WO2010064499A1 - 無線伝送システム - Google Patents
無線伝送システム Download PDFInfo
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- WO2010064499A1 WO2010064499A1 PCT/JP2009/068102 JP2009068102W WO2010064499A1 WO 2010064499 A1 WO2010064499 A1 WO 2010064499A1 JP 2009068102 W JP2009068102 W JP 2009068102W WO 2010064499 A1 WO2010064499 A1 WO 2010064499A1
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- wireless
- transmission
- wireless communication
- hdmi
- data
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- GJWAPAVRQYYSTK-UHFFFAOYSA-N [(dimethyl-$l^{3}-silanyl)amino]-dimethylsilicon Chemical compound C[Si](C)N[Si](C)C GJWAPAVRQYYSTK-UHFFFAOYSA-N 0.000 claims description 12
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Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2381—Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
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- H—ELECTRICITY
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2404—Monitoring of server processing errors or hardware failure
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
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- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/631—Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
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- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/633—Control signals issued by server directed to the network components or client
- H04N21/6338—Control signals issued by server directed to the network components or client directed to network
Definitions
- the present invention relates to a wireless transmission system, and more particularly to a wireless transmission system for wirelessly connecting devices compatible with the HDMI standard or the like.
- HDMI standard products are widely used as digital interfaces for video / audio transmission.
- the HDMI standard has been arranged for AV (Audio Visual) devices by adding an audio transmission function and copyright protection function to the DVI (Digital Visual Interface) standard, which is a digital connection standard between the computer and the display. Yes.
- video (video) data and audio data are transmitted by a method called TMDS (Transition (Minimized Differential Signaling).
- This CEC protocol is a control protocol for performing control between devices connected by an HDMI cable.
- various controls can be performed based on a specific physical address and logical address assigned to each device existing on the HDMI network. For example, when a user plays a digital broadcast on a television device and plays a DVD (Digital Versatile Disc) player connected via HDMI, the television device itself automatically inputs the terminal to which the DVD player is connected. Switch to. Further, menu operations displayed on the DVD player, power ON / OFF, and the like can be operated from the remote control of the television apparatus.
- Non-Patent Document 1 Terms related to CEC are defined in Non-Patent Document 1, and those having an HDMI input terminal are defined as sink devices, and those having an HDMI output terminal and outputting an AV stream are defined as source devices.
- sink devices A device that has an HDMI input terminal and an output terminal, inputs and outputs an AV stream, and behaves as both a sink device and a source device is defined as a repeater device.
- Display devices are the main sink devices.
- Examples of source devices are STB (Set Top Box), various players such as DVD and BD (Blu-ray Disc), and various recorders such as DVD and BD.
- An example of a repeater device is an AV amplifier.
- the HDMI device is configured to transmit an AV stream and accompanying data accompanying the AV stream via a single HDMI cable (see, for example, Patent Document 1).
- the accompanying data includes, for example, a CEC message used for inter-device control, an authentication message used for HDCP (High-bandwidth Digital Content Protection) authentication, and the like. Exchanged.
- video / audio and accompanying data accompanying it between devices compliant with the HDMI standard.
- video / audio and associated data are wirelessly transmitted using limited resources (including a CPU and a transmission band) of the wireless transceiver.
- the band is limited, and errors are often included due to wireless characteristics.
- bandwidth is preferentially allocated to video / audio, only a narrow bandwidth is allocated to accompanying data such as format information and control information accompanying video / audio, resulting in a high probability of transmission errors.
- the present invention has been made in view of the above circumstances, and in a wireless transmission environment in which a transmission band is narrow and a transmission error is likely to occur, a transmission method in which incidental data accompanying video / audio is different depending on its characteristics. It is an object of the present invention to provide a wireless transmission system that can be used for transmission.
- the first technical means includes a first wireless communication device connected to a display device, and a second wireless communication device connected to a video output device, and the first wireless communication device.
- Wireless transmission system that outputs video and audio from the video output device to the display device by performing wireless communication between the first wireless communication device and / or the second wireless communication device.
- the second wireless communication device is characterized in that accompanying data accompanying video and audio is classified according to its characteristics, and the accompanying data is wirelessly transmitted by a different transmission method for each classification.
- the first wireless communication device and / or the second wireless communication device includes a buffer for each classification of accompanying data. .
- the third technical means is characterized in that, in the first or second technical means, the transmission method is different in presence / absence of retransmission and rearrangement of transmission order.
