JP2012161038A - Video transmission system, transmission side wireless communication device, and reception side wireless communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video transmission system in which videos reproduced by a plurality of reproducers installed while being distributed in a plurality of rooms can be displayed on one display device.SOLUTION: The video transmission system in which video signals are transmitted from reproducers 511, 512, 513 to a display device 540 comprises: transmission side wireless communication devices 110, 120, 130 which are provided, respectively, in the reproducers 511, 512, 513 and transmit a video signal output from a reproducer corresponding to the own device over a wireless line; and a reception side wireless communication device 200 which receives video signals over a plurality of wireless lines established, respectively, for the transmission side wireless communication devices 110, 120, 130, and outputs the received video signals as the video input signals to the display device 540. When switching of the video input signal is designated, the reception side wireless communication device 200 switches the wireless line over which the own device must receive the video signal, out of the plurality of wireless lines.

Description

  The present invention relates to a video transmission system for transmitting a video signal, a transmission-side wireless communication device, and a reception-side wireless communication device.

  In recent years, in a video transmission system that transmits a video signal from a playback device to a display device, wireless HDMI (High-Definition Multimedia Interface) or wireless communication is used to reduce the complexity of cable routing between the playback device and the display device. 2. Description of the Related Art Video transmission systems that transmit video signals via wireless lines using a LAN (Local Area Network) are provided.

  Further, Non-Patent Document 1 (hereinafter referred to as “background art”) discloses a video transmission system in which one display device can be reused for a plurality of playback devices. FIG. 8 is a block diagram for explaining a video transmission system according to the background art.

  As shown in FIG. 8, the video transmission system is connected to a plurality of playback devices 511, 512, and 513 via an HDMI cable, and to a display device 540 via an HDMI cable. Receiving-side wireless communication device 530.

  The transmission-side wireless communication device 520 switches the video input signal to the display device 540 in accordance with a control command from the remote controller 521 (hereinafter, referred to as “input switching” as appropriate), and a plurality of playback devices 511, 512, The video signal output by any one of 513 is transmitted to the reception-side wireless communication device 530 via the wireless LAN line.

  Further, the display device 540 outputs a control command (HDMI-CEC signal) according to HDMI in response to the control command from the remote controller 541. The HDMI-CEC signal is transmitted to the plurality of playback devices 511, 512, and 513 via the reception-side wireless communication device 530 and the transmission-side wireless communication device 520, and the plurality of playback devices 511, 512, and 513 receive the HDMI- Remotely controlled by CEC signal.

HDMI wireless transceiver unit HD-WirelessRD & TD, http://lancerlink.shop24.makeshop.jp/shopdetail/001005000001/brandname/

  By the way, assuming a usage scene at home, there is a need to display video reproduced by a plurality of playback devices distributed in a plurality of rooms, for example, on one display device installed in a living room. is there.

  However, in the video transmission system according to the background art, it is difficult to remotely transmit the video of each of a plurality of playback devices distributed in a plurality of rooms and display them on a single display device. There was a problem that could not respond to.

  Therefore, the present invention provides a video transmission system, a transmission-side wireless communication device, and a reception-side wireless communication device that can display images reproduced by a plurality of reproduction devices distributed in a plurality of rooms or the like on a single display device. The purpose is to provide.

  In order to solve the above-described problems, the present invention has the following features.

  First, the video transmission system according to the present invention is characterized in that a video transmission system transmits video signals from a plurality of playback devices (playback devices 511, 512, 513) to a display device (display device 540). A plurality of transmission-side wireless communication devices (transmission-side wireless communication devices 110, 120, and 130) provided for each playback device perform wireless communication with the plurality of transmission-side wireless communication devices, and video input to the display device Each of the plurality of transmission-side wireless communication devices is input from a reproduction device corresponding to the own-transmission-side wireless communication device. A video signal is transmitted to the reception-side wireless communication device via a wireless line, and the reception-side wireless communication device transmits an image via a plurality of wireless lines established for each of the plurality of transmission-side wireless communication devices. A signal is received, and the received video signal is output as the video input signal to the display device, and the reception-side wireless communication device receives the plurality of video input signals when instructed to switch the video input signal. The gist of the invention is that the self-receiving-side wireless communication device among the wireless lines switches the wireless line that should receive the video signal.

  According to such a feature, by providing a transmission-side wireless communication device for each of a plurality of playback devices, even when a plurality of playback devices are installed in a plurality of rooms or the like, Since the transmitter wireless communication device can be installed in the vicinity, the playback device and the transmitter wireless communication device can be easily connected. Further, by providing the reception-side wireless communication device with a video input signal switching function, it is possible to use one display device for a plurality of playback devices. Therefore, according to the above feature, there is provided a video transmission system capable of displaying video played by a plurality of playback devices distributed in a plurality of rooms or the like on a single display device.

  Another feature of the video transmission system according to the present invention is the video transmission system according to the above feature, further comprising a control device (control device 300 or 300 ′) for remotely controlling the plurality of transmission-side wireless communication devices, The control device remotely controls the plurality of transmission-side wireless communication devices based on a first control command (common command) from an input device (remote control 301) that receives a user operation, and the plurality of transmission-side wireless communication devices The gist of each is to output to the playback device a second control command (individual command) that can be decoded by the playback device corresponding to the self-transmitting wireless communication device in accordance with remote control from the control device.

  According to such a feature, the control device remotely controls the plurality of transmission-side wireless communication devices based on the first control command, and each of the plurality of transmission-side wireless communication devices follows the remote control according to the remote control. A second control command that can be decoded by the playback device corresponding to the communication device is output to the playback device. Accordingly, it is possible to remotely control an analog playback device that does not support the HDMI-CEC signal. In addition, a user who operates an input device (such as a remote controller) remotely controls each of a plurality of playback devices distributed in a plurality of rooms while listening to a display device installed in a living room, for example. can do.

