JP4879830B2 - Wireless communication system - Google Patents

Description

  The present invention relates to a sink device, a source device, a sink device adapter device, and a source device adapter for wirelessly transmitting and receiving setting information of a display means in a wireless communication system that wirelessly transmits and receives a video signal according to the HDMI (High-Definition Multimedia Interface) standard. The present invention relates to an apparatus, a wireless communication system, and a control method thereof.

  Patent Document 1 discloses a transmission system in which a physical address is set by transmitting and receiving EDID (Extended Display Identification Data) via a wire in HDMI (High-Definition Multimedia Interface). The transmission system according to Patent Document 1 includes a receiver, a transmitter, and a serial link, and encoded data (for example, video, audio, and additionally other auxiliary data) is transmitted from the transmitter to the receiver. Is done.

JP 2005-514873 A. High-Definition Multimedia Interface Specification, Version1.1, HDMI Licensing, LLC, California in U.S.A., May 20,2004.

  However, in the transmission method and system according to Patent Document 1 described above, wired is used to send and receive EDID and set a physical address, so that not only the appearance looks confused by the wiring, but also the communication device has one wiring. However, when communicating with other communication devices, there is a problem that it takes time and effort to change cables.

  In addition, since DDC (Display Data Channel) is used to read EDID information between communication devices, it takes time to read EDID information.

  An object of the present invention is to solve the above problems, eliminate the wiring, make the appearance orderly, and easily enable one sink device to communicate with a plurality of source devices, and display information on display means that is faster than the conventional one. A sink device, a source device, an adapter device for a sink device, an adapter device for a source device, a wireless communication system, and a control method thereof.

  A sink device according to a first aspect of the present invention is a wireless communication comprising a source device that wirelessly transmits a video signal, and a sink device that receives the wirelessly transmitted video signal and displays the received video signal on display means In a sink device for a system, a first storage unit that stores setting information of the display unit, a wireless transmission unit that wirelessly transmits a predetermined wireless data signal to the source device, and the first storage unit Read setting information, control means for controlling the wireless transmission means so as to wirelessly transmit a wireless data signal including the read setting information, and a second setting information reading from the first storage means Storage means, and the second storage means further includes first identification information of the source device included in the wireless data signal from the source device and the source device. A node information table that stores the second identification information in association with each other, and the control unit reads the setting information from the first storage unit, stores the setting information in the second storage unit, and The second identification corresponding to the first identification information included in the wireless data signal received wirelessly when the setting information is read from the second storage means and the wireless data signal from the source device is wirelessly received. The wireless transmission is performed such that information is read from the node information table and a wireless data signal including the second identification information and the setting information read from the second storage unit is wirelessly transmitted to the source device. The means is controlled.

  In the above sink device, the reading speed of the second storage means is faster than the reading speed of the first storage means.

  Further, in the sink device, the control means includes wireless data including the second identification information and the setting information read from the second storage means in response to a request signal from the source device. The wireless transmission means is controlled to wirelessly transmit a signal.

  Further, in the sink device, the control unit selects and stores at least a part of the setting information when reading the setting information from the first storage unit and storing the setting information in the second storage unit. It is characterized by that. Here, at least a part of the setting information is setting information that can be transmitted at a wireless transmission rate that can be received by the sink device.

  Still further, in the sink device, the first identification information is a device ID, and the second identification information is a physical address.

A wireless communication system according to a second aspect of the present invention is a wireless communication system including a source device that wirelessly transmits a video signal and the sink device according to any one of claims 1 to 6.
The source device includes wireless transmission / reception means for wirelessly receiving a wireless data signal including the setting information wirelessly transmitted from the sink device and wirelessly transmitting a video signal to the sink device based on the setting information. Features.

  According to a third aspect of the present invention, there is provided a control method for a wireless communication system comprising: a source device that wirelessly transmits a video signal; and a sink device that receives the wirelessly transmitted video signal and displays the received video signal on a display unit. In the control method of a wireless communication system provided, the sink device includes a first storage unit that stores setting information of the display unit, and a second storage unit that stores setting information read from the first storage unit. And the second storage means further associates the first identification information of the source device included in the wireless data signal from the source device with the second identification information assigned to the source device. A node information table to be stored is stored, and the sink device reads the setting information from the first storage unit, stores it in the second storage unit, and from the second storage unit When the wireless data signal is wirelessly received from the source device, the second identification information corresponding to the first identification information included in the wireless data signal received wirelessly is stored in the node information table. And wirelessly transmitting a wireless data signal including the second identification information and the setting information read from the second storage means to the source device, and the source device includes the sink device Wirelessly receiving a wireless data signal including the setting information wirelessly transmitted from the wireless communication device, and wirelessly transmitting a video signal to the sink device based on the setting information.