- a fourth technical means is the first technical means according to any one of the first to third technical means, wherein the first wireless communication device and / or the second wireless communication device has a plurality of wired transmission lines in accordance with characteristics of accompanying data. And the incidental data is classified for each wired transmission line.
- the first wireless communication device and / or the second wireless communication device transmits a plurality of accompanying data having different characteristics on one wired transmission line.
- the plurality of accompanying data is classified based on the header information.
- a sixth technical means is the fourth or fifth technical means, wherein the display device and the first wireless communication device are HDMI-connected, and the video output device and the second wireless communication device are HDMI-connected,
- the plurality of wired transmission lines are composed of TMDS lines, CEC lines, DDC lines, and HPD lines in the HDMI standard, and the accompanying data is DIP transmitted on the TMDS lines, CEC messages transmitted on the CEC lines,
- the message includes an HDCP authentication message transmitted on the DDC line and a hot plug signal transmitted on the HPD line, and the classification includes the first type including the DIP, the CEC message, and the HDCP authentication message. Dividing into a second type and a third type including the hot plug signal It is obtained by the features.
- the second wireless communication device uses the DIP to change the image quality or audio adjustment data that changes during video and audio viewing to the first type.
- the data which is classified and changes when the video output source is switched is classified into the third type.
- the first type of transmission system is a system that does not perform retransmission and rearrangement of the transmission order
- the second type of transmission system Is a method of performing retransmission and not rearranging the transmission order.
- the third type of transmission method performs retransmission and rearrangement of the transmission order, and the old associated data before the state change remains in the buffer. This is a method for updating the.
- accompanying data associated with video / audio can be transmitted using different transmission schemes according to the characteristics, thereby reducing the amount of data to be transmitted. be able to. Further, even if transmission errors or missing data occur in the accompanying data, the accompanying data can be transmitted correctly. Further, it is possible to preferentially transmit accompanying data that needs to be sent quickly.
- an HDMI device will be described as an example.
- the present invention is applicable to a wireless device capable of transmitting video / audio and accompanying data accompanying the video / audio wirelessly.
- FIG. 1 is a block diagram showing a configuration example of a wireless transmission system according to an embodiment of the present invention.
- 1 is a source device corresponding to a video output device
- 2 is a wireless transmitter corresponding to a second wireless communication device
- 3 is a wireless receiver corresponding to a first wireless communication device
- 4 is a sink corresponding to a display device.
- the wireless transmitter 2 and the wireless receiver 3 are connected via wireless, and the wireless transmitter 2 and the wireless receiver 3 constitute one repeater device.
- This wireless transmission system includes a wireless receiver 3 that is HDMI-connected to the sink device 4, and a wireless transmitter 2 that is HDMI-connected to the source device 1, and is wireless between the wireless transmitter 2 and the wireless receiver 3. It is configured to output video and audio from the source device 1 to the sink device 4 by performing communication.
- first wireless communication device and the second wireless communication device in the present invention are devices capable of wireless transmission / reception, but for convenience of explanation, the first wireless communication device is the wireless receiver 3 and the second wireless communication device is the wireless transmitter. It shall be called 2.
- the source device 1 may be any device that can output video and audio, and may be, for example, a tuner device such as an STB, various recorders such as BD and DVD, a player, a game device, or the like.
- the source device 1 includes components for realizing a function as a video output device, but a description thereof is omitted here.
- the source device 1 includes an HDMI output unit 11 and is HDMI-connected to the wireless transmitter 2.
- the HDMI output unit 11 is an HDMI I / F for connecting an HDMI cable.
- the HDMI cable includes a CEC line that is a bidirectional bus for transmitting a common control signal (CEC message) between devices.
- the HDMI cable is used for TMDS lines for transmitting video and audio signal streams that are digital signals in a differential manner, EDID (Extended Display Identification Data) transmission, and HDCP authentication.
- EDID Extended Display Identification Data
- HDCP authentication high-Plug Detect
- This EDID includes information on the types of signals that can be processed by the display device, information on the resolution of the display panel, information on the pixel clock, horizontal effective period, vertical effective period, and the like.
- the EDID is acquired from the video display side (sink device 4) by the video transmission side (source device 1), and the video transmission side outputs a video signal that matches the resolution of the display panel used (in this example, the display panel of the sink device 4).
- the EDID of the sink device 4 may be copied and stored in the wireless transmitter 2.
- the source device 1 can access the wireless transmitter 2 and acquire the EDID of the sink device 4. .
- the wireless transmitter 2 includes a control unit 21, a wireless communication unit 22, and an HDMI input unit 23.