  Another feature of the video transmission system according to the present invention is that in the video transmission system according to the above feature, the control device should output the switched video signal when switching the video input signal to the display device. The gist of the invention is to remotely control a transmitting-side wireless communication device corresponding to the playback device so that the playback device is powered on. In addition, the control device, when switching the video input signal to the display device, turns off the playback device that was outputting the video signal before switching, and transmits the wireless communication on the transmission side corresponding to the playback device. The gist is to remotely control the device.

  According to such a feature, the control device remotely controls the transmitting-side wireless communication device corresponding to the playback device so that the playback device that should output the switched video signal is powered on, so that the user can Since the operation for turning on the playback device can be omitted, the convenience for the user can be improved. In addition, the control device remotely controls the transmission-side wireless communication device corresponding to the playback device so that the playback device that output the video signal before switching is turned off, thereby reducing the power consumption of the playback device. This makes it possible to save energy.

  Another feature of the video transmission system according to the present invention is that in the video transmission system according to the above feature, the control device powers off all of the plurality of playback devices based on the power-off of the display device. Thus, the gist is to remotely control the plurality of transmission-side wireless communication devices.

  According to such a feature, each of the playback devices can be remotely controlled by remotely controlling the plurality of transmission-side wireless communication devices so that all of the plurality of playback devices are powered off based on the power-off of the display device. Power consumption can be reduced, and energy saving can be achieved.

  Another feature of the video transmission system according to the present invention is that, in the video transmission system according to the above feature, the control device is configured to be able to control the reception-side wireless communication device, and the control device includes the plurality of control devices. The gist of the invention is that, based on the fact that one of the playback devices is powered on, the reception-side wireless communication device switches the radio channel on which the video signal is to be received to the radio channel corresponding to the one playback device. To do.

  According to such a feature, on the basis of the fact that one of the plurality of playback devices is powered on, the reception-side wireless communication device corresponds to the one playback device with the wireless line that should receive the video signal. By switching to a wireless line, it is possible to omit an input switching operation by the user, so that convenience for the user can be improved.

  Another feature of the video transmission system according to the present invention is that, in the video transmission system according to the above feature, the control device is configured to be able to control the display device, and the control device includes a plurality of playback devices. The gist is to control the display device to be turned off based on the fact that the power is turned off.

  According to such a feature, the power consumption of the display device can be reduced and the energy can be saved by powering off the display device based on the fact that all of the plurality of playback devices are powered off. .

  Another feature of the video transmission system according to the present invention is that, in the video transmission system according to the above feature, each of the plurality of transmission-side wireless communication devices receives an analog video signal from a playback device corresponding to its own transmission-side wireless communication device. When input, the gist is to convert the analog video signal into a specific digital video signal (HDMI signal) and transmit it to the receiving-side wireless communication device.

  According to such a feature, each of the plurality of transmission-side wireless communication devices, when an analog video signal is input from a playback device corresponding to the self-transmission-side wireless communication device, It is converted into a signal (for example, HDMI signal) and transmitted. This makes it possible to digitally transmit a video signal even when an analog playback device is used.

  Another feature of the video transmission system according to the present invention is that, in the video transmission system according to the above feature, the control device is incorporated in the reception-side wireless communication device.

  According to such a feature, since the control device is built in the reception-side wireless communication device, it is not necessary to separately provide a server as the control device, and costs and the like can be reduced.

  Another feature of the video transmission system according to the present invention is that in the video transmission system according to the above feature, the plurality of playback devices output video signals in parallel, and the plurality of transmission-side wireless communication devices are The video signal output from the playback device is transmitted in parallel, and the receiving-side wireless communication device receives a plurality of video signals in parallel via the plurality of wireless lines, One is output as the video input signal, the remaining video signal of the plurality of video signals is temporarily stored, and when the switching of the video input signal is instructed, the stored video signal The video signal after switching is output from the gist.

  According to such a feature, switching of the video input signal can be performed immediately by outputting the buffered (or cached) video signal when switching the video input signal. The instantaneous interruption period of the video displayed on the display device can be shortened.

  A feature of the transmission-side wireless communication device according to the present invention is that a transmission-side wireless communication used in a video transmission system that transmits video signals from a plurality of reproduction devices (reproduction devices 511, 512, and 513) to a display device (display device 540). A device (for example, the transmission-side wireless communication device 110) that transmits a video signal output from a reproduction device (for example, the reproduction device 511) corresponding to the self-transmission-side wireless communication device among the plurality of reproduction devices via a wireless line. Corresponding to the self-transmitting-side wireless communication device among the plurality of playback devices according to remote control from the video signal transmitting unit (for example, wireless LAN communication unit 113 # 1) and the control device (control device 300 or 300 ′) A command output unit (for example, infrared transmission unit 111) that outputs a control command (individual command) that can be decoded by the playback device (for example, playback device 511) to the playback device; And summarized in that with.

  The reception-side wireless communication device according to the present invention is characterized by reception-side wireless communication used in a video transmission system that transmits video signals from a plurality of playback devices (playback devices 511, 512, and 513) to a display device (display device 540). An image (receiver-side wireless communication device 200) that receives a video signal via a plurality of wireless lines established for each of a plurality of transmitting-side wireless communication devices (transmitting-side wireless communication devices 110, 120, and 130) A signal receiving unit (wireless LAN communication unit 210 # 1), and a video signal output unit (HDMI interface 220) that outputs the received video signal as a video input signal to the display device. When switching is instructed, the gist of the invention is that the self-receiving-side wireless communication device switches a wireless line from which the video signal is to be received among the plurality of wireless lines.

  According to the present invention, there is provided a video transmission system, a transmission-side wireless communication device, and a reception-side wireless communication device that are capable of displaying a video reproduced by a plurality of reproduction devices installed in a plurality of rooms or the like on a single display device. Can be provided.

1 is an overall schematic configuration diagram of a video transmission system according to an embodiment of the present invention. It is a block diagram which shows the internal structure of the control apparatus which concerns on embodiment of this invention. It is a block diagram which shows the internal structure of the transmission side radio | wireless communication apparatus which concerns on embodiment of this invention. It is a block diagram which shows the internal structure of the receiving side radio | wireless communication apparatus which concerns on embodiment of this invention. It is a flowchart which shows the reproducing | regenerating apparatus control operation | movement which concerns on embodiment of this invention. 4 is a flowchart illustrating a video signal transmission operation according to the embodiment of the present invention. It is a whole schematic block diagram of the video transmission system which concerns on the example of a change of embodiment of this invention. It is a block diagram for demonstrating the video transmission system which concerns on background art.