  An adapter device for a sink device according to a fourth aspect of the present invention is an adapter device for a source device that wirelessly transmits a video signal, receives the wirelessly transmitted video signal, and outputs the received video signal to display means of the sink device A sink device adapter device for a wireless communication system comprising a sink device adapter device for displaying the wireless device, a wireless transmission means for wirelessly transmitting a predetermined wireless data signal to a source device adapter device, and the sink Storage means for storing setting information read from the device, and the wireless transmission means for reading the setting information from the storage means and wirelessly transmitting a wireless data signal including the read setting information to the adapter device for the source device And the storage means is further included in a wireless data signal from the adapter device for the source device. A node information table for storing the first identification information of the source device associated with the second identification information assigned to the source device in association with each other, and the control means is a wireless communication from the adapter device for the source device. When the data signal is wirelessly received, the second identification information corresponding to the first identification information included in the wirelessly received wireless data signal is read from the node information table, the second identification information, The wireless transmission unit is controlled to wirelessly transmit a wireless data signal including setting information read from the storage unit to the adapter device for the source device.

  In the adapter device for the sink device, the control means responds to a request signal from the adapter device for the source device, and the second identification information and the setting information read from the second storage means The wireless transmission means is controlled to wirelessly transmit a wireless data signal including

  A wireless communication system according to a fifth aspect of the present invention is a wireless communication system comprising a source device adapter device for wirelessly transmitting a video signal and the sink device adapter device according to claim 9 or 10, wherein the source device The wireless adapter device wirelessly receives a wireless data signal including the setting information wirelessly transmitted from the sink device adapter device, and wirelessly transmits a video signal to the sink device adapter device based on the setting information. Means are provided.

  In the control method of the wireless communication system according to the sixth aspect of the invention, the adapter device for the source device that wirelessly transmits the video signal, the wirelessly transmitted video signal is received, and the received video signal is used as display means of the sink device. A method of controlling a wireless communication system including an adapter device for a sink device that outputs and displays, wherein the adapter device for the sink device includes a storage unit that stores setting information read from the sink device, and the storage unit Further stores a node information table for storing the first identification information of the source device included in the wireless data signal from the adapter device for the source device and the second identification information assigned to the source device in association with each other. The sink device adapter device stores the setting information read from the sink device in the storage device. And the adapter device for the sink device reads the setting information from the storage means and wirelessly receives the wireless data signal from the adapter device for the source device, the first data included in the wireless data signal received wirelessly The second identification information corresponding to one identification information is read from the node information table, and a radio data signal including the second identification information and the setting information read from the storage unit is transmitted to the source device. Wirelessly transmitting to the adapter device for a source, and the adapter device for the source device wirelessly receiving a wireless data signal including the setting information wirelessly transmitted from the adapter device for the sink device, and a video signal based on the setting information Wirelessly transmitting to the adapter device for the sink device.

  Therefore, according to the sink device, the source device, the adapter device for the sink device, the adapter device for the source device, the wireless communication system and the control method thereof according to the present invention, the setting information of the display means of the sink device is transmitted via the wireless line. Since transmission and reception are performed, the appearance can be made orderly without wiring, and one sink device can easily communicate with a plurality of source devices, and the setting information of the display means can be read at a higher speed than conventional.

  Further, the second identification information corresponding to the first identification information included in the wireless data signal from the source device is read from the node information table, and the wireless data signal including the second identification information is wirelessly transmitted to the source device. Thus, the second identification information can be easily set in each source device.

First embodiment.
FIG. 1 is a block diagram showing a configuration of a radio communication system according to the first embodiment of the present invention. In FIG. 1, the wireless communication system according to the present embodiment includes a sink device 1 including, for example, a television receiver, and source devices 2 and 3 including, for example, a DVD player. The devices 2 and 3 wirelessly transmit and receive wireless signals including CEC (Consumer Electronics Control) messages to each other. In FIG. 1, as an example, a case where one sink device 1 and two source devices 2 and 3 perform wireless communication is illustrated. However, one sink device 1 and one source device perform wireless communication. Alternatively, one sink device 1 and three or more source devices may perform wireless communication, or the sink device 1 may perform wireless communication with a repeater device instead of the source device.