- the HDMI input unit 23 is an HDMI I / F for connecting the above-described HDMI cable and HDMI connection with the source device 1, and is connected to the HDMI output unit 11 of the source device 1 via the HDMI cable.
- the source device 1 and the wireless transmitter 2 can transmit and receive various messages such as a CEC message and an authentication message.
- the control unit 21 includes a first buffer 211, a second buffer 212, a third buffer 213, an HDMI communication processing unit 214, and an HDMI control unit 215.
- the HDMI control unit 215 is connected to the HDMI input unit 23 via an AV (video / audio) line and a message line.
- the HDMI communication processing unit 214 is connected to the wireless communication unit 22 via an AV line and a message line.
- TMDS line, CEC line, DDC line, HPD line, etc. in HDMI
- the audio / video data transmission line is an AV line
- other accompanying data (message, control information, etc.) transmission line is a message line. It is said.
- the wireless communication unit 22 converts the video, audio, and message acquired from the HDMI communication processing unit 214 into a format that can be wirelessly transmitted, and wirelessly transmits the converted video, audio, and message to the wireless receiver 3.
- the sink device 4 may be any device that can display video and output audio, and may be, for example, a monitor or a TV device with a tuner.
- the sink device 4 includes components for realizing a function as a display device, but a description thereof is omitted here.
- the sink device 4 includes an HDMI input unit 41 and is HDMI-connected to the wireless receiver 3.
- the HDMI input unit 41 is an HDMI I / F for connecting an HDMI cable.
- the HDMI input unit 41 connects each line (CEC line, TMDS line, DDC line, HPD line) included in the HDMI cable, similarly to the source device 1 described above.
- the wireless receiver 3 includes a control unit 31, a wireless communication unit 32, and an HDMI output unit 33.
- the HDMI output unit 33 is an HDMI I / F for connecting the above-described HDMI cable to connect the sink device 4 to the HDMI, and is connected to the HDMI input unit 41 of the sink device 4 via the HDMI cable.
- the sink device 4 and the wireless receiver 3 can transmit and receive various messages such as a CEC message and an authentication message.
- the control unit 31 includes a first buffer 311, a second buffer 312, a third buffer 313, an HDMI communication processing unit 314, and an HDMI control unit 315.
- the HDMI control unit 315 is connected to the HDMI output unit 33 via an AV (video / audio) line and a message line.
- the HDMI communication processing unit 314 is connected to the wireless communication unit 32 via an AV line and a message line.
- the main feature of the present invention is that, in a wireless transmission environment in which a transmission band is narrow and transmission errors are likely to occur, incidental data associated with video / audio is transmitted by different transmission methods according to the characteristics.
- the control unit 21 included in the wireless transmitter 2 and the control unit 31 included in the wireless receiver 3 classify accompanying data associated with video and audio according to their characteristics, and different transmission methods for each classification To control the accompanying data to be wirelessly transmitted.
- the control unit 21 and the control unit 31 include a buffer (in this example, the first buffer to the third buffer, respectively) for each classification of the accompanying data. The presence / absence of sorting is different.
- FIG. 2 is a diagram showing an example of a table describing the classification of accompanying data and the transmission method for each classification.
- This table is stored in a memory (not shown) provided in the control unit 21 and the control unit 31, and is referred to by the HDMI control unit 215 and the HDMI control unit 315 as appropriate.
- the accompanying data is classified into three types according to the characteristics. In Type 1, data that may have a low transmission reliability is classified as important, and the transmission method is “retransmission: none” and “transmission order rearrangement: none”. Type 2 is classified as data whose transmission speed is unimportant, but whose transmission reliability is required to be high (transmission is ensured in order), and the transmission methods are “retransmission: present”, “transmission”. Sort order: None ”.
- transmission speed is not important, and it is necessary to increase the reliability of transmission.
- the same kind of old data remaining in the queue (buffer) is required.
- the data that can be discarded is classified, and the transmission method is “retransmission: yes”, “transmission order rearrangement: yes (old information before state change remaining in the queue (FIFO) is discarded)”.
- accompanying data that changes during viewing of video and audio is classified as type 1
- incidental data related to commands and authentication procedures is classified as type 2, and others.
- the accompanying data that changes when the video source is switched, such as when the source device is switched, is classified as type 3.
- Type 1 data that places importance on transmission speed is classified.
- Data classified as type 1 is periodically transmitted from the transmission side regardless of whether there is a change, and does not return an acknowledgment (ACK) from the reception side.
- the receiving side performs necessary processing if the state has changed based on the received data after receiving the data.