  (1) Configuration of video transmission system, (2) Operation of video transmission system, (3) Effect of embodiment, (4) Modified example of embodiment, (5) ) It demonstrates in order of other embodiment. In the drawings in the following embodiments, the same or similar parts are denoted by the same or similar reference numerals.

(1) Configuration of Video Transmission System Hereinafter, the configuration of the video transmission system according to the present embodiment will be described in the order of (1.1) overall schematic configuration of the video transmission system and (1.2) detailed configuration of the video transmission system. .

(1.1) Overall Schematic Configuration of Video Transmission System FIG. 1 is an overall schematic configuration diagram of a video transmission system according to the present embodiment. In the present embodiment, it is assumed that the video transmission system is built in the home.

  As shown in FIG. 1, the video transmission system according to this embodiment includes a plurality of playback devices 511, 512, and 513, a plurality of transmission-side wireless communication devices 110, 120, and 130, a reception-side wireless communication device 200, A control device 300 and a display device 540 are included.

  The playback devices 511, 512, and 513 are installed in different rooms, for example. The playback devices 511, 512, and 513 are, for example, a TV tuner, a PC (Personal Computer), an HDD (Hard Disk Drive) recorder, a DVD (Digital Versatile Disc) player, or the like, and are devices that can play back video. The playback devices 511, 512, and 513 may be able to play back not only video but also audio, but in this embodiment, the video signal will be described.

  The playback device 511 is an analog playback device that does not support HDMI. The playback device 511 supports control command input using infrared rays and video signal output using a composite method. Note that not only composite video signal output but also S terminal output may be further supported.

  The playback device 512 is a digital playback device that supports HDMI. The playback device 512 supports HDMI control command input and HDMI video signal output.

  The playback device 513 is an analog playback device that does not support HDMI. The playback device 513 supports control command input by HTTP (Hyper Text Transfer Protocol) and video signal output by the RGB method.

  The transmission-side wireless communication devices 110, 120, and 130 support wireless communication using a wireless LAN, and are installed close to the playback devices 511, 512, and 513, respectively.

  The transmission-side wireless communication device 110 is connected to the playback device 511 via a composite cable. The transmission-side wireless communication device 110 supports control command output using infrared rays and video signal input using a composite method.

  The transmission-side wireless communication device 120 is connected to the playback device 512 via an HDMI cable. The transmission-side wireless communication device 120 supports HDMI control command output and HDMI video signal input.

  The transmission-side wireless communication device 130 is connected to the playback device 513 via an RGB cable and a wired LAN cable. The transmission-side wireless communication device 130 supports control command output by HTTP and video signal input by RGB.

  The reception-side wireless communication device 200 supports wireless communication using a wireless LAN, and is installed in the vicinity of the display device 540. The receiving-side wireless communication device 200 has established a wireless line with the transmitting-side wireless communication devices 110, 120, and 130. Specifically, the wireless line # 1 is between the transmission-side wireless communication apparatus 110 and the reception-side wireless communication apparatus 200, and the wireless line # 2 is between the transmission-side wireless communication apparatus 120 and the reception-side wireless communication apparatus 200. The wireless line # 3 is established between the transmission-side wireless communication device 130 and the reception-side wireless communication device 200, respectively. The reception-side wireless communication device 200 is connected to the display device 540 via an HDMI cable.

  The display device 540 is a liquid crystal display, a plasma display, a projector, or the like, and is a device that can display an image. The display device 540 is installed in a living room, for example. Display device 540 receives a control command from remote controller 541.

  The control device 300 is a server that supports wireless communication using a wireless LAN, and controls the transmission-side wireless communication devices 110, 120, and 130 and the reception-side wireless communication device 200. Control device 300 receives a control command (common command) from remote controller 301.

  In the video transmission system configured as described above, the transmission-side wireless communication devices 110, 120, and 130 transmit the video signals output from the playback devices 511, 512, and 513 via the wireless lines # 1 to # 3. The receiving-side wireless communication device 200 receives video signals via the wireless lines # 1 to # 3 and outputs the received video signals as video input signals to the display device 540. In addition, when the input switching is instructed from the control device 300, the reception-side wireless communication device 200 switches the wireless channel from which the device itself should receive the video signal among the wireless channels # 1 to # 3. Thus, the reception-side wireless communication device 200 has an input switching function.

  The control device 300 remotely controls the transmission-side wireless communication devices 110, 120, and 130 based on a common command (first control command) from the remote controller 301 that accepts user operations. Each of the transmitting-side wireless communication devices 110, 120, and 130, according to remote control from the control device 300 or 300 ′, sends an individual command (second control command) that can be decoded by the playback device corresponding to the own device. Output to.

  In the present embodiment, the control device 300 has a function of converting common commands indicating instruction contents such as playback start, playback stop, fast forward, and rewind into individual commands that can be decoded by the playback devices 511, 512, and 513. Have. The control device 300 transmits the individual command to the transmission-side wireless communication devices 110, 120, and 130, and the transmission-side wireless communication device that has received the individual command outputs the received individual command to the playback device corresponding to the own device.

  For example, when the playback device 511 is a playback target and the control device 300 receives a common command indicating the start of playback from the remote control 301, the control device 300 refers to the command table for the playback device 511 and selects an individual corresponding to the common command. The command is acquired, and the individual command is transmitted to the transmission-side wireless communication device 110. When receiving the individual command from the control device 300, the transmission-side wireless communication device 110 transmits the individual command to the playback device 511 using infrared rays. The playback device 511 starts video playback in accordance with the individual command received from the transmission-side wireless communication device 110. Note that the control device 300 stores in advance a command table corresponding to each of the playback devices 511, 512, and 513.