  FIG. 2 is a block diagram showing a detailed configuration of the sink device 1 of FIG. In FIG. 2, the sink device 1 includes a controller 10, an audio signal and video signal processing circuit 9, a ROM 11, a DRAM 12, a display 13, a speaker 14, a wireless transmission / reception circuit 15, and an antenna 16. Is done. The wireless transmission / reception circuit 15 performs frequency conversion processing, reception packet processing, and decoding processing on the wireless AV signal transmitted from the source device 2 or 3 via the antenna 16, and then processes the processed video signal and audio signal. Are output to the audio signal and video signal processing circuit 9, and frequency conversion processing, reception packet processing, and decoding processing are performed on the wireless data signal received via the antenna 16, and then processing is performed. Are output to the controller 10. The wireless transmission / reception circuit 15 generates a wireless data signal by encoding a data signal output from the controller 10, generates a transmission packet, and modulates a carrier wave having a predetermined frequency in accordance with the transmission packet. 16 to the source device 2 or 3.

  The audio signal and video signal processing circuit 9 separates the AV signal output from the wireless transmission / reception circuit 15 into a video signal and an audio signal, outputs the video signal to the display 13 and displays it, and outputs the audio signal to the speaker 14. To do. The ROM 11 stores an EDID table 11a including EDID information that is setting information such as the resolution of the display 13 in order to execute plug and play. The DRAM 12 stores an EDID table 12a and a node information table 12b described later with reference to FIG. In general, the reading speed of the DRAM 12 is faster than the reading speed of the ROM 11.

  The controller 10 receives control signals (authentication request signal, authentication completion signal, EDID request signal, EDID response signal, connection completion notification signal, and connection completion response signal) for setting the physical address of the source device 2 or 3 in the sink device 1. 9) and output to the wireless transmission / reception circuit 15, and based on the data signal received from the source device 2 or 3 via the antenna 16 and the wireless transmission / reception circuit 15, wireless connection processing (FIG. 9). To be described later with reference to FIG. In addition, the controller 10 executes reading from the ROM 11, reading from the DRAM 12, writing to the DRAM 12, and control of the audio signal and video signal processing circuit 9.

  FIG. 3 is a block diagram showing a detailed configuration of the source devices 2 and 3 in FIG. In FIG. 3, the source devices 2 and 3 include a controller 20, a DRAM 21, a DVD player 22, a wireless transmission / reception circuit 25, and an antenna 26. Based on the control from the controller 20, the DVD player 22 reads out video signals and audio signals recorded on a recording medium such as a DVD and outputs them to the wireless transmission / reception circuit 25. The wireless transmission / reception circuit 25 encodes the video signal and the audio signal read out by the DVD player 22, generates a transmission packet, and modulates a carrier wave having a predetermined frequency according to the generated transmission packet. A signal is generated and transmitted to the sink device 1 via the antenna 26, and a data signal output from the controller 20 is encoded, a transmission packet process is generated, and a carrier wave having a predetermined frequency is generated. By modulating according to the packet, a wireless data signal is generated and transmitted to the sink device 2 via the antenna 26. The wireless transmission / reception circuit 25 receives a wireless data signal having a predetermined frequency from the sink device 1 via the antenna 26, performs frequency conversion processing, reception packet processing, and decoding processing, and then processes the processed data signal. Is output to the controller 20.

  The controller 20 generates a data signal including a control signal for setting the physical address of the source device 2 or 3 in the sink device 1 and outputs the data signal to the wireless transmission / reception circuit 25, and also via the antenna 26 and the wireless transmission / reception circuit 25. Based on the data signal received from the sink device 1, a wireless connection process (described later with reference to FIG. 10) is executed. Further, the controller 20 executes reading from the DRAM 21, writing to the DRAM 21, and control of the DVD player 22.

  FIG. 4 is a table showing an example of the node information table 12b of the sink device 1 of FIG. In the node information table 12b of FIG. 4, the identification numbers of the source devices 2 and 3 that communicate wirelessly with the sink device 1 and the wireless interfaces of the source devices 2 and 3 that have completed wireless connection processing with the sink device 1, For example, the device IDs of the devices 2 and 3 that are MAC addresses and the physical addresses in the HDMI of the source devices 2 and 3 are stored in association with each other. The physical address assigned to each source device takes any value from “0.0.0.0” to “FFFF”, and the sink device 1 itself has a physical address “0. “0.0.0” is assigned in advance.