- the amount of data that can be transmitted is limited, but data with a high update frequency is classified at a constant data rate.
- audio / audio This corresponds to status information that changes in synchronization with video and audio such as video mute control information.
- Type 2 does not place importance on transmission speed, but classifies data that needs to be transmitted.
- the transmission side stores the data in a queue (FIFO), transmits the data in order when transmission is possible, and retransmits subsequent data if no reception confirmation (ACK) is returned from the reception side. After receiving the data, the receiving side returns ACK to the transmitting side and performs processing according to the received data.
- This type 2 is classified into data that does not allow a change of order and data omission, for example, CEC message (CEC), HDCP authentication message, EDID (DDC), between a wireless transmitter and a wireless receiver. Includes wireless communication control information. However, since EDID basically does not change with device information, it may be classified into type 3.
- Type 3 does not place importance on transmission speed, but classifies data that is indispensable only for status notification. Similar to type 2, the transmission side stores data in a queue (FIFO), transmits the data in order when transmission is possible, and retransmits subsequent data if no reception confirmation (ACK) is returned from the reception side. The difference from Type 2 is that if the same type of data is already in the queue, the transmitting side replaces the old data with the new data and discards the old data. After receiving the data, the receiving side returns ACK to the transmitting side and performs processing according to the received data.
- FIFO queue
- ACK reception confirmation
- Type 3 includes, for example, video / audio format information, dimming information, color correction information (DIP), hot plug signal (HPD), and the like.
- DIP is information that is transmitted periodically regardless of whether there is a change in HDMI, as in Type 1, but the state is maintained on the transmitting side and the receiving side, and transmission is performed using Type 3 only at the change point.
- the amount of communication in the wireless section can be reduced.
- a CEC message that is various control commands for example, a remote control signal, a power on / off signal, an input switching signal, etc.
- a CEC message that transmits device-specific information For example, in the wireless method, information such as reception intensity is transmitted. These are classified as type 2 because they need to be transmitted in order reliably.
- various parameters such as wireless communication control information, the state of the transmitter and the receiver, and the received power and quality are exchanged for wireless control. These pieces of information are classified as type 2 because if they are not transmitted in order, there is a shift in wireless communication between the transmitter and the receiver.
- video / audio and DIP are transmitted on the TMDS line. Audio and DIP are transmitted during the video blanking period.
- the DIP mainly transmits data accompanying video / audio such as resolution information and content protection information, can also transmit vendor-defined frames, and can transmit average luminance information, audio parameters, and the like. If the DIP is set in the register on the transmission side at the implementation level, it is transmitted for each frame, and can be read if the DIP comes on the reception side.
- DIP can be broadly classified into two types (types 1 and 3) due to data characteristics.
- backlight control information (brightness information or control value for controlling the backlight), image quality adjustment processing information (OSD display status, etc.), audio / video mute control information, volume information, HDMI audio enable / disable Information (information for preventing abnormal noise from being generated in an invalid section) and the like are classified into type 1 because transmission is delayed and affects viewing.
- the product ID and VendorInfoFrame (information that does not change depending on the manufacturer) do not change after connection in the device information, and therefore are classified into type 3 and are classified as type 3 valid / invalid information, video adjustment related information, Resolution-related information, audio content protection information, color space information, and the like are also classified as type 3 because they change at the timing of switching video sources and are not constantly changing information.
- HDMI audio valid / invalid information and video signal valid / invalid information are information indicating the valid / invalid state of video and audio output from the transmission side. In other words, when receiving an invalid signal from the transmitting side on the receiving side, it is information for ignoring this. Occurrence is avoided.
- EDID and HDCP authentication messages are transmitted on the DDC line.
- EDID is device information related to specifications such as format information that can be displayed on a display device, and needs to be transmitted reliably, but does not change after being connected, so it is classified as type 2 or type 3.
- the HDCP authentication message is used for exchanging key information by an authentication sequence based on a protocol with a predetermined procedure, and is classified as type 2 because it needs to be transmitted in order reliably.
- a hot plug signal is transmitted on the HPD line.
- the hot plug signal is used to notify that a device has been detected, and is classified as type 3 because the latest state only needs to be transmitted reliably.
- the wireless transmitter 2 and the wireless receiver 3 include a plurality of wired transmission lines (CEC line, TMDS line, DDC line, and HPD line) according to the characteristics of the accompanying data.
- the accompanying data can be classified for each wired transmission line.
- the accompanying data can be classified based on the header information.