  In addition, each of the transmitting-side wireless communication devices 110, 120, and 130 converts the analog video signal into an HDMI signal when an analog video signal (composite signal or RGB signal) is input from a playback device corresponding to the transmitting device. Then send. For example, the transmission-side wireless communication device 110 converts the composite signal input from the reproduction device 511 into an HDMI signal, and transmits the HDMI signal to the reception-side wireless communication device 200 via the wireless LAN # 1 based on the wireless LAN. An existing technique can be used for conversion from an analog video signal to an HDMI signal.

  Note that wireless communication between the transmission-side wireless communication devices 110, 120, and 130 and the reception-side wireless communication device 200 is required to have a high speed and a large capacity. For example, a wireless LAN based on IEEE802.11n in the 5 GHz band, for example. Is preferably applied. On the other hand, since the wireless communication between the control device 300 and the transmitting-side wireless communication devices 110, 120, and 130 and the receiving-side wireless communication device 200 is not required to be high speed and large capacity, for example, 2.4 GHz. It is preferable to apply a wireless LAN based on IEEE802.11g.

(1.2) Detailed Configuration of Video Transmission System Next, regarding the detailed configuration of the video transmission system according to the present embodiment, (1.2.1) internal configuration of control device, (1.2.2) transmission side wireless The internal configuration of the communication apparatus and (1.2.3) the internal configuration of the reception-side wireless communication apparatus will be described in this order.

(1.2.1) Internal Configuration of Control Device FIG. 2 is a block diagram showing the internal configuration of the control device 300.

  As illustrated in FIG. 2, the control device 300 includes a remote control receiving unit 310, a wireless LAN communication unit 320, a storage unit 330, and a control unit 340.

  The remote control receiving unit 310 receives a common command from the remote control 301 by infrared rays or radio waves, and outputs the received common command to the control unit 340. Common commands do not require command conversion (for example, a playback device switching command, an input switching command, a power-on / off command for the receiving-side wireless communication device 200), and commands that require command conversion (for example, playback) Start command, playback stop command, fast forward command, rewind command, etc.).

  The wireless LAN communication unit 320 executes wireless communication using the wireless LAN with the transmission-side wireless communication devices 110, 120, and 130 and the reception-side wireless communication device 200.

  The storage unit 330 is configured using, for example, a memory, stores a program executed by the control unit 340, and is used as a work area by the control unit 340. The storage unit 330 stores a command table for each of the playback devices 511, 512, and 513. For example, command tables corresponding to various playback devices are stored in the storage unit 330 in advance, and by specifying the attributes (profiles) of the playback devices 511, 512, and 513 at the initial setting, the playback devices 511, 512, and the like are designated. A command table suitable for 513 is automatically set.

  The control unit 340 is configured using, for example, a CPU, and controls various functions of the control device 300 by executing a program stored in the storage unit 330. When a common command that requires command conversion is input from remote control receiver 310, control unit 340 determines a playback device to be played back, and from the command table for the playback device stored in storage unit 330. The individual command corresponding to the common command is acquired. Then, the control unit 340 controls the wireless LAN communication unit 320 to transmit the acquired individual command to the transmission-side wireless communication device corresponding to the playback device.

(1.2.2) Internal Configuration of Transmission-side Wireless Communication Device FIG. 3 is a block diagram showing the internal configuration of the transmission-side wireless communication devices 110, 120, and 130. Specifically, FIG. 3A is a block diagram illustrating an internal configuration of the transmission-side wireless communication apparatus 110, and FIG. 3B is a block diagram illustrating an internal configuration of the transmission-side wireless communication apparatus 120. FIG. 3C is a block diagram showing an internal configuration of the transmission side wireless communication apparatus 130.

  As shown in FIG. 3A, the transmission-side wireless communication device 110 includes an infrared transmission unit 111, a composite signal input unit 112, a wireless LAN communication unit 113 # 1, a wireless LAN communication unit 113 # 2, and a storage. Part 114 and control part 115.

  The infrared transmitter 111 receives an individual command received by the wireless LAN communication unit 113 # 2 from the control unit 115 and transmits the individual command by infrared. The infrared transmission unit 111 corresponds to a command output unit that outputs individual commands.

  The transmission-side wireless communication device 110 is installed such that the infrared transmission unit 111 faces the infrared reception unit (not shown) of the playback device 511. Alternatively, the infrared transmission unit 111 is a separate body, a cable is provided between the control unit 115 and the infrared transmission unit 111, and only the infrared transmission unit 111 is installed facing the infrared reception unit (not shown) of the playback device 511. May be.

  The composite signal input unit 112 is connected to a composite output (not shown) of the playback device 511 via a composite cable. The composite signal input unit 112 receives a composite signal via a composite cable and outputs the composite signal to the control unit 115.

  The wireless LAN communication unit 113 # 1 performs wireless LAN communication with the reception-side wireless communication device 200. Wireless LAN communication unit 113 # 2 performs wireless LAN communication with control device 300. The wireless LAN communication unit 113 # 1 corresponds to a video signal transmission unit that transmits a video signal via a wireless line.

  The storage unit 114 is configured using, for example, a memory, stores a program executed by the control unit 115, and is used as a work area by the control unit 115.

  The control unit 115 is configured using, for example, a CPU, and controls various functions of the transmission-side wireless communication device 110 by executing a program stored in the storage unit 114. When wireless LAN communication unit 113 # 2 receives an individual command from control device 300, control unit 115 controls infrared transmission unit 111 to output the received individual command.

  In addition, the control unit 115 converts the composite signal input from the composite signal input unit 112 into an HDMI signal, and wirelessly transmits the HDMI signal to the reception-side wireless communication device 200 via the wireless LAN # 1 using the wireless LAN. The LAN communication unit 113 # 1 is controlled.

  Next, as illustrated in FIG. 3B, the transmission-side wireless communication device 120 includes an HDMI interface 121, a wireless LAN communication unit 123 # 1, a wireless LAN communication unit 123 # 2, a storage unit 124, and a control unit. Part 125.

  The HDMI interface 121 is connected to the playback device 512 via an HDMI cable. The HDMI interface 121 receives the individual command received by the wireless LAN communication unit 123 # 2 from the control unit 125, and transmits the individual command by HDMI. The HDMI interface 121 corresponds to a command output unit that outputs individual commands.