  5 and 6 are signal configuration diagrams showing examples of the formats of the EDID request signal and the EDID response signal, respectively. In FIG. 5, the format of the EDID request signal includes a destination device ID area 801, a transmission source device ID area 802, a sequence number area 803, and a type area 804. The destination device ID area 801 stores the device ID of the sink device 1 that is the destination device that transmits the EDID request signal. The transmission source device ID area 802 stores the device ID of the source device 2 or 3 that is the transmission source device that transmits the EDID request signal. The sequence number area 803 stores a sequence number according to an internal counter in the controller 20. The type field 804 stores a value indicating the type of the EDID request signal. In FIG. 6, the format of the EDID response signal includes a destination device ID area 901, a transmission source device ID area 902, a sequence number area 903, a type area 904, and an EDID information area 905. The destination device ID area 901 stores the device ID of the source device 2 or 3 that is the destination device that transmits the EDID response signal. The transmission source device ID area 902 stores the device ID of the sink device 1 that is the transmission source device that transmits the EDID response signal. The sequence number area 903 stores the same value as the value included in the sequence number area 803 of the EDID request signal in FIG. The type field 904 stores a value indicating the type of the EDID response signal. The EDID information area 905 stores the EDID information of the EDID table 12a read from the DRAM 12.

  7 and 8 are signal configuration diagrams showing examples of the formats of the connection completion notification signal and the connection completion response signal, respectively. In FIG. 7, the format of the connection completion notification signal has a destination device ID area 1001, a transmission source device ID area 1002, a sequence number area 1003, and a type area 1004. The destination device ID area 1001 stores the device ID of the sink device 1 that is the destination device that transmits the connection completion notification signal. The transmission source device ID area 1002 stores the device ID of the source device 2 or 3 that is the transmission source device that transmits the connection completion notification signal. The sequence number area 1003 stores a sequence number according to the internal counter. The type area 1004 stores a value indicating the type of the connection completion notification signal. In FIG. 8, the format of the connection completion response signal has a destination device ID area 1101, a transmission source device ID area 1102, a sequence number area 1103, and a type area 1104. The destination device ID area 1101 stores the device ID of the source device 2 or 3 that is the destination device that transmits the connection completion response signal. The transmission source device ID area 1102 stores the device ID of the sink device 1 that is the transmission source device that transmits the connection completion response signal. The sequence number area 1103 stores the same value as the value included in the sequence number area 1003 of the connection completion notification signal. The type field 1104 stores a value indicating the type of the connection completion response signal.

  FIG. 9 is a flowchart showing wireless connection processing by the controller 10 of the sink device 1 of FIG. In step S10 of FIG. 9, first, the EDID table 11a is read from the ROM 11 using the DDC and stored in the EDID table 12a of the DRAM 12. Next, in step 11, it is determined whether or not an authentication request signal has been received from the source device 2. If YES, the process proceeds to step S12. If NO, the process returns to step S11 and the process is repeated. In step 12, authentication processing is performed by determining whether or not the device ID of the source device 2 included in the authentication request signal is already stored in the node information table 12b. If YES, the process proceeds to step S14, while NO. In the case of, go to step S13. In step S13, a physical address is assigned to the device ID of the source device 2 included in the authentication request signal, and the device ID and the physical address are associated with each other and stored and registered in the node information table 12b. In step S14, an authentication completion signal is transmitted to the source device 2.

  In step S15, a physical address (for example, 1.0.0.0) in HDMI corresponding to the device ID of the source device 2 included in the authentication request signal is read from the node information table 12b, and the read physical address is stored in the EDID table. 12a is set in the physical address storage area of the EDID information in 12a. In step S16, it is determined whether or not an EDID request signal has been received from the source device 2. If YES, the process proceeds to step S17. If NO, the process returns to step S16 and the process is repeated. In step S17, the EDID table 12a is read from the DRAM 12, the EDID information included in the EDID table 12a is set in the EDID information area 905 of the EDID response signal, and the EDID response signal is transmitted to the source device 2. In step S18, it is determined whether or not a connection completion notification is received from the source device 2. If YES, the process proceeds to step S19. If NO, the process returns to step S18 to repeat the process. In step S19, a connection completion response signal is transmitted to the source device 2 and the process is terminated. The above-described wireless connection processing by the controller 10 of the sink device 1 is executed similarly for the source device 3.

  FIG. 10 is a flowchart showing a wireless connection process by the controller 20 of the source device 2. In step S20 in FIG. 10, first, an authentication request signal is broadcasted. In step 21, it is determined whether an authentication completion signal has been received from the sink device 1. If YES, the process proceeds to step S22. If NO, the process returns to step S21 to repeat the process. Next, an EDID request signal is transmitted to the sink device 1 in step S22. In step S23, it is determined whether or not an EDID response signal has been received from the sink device 1. If YES, the process proceeds to step S24. If NO, the process returns to step S23 and the process is repeated. Next, in step S24, the EDID information included in the received EDID response signal is stored in the virtual EDID table 21a of the ROM 21. In step S25, a connection completion notification signal is transmitted to the sink device 1. Next, in step S26, it is determined whether or not a connection completion response signal has been received from the sink device 1. If YES, the process proceeds to step S27. If NO, the process returns to step S26 and the process is repeated. In step S27, an HPD (Hot Plug Detect) signal is turned on and output, and the physical address assigned to the source device 2 by the sink device 1 is read from the virtual EDID table 21a of the DRAM 21 to be a physical address as the source device 2 itself. Then, the setting information of the display 13 of the sink device 1 in the EDID information is read and set from the virtual EDID table 21a, and the process is terminated. The source device 2 wirelessly transmits a video signal and an audio signal to the sink device 1 based on the set setting information. The above-described wireless connection processing by the controller 20 of the source device 2 is executed similarly for the source device 3.

