a predetermined video display device that is one of the plurality of video display devices, and when the predetermined video output device and the predetermined video display device are connected, the predetermined video output device transmits a pairing start video signal to the predetermined video display device; a step of receiving, by the predetermined video display device, the pairing start video signal transmitted from the predetermined video output device; stopping transmission of the pairing start video signal and disabling pairing processes of video output devices other than the video output device; A pairing method for a video display system, comprising:

11. the pairing start video signal is a video signal with a predetermined pattern, or a video signal including a signal indicating the start of pairing at a specific position of the video signal; The pairing method for a video display system according to claim 10.

12. The pairing method further comprises: a step of, when the predetermined video output device and the predetermined video display device are connected, broadcasting a pairing start message to the network; A pairing method for a video display system according to claim 10 or 11.

13. The pairing method further comprises: a step in which the predetermined video display device broadcasts a pairing message including a network address of the predetermined video display device to the network after receiving the pairing start video signal transmitted from the predetermined video output device; receiving, by the predetermined video output device, the pairing message from the predetermined video display device, the pairing message including the network address of the predetermined video display device; a step in which the predetermined video output device acquires and registers the network address of the predetermined video display device, and transmits a first response message including the network address of the predetermined video output device to the predetermined video display device; 13. The pairing method for a video display system according to claim 12, comprising:

14. The pairing method further comprises: receiving a second response message from the predetermined video output device after transmitting the first response message to the predetermined video display device; a step of the predetermined video output device broadcasting a pairing completion message to the network; 14. The pairing method for a video display system according to claim 13, comprising:

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