  Also, the HDMI interface 121 receives an HDMI signal via an HDMI cable and outputs the HDMI signal to the control unit 125.

  The wireless LAN communication unit 123 # 1 performs wireless LAN communication with the reception-side wireless communication device 200. The wireless LAN communication unit 123 # 2 performs wireless LAN communication with the control device 300. The wireless LAN communication unit 123 # 1 corresponds to a video signal transmission unit that transmits a video signal via a wireless line.

  The storage unit 124 is configured using, for example, a memory, stores a program executed by the control unit 125, and is used as a work area by the control unit 125.

  The control unit 125 is configured using, for example, a CPU, and controls various functions of the transmission-side wireless communication device 120 by executing a program stored in the storage unit 124. When the wireless LAN communication unit 123 # 2 receives the individual command from the control device 300, the control unit 125 controls the HDMI interface 121 so as to output the received individual command.

  The control unit 125 also controls the wireless LAN communication unit 123 # 1 to transmit the HDMI signal input from the HDMI interface 121 to the reception-side wireless communication device 200 via the wireless LAN wireless line # 2.

  Next, as illustrated in FIG. 3C, the transmission-side wireless communication device 130 includes a wired LAN interface 131, an RGB signal input unit 132, a wireless LAN communication unit 133 # 1, and a wireless LAN communication unit 133 # 2. And a storage unit 134 and a control unit 135.

  The wired LAN interface 131 is connected to the playback device 513 via a wired LAN cable. The wired LAN interface 131 receives the individual command (HTTP) received by the wireless LAN communication unit 133 # 2 from the control unit 135, and transmits the individual command via the wired LAN cable. The wired LAN interface 131 corresponds to a command output unit that outputs individual commands.

  The RGB signal input unit 132 is connected to an RGB output (not shown) of the playback device 513 via an RGB cable. The RGB signal input unit 132 receives an RGB signal via an RGB cable and outputs the RGB signal to the control unit 135.

  The wireless LAN communication unit 133 # 1 performs wireless LAN communication with the reception-side wireless communication device 200. The wireless LAN communication unit 133 # 2 performs wireless LAN communication with the control device 300. The wireless LAN communication unit 133 # 1 corresponds to a video signal transmission unit that transmits a video signal via a wireless line.

  The storage unit 134 is configured using a memory, for example, and stores a program executed by the control unit 135 and is used as a work area by the control unit 135.

  The control unit 135 is configured using, for example, a CPU, and controls various functions of the transmission-side wireless communication device 130 by executing a program stored in the storage unit 134. When the wireless LAN communication unit 133 # 2 receives the individual command from the control device 300, the control unit 135 controls the wired LAN interface 131 so as to output the received individual command.

  In addition, the control unit 135 converts the RGB signal input from the RGB signal input unit 132 into an HDMI signal, and wirelessly transmits the HDMI signal to the reception-side wireless communication device 200 via the wireless LAN # 3 by the wireless LAN. The LAN communication unit 133 # 1 is controlled.

  Note that each of the transmission-side wireless communication devices 110, 120, and 130 may include all of the infrared transmission unit 111, the composite signal input unit 112, the HDMI interface 121, the wired LAN interface 131, and the RGB signal input unit 132. Good. With this configuration, a transmission-side wireless communication device that can be connected to various playback devices is provided, although the cost increases.

(1.2.3) Internal Configuration of Receiving Side Wireless Communication Device FIG. 4 is a block diagram showing an internal configuration of the receiving side wireless communication device 200.

  As illustrated in FIG. 4, the reception-side wireless communication device 200 includes a wireless LAN communication unit 210 # 1, a wireless LAN communication unit 210 # 2, an HDMI interface 220, a storage unit 230, and a control unit 240.

  The wireless LAN communication unit 210 # 1 performs wireless LAN communication with the transmission-side wireless communication devices 110, 120, and 130. Wireless LAN communication unit 210 # 2 performs wireless LAN communication with control device 300. The wireless LAN communication unit 210 # 1 corresponds to a video signal receiving unit that receives a video signal via the wireless lines # 1 to # 3 established for each of the transmission-side wireless communication devices 110, 120, and 130.

  The HDMI interface 220 is connected to the display device 540 via an HDMI cable. The HDMI interface 220 corresponds to a video signal output unit that outputs a video signal as a video input signal to the display device 540.

  The storage unit 230 is configured using a memory, for example, and stores a program executed by the control unit 240 and is used as a work area by the control unit 240.

  The control unit 240 is configured using, for example, a CPU, and controls various functions of the reception-side wireless communication device 200 by executing a program stored in the storage unit 230. When the wireless LAN communication unit 210 # 1 receives a video signal via any one of the wireless lines # 1 to # 3, the control unit 240 outputs the received video signal as a video input signal to the display device 540. The interface 220 is controlled.

  In addition, when the wireless LAN communication unit 210 # 2 receives the input switching command from the control device 300, the control unit 240 is a wireless that the wireless LAN communication unit 210 # 1 of the wireless lines # 1 to # 3 should receive the video signal. Control line switching. For example, when the control unit 240 receives the input switching command while outputting the video signal received via the wireless line # 1 as the video input signal to the display device 540, the control unit 240 receives the input signal via the wireless line # 2. The selected video signal is switched to be output as a video input signal to the display device 540.

(2) Operation of Video Transmission System Hereinafter, regarding the operation of the video transmission system according to the present embodiment, (2.1) playback device remote control operation, (2.2) video signal transmission operation, (2.3) cooperative control The operation will be described in the order.

(2.1) Playback Device Remote Control Operation FIG. 5 is a flowchart showing the playback device control operation according to this embodiment. Here, a case where the playback device 511 is remotely controlled will be described.

  As shown in FIG. 5, in step S <b> 11, remote control receiving unit 310 of control device 300 receives a common command from remote control 301.