  FIG. 11 is a sequence diagram showing signals transmitted and received between the sink device 1 and the source devices 2 and 3 in FIG. In FIG. 11, when the source device 2 is turned on in the power-on state of the sink device 1, the source device 2 first transmits an authentication request signal to the sink device 1. The sink device 1 transmits an authentication completion signal to the source device 2 after executing authentication processing in response to the authentication request signal. The source device 2 transmits an EDID request signal to the sink device 1 in response to the authentication completion signal. In response to the EDID request signal, the sink device 1 transmits an EDID response signal including EDID information. The source device 2 transmits a connection completion notification signal to the sink device 1 in response to the EDID response signal, and the sink device 1 transmits a connection completion response signal to the source device 2 in response to the connection completion notification signal. . After the above wireless connection processing is completed, a device designation signal for selecting the source device 2 as a communication partner is transmitted from the sink device 1, and the source device 2 transmits an ACK signal to the sink device 1 in response to the device designation signal. To do. Thereafter, AV data transmission processing between the sink device 1 and the source device 2 is started. Subsequently, when the power of the source device 3 is turned on, the sink device 1 transmits / receives each signal to / from the source device 3 in the same communication procedure. The sink device 1 transmits the EDID response signal including the EDID information in response to the EDID request signal, thereby reliably transmitting the EDID information and the physical address assigned to the source devices 2 and 3 to the source devices 2 and 3. Thus, communication between the sink device 1 and the source devices 2 and 3 can be established.

  As described above, according to the wireless transmission system according to the present embodiment, the EDID information including the setting information of the display 13 is wirelessly transmitted and received between the sink device 1 and the source device 2, so that the appearance is orderly without wiring. In addition, one sink device 1 can easily communicate with a plurality of source devices 2 and 3 and can read EDID information at a higher speed than the conventional one.

  In the present embodiment, the DRAM 21 of the source devices 2 and 3 stores the virtual EDID table 21a. However, the present invention is not limited to this, and the EDID request signal is received by the controller 20 every time when EDID information is required. 1 may be acquired to obtain EDID information.

  Also, the format of the node information table 12b shown in FIG. 4 and each control signal shown in FIGS. 5 to 8 is merely an example, and formats having other configurations may be used.

  Further, in the sink device 1, when the controller 10 reads the EDID table 11a from the ROM 11, some setting information necessary for wireless communication is selected and read out from the setting information of the EDID information and stored in the EDID table 12a. Good. Alternatively, of the EDID information, only a video format that can be transmitted at a wireless data transmission rate that can be displayed on the display 13 and can be received by the wireless transmission / reception circuit 15 may be transmitted. Specifically, for example, as shown in FIG. 14, for example, when the wireless data transmission rate is 3 Gbps or less, the video format information corresponding to the resolution 1080p among the total video format information of the setting information included in the EDID information is displayed. When the wireless data transmission rate is 1.5 Gbps or less, the video format information corresponding to the resolution 1080p, 1080i is deleted from all the video format information, and when the wireless data transmission rate is 1.3 Gbps or less, When the video format information corresponding to the resolution 1080p, 1080i, 720p is deleted from the video format information and the wireless data transmission speed is 0.5 Gbps or less, the resolution 1080p, 1080i, 720p, 480p is supported among all the video format information. Video format information The may be wirelessly transmitted to the source device 2 to remove.

  Furthermore, the EDID information of the sink device 1 is inserted into the EDID response signal and transmitted wirelessly. However, the present invention is not limited to this configuration, and a beacon periodically transmitted from the sink device 1 instead of the EDID response signal. It may be inserted into a signal or the like and transmitted wirelessly.

  In FIG. 11, the wireless connection process is executed at the power-on timing of the source device 2. However, the present invention is not limited to this, and when the display 13 of the sink device 1 is turned on, the sink device 1 and the source device 2, or the like. It may be executed at other timing, such as at the time of connection 3.

Second embodiment.
FIG. 12 is a block diagram showing configurations of the sink device 1A and the sink device adapter device 35 of the wireless communication system according to the second embodiment of the present invention. FIG. 13 is a block diagram illustrating the configuration of the source device 2A and the source device adapter device 45 of the wireless communication system according to the present embodiment. 12 and 13, the wireless communication system according to the present embodiment includes a sink device 1A, a source device 2A, a sink device adapter device 35, and a source device adapter device 45. The sink device 1A shown in FIG. 12 includes the controller 10A and the wired transmission / reception circuit 33 in place of the controller 10, the DRAM 12, the wireless transmission / reception circuit 15 and the antenna 16 of FIG. This is different from the sink device 1 according to the wireless communication system according to the embodiment. Further, the source device 2B shown in FIG. 13 includes the controller 20A and the wired transmission / reception circuit 43 in place of the controller 20, the DRAM 21, the wireless transmission / reception circuit 25, and the antenna 26 of FIG. This is different from the source device 2 according to the wireless communication system according to the embodiment. About other points, it is the same as that of the radio | wireless communications system which concerns on 1st Embodiment, The detailed description about the component which attached | subjected the same code | symbol is abbreviate | omitted.

  In FIG. 12, the wired transmission / reception circuit 33 of the sink device 1A receives an AV signal from the adapter device 35 for the sink device via the cable C1, outputs it to the audio signal and video signal processing circuit 9, and also via the cable C1. The data signal is received from the adapter device 35 for the sink device, and is output to the controller 10A. The controller 10A reads the EDID table 11a from the ROM 11, and transmits it to the sink device adapter device 35 via the wired transmission / reception circuit 33 and the cable C1.

  The sink device adapter device 35 includes a controller 30, a wired transmission / reception circuit 31, a wireless transmission / reception circuit 32, a DRAM 34, and an antenna 36. The wired transmission / reception circuit 31 transmits the AV signal received from the source device 2A via the antenna 36 and the wireless transmission / reception circuit 32 to the sink device 1A via the cable C1, and from the sink device 1A via the cable C1. The EDID table 11 a is received and output to the controller 30. The DRAM 34 stores an EDID table 34a and a node information table 34b having the same configuration as the node information table 12b shown in FIG. The EDID table 34 a in the DRAM 34 includes the contents of the EDID table 11 a in the ROM 11. The wireless transmission / reception circuit 32 and the antenna 36 are configured similarly to the wireless transmission / reception circuit 15 and the antenna 16 of the sink device 1 of the wireless communication system according to the first embodiment.

  The controller 30 generates a data signal including a control signal for setting the physical address of the source device 2A in the adapter device 35 for the sink device, outputs the data signal to the wireless transmission / reception circuit 32, and passes through the antenna 36 and the wireless transmission / reception circuit 32. The wireless connection process is executed based on the data signal received from the source device 2A.

  In FIG. 13, the wired transmission / reception circuit 43 of the source device 2A transmits the video signal and the audio signal read by the DVD player to the source device adapter device 45 via the cable C2, while the source device adapter device 45. The control information received via the cable C2 is output to the controller 20A. The controller 20 </ b> A controls the DVD player 22 based on the control information output from the wired transmission / reception circuit 43.

  The source device adapter device 45 includes a controller 40, a wired transmission / reception circuit 41, a wireless transmission / reception circuit 42, a DRAM 44, and an antenna 46. The wired transmission / reception circuit 41 transmits the AV signal received from the source device 2A via the cable C2 to the sink device 1A via the antenna 46 and the wireless transmission / reception circuit 42, and sinks via the wireless transmission / reception circuit 42 and the antenna 46. The data signal received from the device adapter device 35 is transmitted to the sink device adapter device 35 via the cable C2. The DRAM 44 stores a virtual EDID table 44a. The wireless transmission / reception circuit 42 and the antenna 46 are configured similarly to the wireless transmission / reception circuit 25 and the antenna 26 of the source device 2 of the wireless communication system according to the first embodiment.

  The controller 40 generates a data signal including a control signal for setting the physical address of the source device 2A in the adapter device 35 for the sink device, outputs the data signal to the wireless transmission / reception circuit 42, and passes the antenna 46 and the wireless transmission / reception circuit 42. The wireless connection processing is executed based on the data signal received from the adapter device 35 for the sink device.

  As described above, according to the wireless communication system according to the second embodiment, the sink device 1A or the source device 2A having only the wired interface is equipped with the sink device adapter device 35 in the sink device 1A. By mounting the source device adapter device 45 on the source device 2A, the EDID information of the sink device 1A can be read wirelessly, and the physical address of the source device 2A can be set via a wireless line. .

  In the first and second embodiments, DRAMs 12, 21, 34, and 44 are used. However, the present invention is not limited to this configuration, and a higher-speed memory device such as an SRAM may be used instead of the DRAM.