  In step S12, the control unit 340 of the control device 300 converts the common command received by the remote control reception unit 310 into an individual command for the playback device 511. Specifically, the control unit 340 acquires an individual command corresponding to the common command received by the remote control receiving unit 310 from the command table for the playback device 511 stored in the storage unit 330.

  In step S13, the control unit 340 of the control device 300 controls the wireless LAN communication unit 320 to transmit the individual command acquired in step S12 to the transmission-side wireless communication device 110.

  In step S14, the wireless LAN communication unit 113 # 2 of the transmission-side wireless communication device 110 receives the individual command from the control device 300.

  In step S15, the control unit 115 of the transmission-side wireless communication device 110 controls the infrared transmission unit 111 to output the individual command received by the wireless LAN communication unit 113 # 2. As a result, the playback device 511 is controlled by the individual command.

(2.2) Video Signal Transmission Operation FIG. 6 is a flowchart showing the video signal transmission operation according to the present embodiment. Here, a case where the playback device to be played back is the playback device 511 will be described.

  As shown in FIG. 6, in step S21, the composite signal input unit 112 of the transmission-side wireless communication device 110 receives the composite signal from the playback device 511 via the composite cable.

  In step S22, the control unit 115 of the transmission-side wireless communication device 110 converts the composite signal input to the composite signal input unit 112 into an HDMI signal.

  In step S23, the control unit 115 of the transmission-side wireless communication device 110 transmits the HDMI signal obtained by converting the composite signal to the reception-side wireless communication device 200 via the wireless LAN # 1 using the wireless LAN. Controls the communication unit 113 # 1.

  In step S24, the wireless LAN communication unit 210 # 1 of the reception-side wireless communication device 200 receives the HDMI signal via the wireless line # 1.

  In step S25, the control unit 240 of the reception-side wireless communication device 200 controls the HDMI interface 220 so that the HDMI signal received by the wireless LAN communication unit 210 # 1 is output as a video input signal to the display device 540. As a result, the display device 540 displays a video corresponding to the HDMI signal.

(2.3) Cooperation Control Operation Hereinafter, the cooperation control operation of the video transmission system according to the present embodiment will be described. Note that the cooperative control operation means an operation for controlling the operation of another device in conjunction with the control of any device in the video transmission system.

(2.3.1) Cooperation control operation 1
The control device 300 that instructs the reception-side wireless communication device 200 to perform input switching causes the transmission-side wireless communication corresponding to the playback device to turn on the playback device that should output the video signal after the switching at the time of input switching. The transmission side wireless communication device corresponding to the playback device is remotely controlled so that the device is remotely controlled and the playback device that has output the video signal before switching is turned off.

  For example, in a case where the playback device to be played is switched from the playback device 511 to the playback device 512, the control device 300 remotely controls the transmission-side wireless communication device 120 so that the playback device 512 is powered on, and the playback device The transmitting-side wireless communication device 110 is remotely controlled so that the power of 511 is turned off. That is, the control device 300 transmits an individual command for powering on the playback device 512 to the transmission-side wireless communication device 120, and transmits an individual command for powering off the playback device 511 to the transmission-side wireless communication device 110. .

  As a result, the transmission-side wireless communication device 120 transmits an individual command for powering on the playback device 512 to the playback device 512 to turn on the playback device 512, and the transmission-side wireless communication device 110 powers off the playback device 511. An individual command for this is transmitted to the playback device 511 and the playback device 511 is powered off.

(2.3.2) Cooperation control operation 2
The control device 300 remotely controls the transmission-side wireless communication devices 110, 120, and 130 so that all of the playback devices 511, 512, and 513 are powered off based on the power-off of the display device 540.

  The reception-side wireless communication device 200 knows the power on / off state of the display device 540, and the control device 300 can detect the power-off of the display device 540 based on the notification from the reception-side wireless communication device 200. Note that the reception-side wireless communication device 200 can grasp the power on / off state of the display device 540 using, for example, clock detection of the TMDS signal in the HDMI signal.

  For example, when the control device 300 detects that the display device 540 is powered off, the control device 300 transmits an individual command for powering off the playback device 511 to the transmission-side wireless communication device 110 and an individual command for powering off the playback device 512. Is transmitted to the transmission-side wireless communication apparatus 120, and an individual command for powering off the playback apparatus 513 is transmitted to the transmission-side wireless communication apparatus 130.

  As a result, the transmission-side wireless communication device 110 transmits an individual command for powering off the playback device 511 to the playback device 511 to turn off the playback device 511, and the transmission-side wireless communication device 120 powers off the playback device 512. The transmitting device 512 transmits an individual command for powering off the playback device 512, and the transmitting-side wireless communication device 130 transmits an individual command for powering off the playback device 513 to the playback device 513. Turn off the power.

(2.3.3) Cooperation control operation 3
Based on the fact that one of the playback devices 511, 512, and 513 is powered on, the control device 300 corresponds to the one playback device for the wireless line on which the receiving-side wireless communication device 200 should receive the video signal. Switch to a wireless line.

  The transmission-side wireless communication devices 110, 120, and 130 grasp the power on / off states of the playback devices 511, 512, and 513, respectively, and the control device 300 notifies the transmission-side wireless communication devices 110, 120, and 130. Thus, it is possible to detect the power-on of the playback devices 511, 512, or 513. Note that the transmission-side wireless communication device 110 can grasp the power on / off state of the playback device 511 using, for example, a V-Sync signal in the composite signal. Further, the transmission-side wireless communication device 120 can grasp the power on / off state of the playback device 512 using, for example, clock detection of the TMDS signal in the HDMI signal. Furthermore, the transmission-side wireless communication device 130 can grasp the power on / off state of the playback device 512 using, for example, various synchronization signals in RGB signals.

  For example, when the control device 300 detects that the playback device 512 is powered on, the control device 300 transmits a control command for switching the wireless channel to receive the video signal to the wireless channel # 2 to the receiving-side wireless communication device 200. As a result, the receiving-side wireless communication device 200 switches the wireless line that should receive the video signal to the wireless line # 2.

(2.3.4) Cooperation control operation 4
The control device 300 controls the display device 540 to be powered off based on the fact that all of the playback devices 511, 512, and 513 are powered off.