  According to the sink device, the source device, the adapter device for the sink device, the adapter device for the source device, the wireless communication system, and the control method thereof according to the present invention, the setting information of the display means is wirelessly transmitted and received between the sink device and the source device. In addition, the appearance can be made orderly by eliminating the wiring, and one sink device can easily communicate with a plurality of source devices, and the setting information of the display means can be read faster than in the past.

  The sink device, the source device, the adapter device for the sink device, the adapter device for the source device, the wireless communication system, and the control method thereof according to the present invention can be used for AV systems such as a DVD player and a television receiver, for example. .

1 is a block diagram illustrating a configuration of a wireless communication system according to a first embodiment of the present invention. It is a block diagram which shows the detailed structure of the sink device 1 of FIG. FIG. 2 is a block diagram illustrating a detailed configuration of source devices 2 and 3 in FIG. 1. It is a table which shows an example of the node information table 12b of FIG. FIG. 3 is a signal configuration diagram showing an example of a format of an EDID request signal wirelessly transmitted from source devices 2 and 3 to a sink device 1 in the wireless communication system of FIG. 1. FIG. 3 is a signal configuration diagram showing an example of a format of an EDID response signal wirelessly transmitted from the sink device 1 to the source devices 2 and 3 in the wireless communication system of FIG. 1. FIG. 3 is a signal configuration diagram illustrating an example of a format of a connection completion notification signal that is wirelessly transmitted from the source devices 2 and 3 to the sink device 1 in the wireless communication system of FIG. 1. FIG. 3 is a signal configuration diagram illustrating an example of a format of a connection completion response signal that is wirelessly transmitted from the sink device 1 to the source devices 2 and 3 in the wireless communication system of FIG. 1. 3 is a flowchart showing wireless connection processing by a controller 10 of the sink device 1 of FIG. 1. 3 is a flowchart showing wireless connection processing by a controller 20 of the source devices 2 and 3 in FIG. 1. FIG. 3 is a sequence diagram illustrating signals transmitted and received between the sink device 1 and the source devices 2 and 3 in FIG. 1. It is a block diagram which shows the structure of the sink device 1A and the adapter device 1B for sink devices of the radio | wireless communications system which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the source device 2A and the adapter device 2B for source devices of the radio | wireless communications system which concerns on the 2nd Embodiment of this invention. It is a table which shows the video format deleted for every radio | wireless data transmission rate in the radio | wireless communications system which concerns on the modification of the 1st Embodiment of this invention.

Explanation of symbols

1, 1A ... source device,
2, 2A, 3 ... sink device,
9: Audio signal and video signal processing circuit,
10, 20, 10A, 20A, 30, 40 ... controller,
11 ... ROM,
12, 21, 34, 44 ... DRAM,
13 ... Display,
14 ... Speaker,
15, 25, 32, 42 ... wireless transmission / reception circuit,
16, 26, 36, 46 ... antenna,
22 ... DVD player,
31, 33, 41, 43 ... wired transmission / reception circuits,
35 ... Adapter device for sink device,
45 ... Adapter device for source device.

Claims (14)

In a sink device for a wireless communication system, comprising: a source device that wirelessly transmits a video signal; and a sink device that receives the wirelessly transmitted video signal and displays the received video signal on a display unit;
First storage means for storing setting information of the display means;
While the radio receiving a predetermined first radio data signal from the source device, and a wireless transmission receiving means wirelessly transmits a predetermined second radio data signal to the source device,
Reading said setting information from said first storage means, and control means for controlling the radio transmission reception unit to wirelessly transmit the second wireless data signal including the read setting information,
Before SL control means, said when the first radio data signal received wirelessly, the wireless device identification information of the source device contained in the first wireless data signals from the source device from the previous SL source device, the source The physical address corresponding to the wireless device identification information included in the first wireless data signal received wirelessly is read from the node information table from the node information table that stores the physical address assigned to the device in association with the physical address. , sink device and controls the physical address the read, the wireless transmission receiving means to wirelessly transmit the second radio data signal to the source device including said read setting information. A second storage means for storing the node information table;
The control means reads the setting information from the first storage means and stores it in the second storage means, reads the setting information from the second storage means, and reads the read physical address, 2. The sink device according to claim 1, wherein the wireless transmission / reception unit is controlled to wirelessly transmit the second wireless data signal including setting information read from two storage units to the source device. 3. The sink device according to claim 2 , wherein the reading speed of the second storage means is faster than the reading speed of the first storage means. The control means selects and stores at least a part of the setting information when the setting information is read from the first storage means and stored in the second storage means. The sink device according to 2 or 3 .   5. The sink device according to claim 4, wherein at least a part of the setting information is setting information that can be transmitted at a wireless transmission rate that can be received by the sink device. 6. The device according to claim 1, wherein the second wireless data signal further includes wireless device identification information of a source device included in the first wireless data signal from the source device. The sink device described in 1. A wireless communication system comprising: a source device that wirelessly transmits a video signal; and the sink device according to any one of claims 1 to 6.
The source device includes wireless transmission / reception means for wirelessly receiving a second wireless data signal including the setting information wirelessly transmitted from the sink device and wirelessly transmitting a video signal to the sink device based on the setting information. A wireless communication system characterized by the above. In a control method of a wireless communication system comprising: a source device that wirelessly transmits a video signal; and a sink device that receives the wirelessly transmitted video signal and displays the received video signal on a display unit;
The sink device includes a to that Symbol憶手stage storing setting information of the display unit;
Before SL sink apparatus reads out the setting information from the storage means, when the first radio data signal from the previous SL source device wirelessly received, the source device included in the first wireless data signals from the source device From the node information table that stores the wireless device identification information and the physical address assigned to the source device in association with each other, the physical corresponding to the wireless device identification information included in the first wireless data signal received wirelessly reads the address from the node information table, and the physical address the reading, comprising the steps of: wirelessly transmitting a second wireless data signal including said read setting information to the source device,
The source device wirelessly receiving a second wireless data signal including the setting information wirelessly transmitted from the sink device, and wirelessly transmitting a video signal to the sink device based on the setting information. A control method for a wireless communication system. The method of controlling a wireless communication system according to claim 8, wherein the second wireless data signal further includes wireless device identification information of the source device included in the first wireless data signal from the source device. An adapter device for a source device that wirelessly transmits a video signal; and an adapter device for a sink device that receives the wirelessly transmitted video signal and outputs the received video signal to display means of the sink device for display. An adapter device for a sink device for a wireless communication system,
While the radio receiving a predetermined first radio data signal from the adapter device for the source device, and a wireless transmission receiving means wirelessly transmits a predetermined second radio data signal to the adapter device for the source device,
Storage means for storing setting information read from the sink device;
It reads the setting information from the storage means, and control means for controlling the radio transmission reception unit to wirelessly transmit the second wireless data signal including the read setting information to the adapter device for the source device Prepared,
The storage means further stores a node information table that stores the wireless device identification information of the source device included in the first wireless data signal from the adapter device for the source device and the physical address assigned to the source device in association with each other. Store
The control means, when wirelessly receiving the first wireless data signal from the source device adapter device, the physical address corresponding to the wireless device identification information included in the wirelessly received first wireless data signal In order to wirelessly transmit the second wireless data signal including the read physical address and the setting information read from the storage unit to the adapter device for the source device. sink device adapter apparatus characterized by controlling the radio transmission receiving means. 11. The sink device adapter device according to claim 10, wherein the second wireless data signal further includes wireless device identification information included in the first wireless data signal from the source device adapter device. A wireless communication system comprising: an adapter device for a source device that wirelessly transmits a video signal; and an adapter device for a sink device according to claim 10 or 11 ,
The adapter device for the source device wirelessly receives the second wireless data signal including the setting information wirelessly transmitted from the adapter device for the sink device, and converts the video signal based on the setting information to the adapter device for the sink device. A wireless communication system comprising wireless transmission / reception means for wireless transmission. An adapter device for a source device that wirelessly transmits a video signal; and an adapter device for a sink device that receives the wirelessly transmitted video signal and outputs the received video signal to display means of the sink device for display. A control method for a wireless communication system, comprising:
The adapter device for the sink device includes storage means for storing setting information read from the sink device,
The storage means further stores a node information table that stores the wireless device identification information of the source device included in the first wireless data signal from the adapter device for the source device and the physical address assigned to the source device in association with each other. Storage means for storing
The adapter device for the sink device stores the setting information read from the sink device in a storage unit;
When the adapter device for the sink device reads the setting information from the storage unit and wirelessly receives the first wireless data signal from the adapter device for the source device, the adapter device for the sink device is included in the first wireless data signal received wirelessly The physical address corresponding to the wireless device identification information is read from the node information table, and a second wireless data signal including the read physical address and the setting information read from the storage unit is read from the source Wirelessly transmitting to a device adapter device;
The adapter device for the source device wirelessly receives the second wireless data signal including the setting information wirelessly transmitted from the adapter device for the sink device, and converts the video signal based on the setting information to the adapter device for the sink device. Wirelessly communicating with the wireless communication system. 14. The method of controlling a wireless communication system according to claim 13, wherein the second wireless data signal further includes wireless device identification information included in the first wireless data signal from the source device adapter device.

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