  The transmitting-side wireless communication devices 110, 120, and 130 grasp the power on / off states of the playback devices 511, 512, and 513, respectively, and the control device 300 receives the notification from the transmitting-side wireless communication devices 110, 120, and 130. It is possible to detect that all of the playback devices 511, 512, and 513 have been turned off. Note that the transmission-side wireless communication device 110 can grasp the power on / off state of the playback device 511 using, for example, a V-Sync signal in the composite signal. Further, the transmission-side wireless communication device 120 can grasp the power on / off state of the playback device 512 using, for example, clock detection of the TMDS signal in the HDMI signal. Furthermore, the transmission-side wireless communication device 130 can grasp the power on / off state of the playback device 512 using, for example, various synchronization signals in RGB signals.

  For example, when the control device 300 detects that all of the playback devices 511, 512, and 513 have been powered off, the control device 300 transmits a control command for powering off the display device 540 to the reception-side wireless communication device 200. When receiving the control command for powering off the display device 540, the receiving-side wireless communication device 200 powers off the display device 540 using the HDMI control command.

(3) Effects of the Embodiment As described above, according to the present embodiment, by providing the transmitting-side wireless communication devices 110, 120, and 130 for each of the playback devices 511, 512, and 513, the playback devices 511, 512, and so on. Even when 513 is distributed in a plurality of rooms or the like, the transmission-side wireless communication devices 110, 120, and 130 can be installed in the vicinity of the playback devices 511, 512, and 513. And the transmitting-side wireless communication devices 110, 120, and 130 can be easily connected. Further, by providing the receiving side wireless communication device 200 with the input switching function, it is possible to use one display device 540 for the playback devices 511, 512, and 513. Therefore, a video transmission system is provided that can display video reproduced by the reproducing devices 511, 512, and 513 installed in a plurality of rooms or the like on one display device 540.

  Furthermore, in the present embodiment, the control device 300 remotely controls the transmission-side wireless communication devices 110, 120, and 130 based on the common command, and each of the transmission-side wireless communication devices 110, 120, and 130 automatically performs according to the remote control. An individual command that can be decoded by the playback device corresponding to the device is output to the playback device. Accordingly, it is possible to remotely control an analog playback device that does not support the HDMI-CEC signal. In addition, a user who operates the remote controller 301 remotely controls each of the playback devices 511, 512, and 513 installed in a plurality of rooms while listening to the display device 540 installed in the living room, for example. be able to.

  In the present embodiment, the control device 300 remotely controls the transmission-side wireless communication device corresponding to the playback device so that the playback device to output the video signal after switching is turned on, so that the user can Since the operation for turning on can be omitted, the convenience of the user can be improved. Further, the control device 300 remotely controls the transmission-side wireless communication device corresponding to the playback device so that the playback device that has output the video signal before switching is turned off, thereby reducing the power consumption of the playback device. This makes it possible to reduce energy consumption.

  In the present embodiment, by remotely controlling the transmission-side wireless communication devices 110, 120, and 130 so that all the playback devices 511, 512, and 513 are powered off based on the power-off of the display device 540, It becomes possible to reduce the power consumption of each reproducing apparatus, and energy saving can be achieved.

  In the present embodiment, based on the fact that one of the playback devices 511, 512, and 513 is powered on, a wireless line on which the receiving-side wireless communication device 200 should receive a video signal is assigned to the one playback device. By switching to the corresponding wireless line, it is possible to omit the input switching operation by the user, so that the convenience for the user can be improved.

  In the present embodiment, power consumption of the display device 540 can be reduced and energy saving can be achieved by powering off the display device 540 based on the fact that all of the playback devices 511, 512, and 513 are powered off. Can do.

  In this embodiment, each of the transmission-side wireless communication devices 110, 120, and 130 transmits an analog video signal after converting the analog video signal into an HDMI signal when an analog video signal is input from a playback device corresponding to the device. To do. This makes it possible to digitally transmit a video signal even when an analog playback device is used.

(4) Modification Example of Embodiment In the above-described embodiment, the control device 300 is configured as a single unit. However, in the present modification example, the control device 300 is built in the reception-side wireless communication device 200.

  FIG. 7 is an overall schematic configuration diagram of a video transmission system according to this modification. Here, differences from the above-described embodiment will be described.

  As shown in FIG. 7, in the video transmission system according to this modification, the reception-side wireless communication device 200 includes a control device 300 ′. In this case, the housing is shared by the reception-side wireless communication device 200 and the control device 300 '. Further, the CPU as the control unit, the memory as the storage unit, and the like may be shared by the reception-side wireless communication device 200 and the control device 300 ′.

  According to this modified example, since the control device 300 is built in the reception-side wireless communication device 200, it is not necessary to separately provide a server as a control device, and costs and the like can be reduced.

(5) Other Embodiments As described above, the present invention has been described according to the embodiment. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  In the above-described embodiment, the case where any one of the playback devices 511, 512, and 513 plays back video in order to save energy has been described. However, all of the playback devices 511, 512, and 513 play back video in parallel. You may replay it. All of the reproduction devices 511, 512, and 513 reproduce the video in parallel, and all of the transmission side wireless communication devices 110, 120, and 130 transmit the video signal in parallel. The receiving-side wireless communication device 200 receives each video signal, but outputs one of these video signals as a video input signal to the display device 540 and temporarily stores the remaining video signals in the storage unit 230. (Buffering or caching). Then, when the input switching is instructed from the control device 300, the reception-side wireless communication device 200 outputs the switched video signal from the video signals stored in the storage unit 230. Thereby, input switching can be performed immediately, and the instantaneous interruption period of the video displayed on the display device 540 can be shortened.

  In the above-described embodiment, the wireless LAN is used for wireless communication between the transmission-side wireless communication devices 110, 120, and 130 and the reception-side wireless communication device 200. However, wireless HDMI is used instead of the wireless LAN. Also good. However, since wireless HDMI makes it difficult to perform wireless communication over a wall, it is preferable to use a wireless LAN rather than wireless HDMI.

  Further, the transmitting side wireless communication devices 110, 120, and 130 may be configured to be accessible to the Internet. In this case, the transmission-side wireless communication devices 110, 120, and 130 receive a video signal from a video distribution server as a playback device provided on the Internet, and transmit the received video signal to the reception-side wireless communication device 200. To do. In this case, a command system of a device that is not included in the command conversion table in the control device 300 or an additional command of a new device may be downloaded and acquired from a server on the Internet.

  Thus, it should be understood that the present invention includes various embodiments and the like not described herein. Therefore, the present invention is limited only by the invention specifying matters in the scope of claims reasonable from this disclosure.

  DESCRIPTION OF SYMBOLS 110,120,130 ... Transmission side radio | wireless communication apparatus, 111 ... Infrared transmission part, 112 ... Composite signal input part, 113 # 1, 113 # 2 ... Wireless LAN communication part, 114 ... Memory | storage part, 115 ... Control part, 120 ... Transmission side wireless communication device, 121 ... HDMI interface, 123 # 1, 123 # 2 ... Wireless LAN communication unit, 124 ... Storage unit, 125 ... Control unit, 130 ... Transmission side wireless communication device, 131 ... Wired LAN interface, 132 ... RGB signal input unit, 133 # 1, 133 # 2, wireless LAN communication unit, 134 storage unit, 135 control unit, 200 reception side wireless communication device, 210 # 1, 210 # 2, wireless LAN communication unit, 220 ... HDMI interface, 230 ... storage unit, 240 ... control unit, 300 ... control device, 301 ... remote control, 310 ... remote control reception unit 320 ... wireless LAN communication unit, 330 ... storage unit, 340 ... control unit, 511, 512, 513 ... reproduction device, 512 ... reproduction device, 513 ... reproduction device, 520 ... transmission side wireless communication device, 521 ... remote control, 530 ... Receiving side wireless communication device, 540... Display device, 541.

Claims (12)

A video transmission system for transmitting video signals from a plurality of playback devices to a display device,
A plurality of transmission side wireless communication devices provided for each of the plurality of playback devices;
A wireless communication device that performs wireless communication with the plurality of wireless communication devices on the transmission side and outputs a video input signal to the display device;
Have
Each of the plurality of transmission-side wireless communication devices transmits a video signal input from a playback device corresponding to the transmission-side wireless communication device to the reception-side wireless communication device via a wireless line,
The receiving wireless communication device receives a video signal via a plurality of wireless lines established for each of the plurality of transmitting wireless communication devices, and uses the received video signal as the video input signal to the display device. Output
The reception-side wireless communication apparatus switches a wireless line from which the reception-side wireless communication apparatus should receive a video signal among the plurality of wireless lines when switching of the video input signal is instructed. Video transmission system. A control device for remotely controlling the plurality of transmitting side wireless communication devices;
The control device remotely controls the plurality of transmission side wireless communication devices based on a first control command from an input device that accepts a user operation,
Each of the plurality of transmission-side wireless communication devices outputs a second control command that can be decoded by the reproduction device corresponding to the own-transmission-side wireless communication device to the reproduction device according to remote control from the control device. The video transmission system according to claim 1, wherein:   When the video input signal is switched to the display device, the control device remotely transmits a transmission-side wireless communication device corresponding to the playback device so that the playback device to which the video signal after switching is to be output is turned on. The video transmission system according to claim 2, wherein the video transmission system is controlled.   The control device sets a transmitting-side wireless communication device corresponding to the playback device so that the playback device that output the video signal before the switching is turned off when the video input signal is switched to the display device. 4. The video transmission system according to claim 2, wherein the video transmission system is remotely controlled.   The control device remotely controls the plurality of transmitting-side wireless communication devices so as to power off all of the plurality of playback devices based on the power-off of the display device. The video transmission system according to any one of 2 to 4. The control device is configured to control the reception-side wireless communication device,
The control device corresponds to the one playback device for a wireless line on which the receiving-side wireless communication device should receive a video signal based on the fact that one of the plurality of playback devices is powered on. 6. The video transmission system according to claim 2, wherein the video transmission system is switched to a wireless line. The control device is configured to control the display device,
The video according to any one of claims 2 to 6, wherein the control device controls the display device to be powered off based on power-off of all of the plurality of playback devices. Transmission system.   Each of the plurality of transmission-side wireless communication devices converts the analog video signal into a specific digital video signal when an analog video signal is input from a playback device corresponding to the transmission-side wireless communication device. The video transmission system according to any one of claims 1 to 7, wherein the video transmission system transmits to a reception-side wireless communication device.   The video transmission system according to claim 2, wherein the control device is built in the reception-side wireless communication device. The plurality of playback devices output video signals in parallel,
The plurality of transmission-side wireless communication devices transmit video signals output from the plurality of playback devices in parallel,
The receiving side wireless communication device is:
Receiving a plurality of video signals in parallel via the plurality of wireless lines;
Outputting one of the plurality of video signals as the video input signal;
Temporarily storing the remaining video signals of the plurality of video signals;
When switching of the video input signal is instructed, the video signal after switching is output from the stored video signal.
The video transmission system according to claim 1. A transmission-side wireless communication device used in a video transmission system that transmits video signals from a plurality of playback devices to a display device,
A video signal transmitting unit that transmits a video signal output from a playback device corresponding to a self-transmission-side wireless communication device among the plurality of playback devices via a wireless line;
In response to remote control from the control device, a command output unit that outputs to the playback device a control command that can be decoded by the playback device corresponding to the self-transmitting-side wireless communication device among the plurality of playback devices;
A transmission-side wireless communication apparatus comprising: A reception-side wireless communication device used in a video transmission system that transmits video signals from a plurality of playback devices to a display device,
A video signal receiving unit that receives a video signal via a plurality of wireless lines established for each of a plurality of transmitting-side wireless communication devices;
A video signal output unit for outputting the received video signal as a video input signal to the display device;
Have
A receiving-side wireless communication device, wherein when the switching of the video input signal is instructed, the self-receiving-side wireless communication device among the plurality of wireless channels switches a wireless channel on which a video signal should be received.

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