- the accompanying data includes a DIP transmitted on the TMDS line, a CEC message transmitted on the CEC line, an EDID and HDCP authentication message transmitted on the DDC line, and a hot plug signal transmitted on the HPD line. Is classified into type 1 (first type) including CEC message, EDID and type 2 (second type) including HDCP authentication message, and type 3 (third type) including hot plug signal. Is done. Further, among the DIPs, image quality or audio adjustment data that changes during video and audio viewing is classified as type 1, and data that changes when the video output source is switched is classified as type 3. Note that EDID may be classified into type 3.
- the HDMI control unit 215 classifies the associated data input from the HDMI input unit 23 based on the transmission line, header information, and the table shown in FIG.
- the associated data classified as 1 is stored in the first buffer 211
- the associated data classified as type 2 is stored in the second buffer 212
- the associated data classified as type 3 is stored in the third buffer 213.
- the HDMI communication processing unit 214 may add type identification information for identifying the type to the header or the like of the accompanying data when the accompanying data stored in each buffer is wirelessly transmitted to the wireless receiver 3.
- the wireless receiver 3 receives the accompanying data from the wireless transmitter 2, the wireless receiver 3 stores the accompanying data of type 1 in the first buffer 311 based on the type identification information given to the header.
- the receiving side can also share the type 2 and type 3 reception buffers.
- the wireless transmitter 2 performs transmission processing with a protocol according to the type
- the wireless receiver 3 performs reception processing with a protocol according to the type.
- the accompanying data is wirelessly transmitted from the wireless transmitter 2 to the wireless receiver 3
- EDID is data wirelessly transmitted from the wireless receiver 3 to the wireless transmitter 2.
- the CEC message is exchanged between the wireless receiver 3 and the wireless transmitter 2.
- the same processing can be performed when the associated data is wirelessly transmitted from the wireless receiver 3 to the wireless transmitter 2.
- the same classification can be performed for communication of control information between wireless devices as well as the associated HDMI accompanying data.
- FIG. 3 is a diagram for explaining an example of a wireless AV transmission method by the wireless transmission system according to the present invention.
- a sequence example when wirelessly transmitting accompanying data of type 1 (hereinafter referred to as a message) based on the system configuration of FIG. 1 will be described.
- “A, B, C, D” is stored in the first buffer 211 as a type 1 message.
- the HDMI communication processing unit 214 reads the message “A, B, C, D” from the first buffer 211, and the wireless communication unit 22 periodically and repeatedly transmits this message to the wireless receiver 3. .
- the message received from the transmitting side is compared with the type 1 message stored in the first buffer 311. If there is no change, the message in the first buffer 311 is held as it is.
- the HDMI control unit 215 when the HDMI control unit 215 receives a message classified as type 1 from the source device 1 (S 1), the message “A, B, C, The corresponding message of the same type is identified in “D” and rewritten (S2). Here, it is assumed that data “C” is rewritten to data “E”. Then, the HDMI communication processing unit 214 reads the message “A, B, E, D” from the first buffer 211 (S3), and the wireless communication unit 22 periodically sends this message to the wireless receiver 3. Repeatedly wireless transmission.
- the HDMI communication processing unit 314 receives the message “A, B, E, D” transmitted from the wireless transmitter 2 via the wireless communication unit 32 (S 4), and the HDMI communication processing unit 314 compares the message received from the wireless transmitter 2 with the message stored in the first buffer 311 and updates it if there is a change (S5).
- the message stored in the first buffer 311 is “A, B, C, D”, and the message is Since it has been changed, the content of the first buffer 311 is updated.
- the HDMI control unit 315 transmits the message “A, B, E, D” updated / saved in the first buffer 311 to the sink device 4 via the HDMI output unit 33 (S6).
- both buffers can be synchronized.
- FIG. 4 is a diagram for explaining another example of the wireless AV transmission method by the wireless transmission system according to the present invention.
- a sequence example when a type 2 message is wirelessly transmitted based on the system configuration of FIG. 1 will be described.
- the first to third buffers included in the wireless transmitter 2 and the wireless receiver 3 are assumed to be FIFO buffers.
- the HDMI control unit 215 receives the messages A and B classified as type 2 from the source device 1 in order (S11)
- the HDMI buffer 215 receives the second buffer in the order in which the messages A and B are received. It adds to 212 (S12).
- the HDMI communication processing unit 214 reads the message A previously received from the second buffer 212 (S13), and the wireless communication unit 22 wirelessly transmits the message A to the wireless receiver 3.
- the HDMI communication processing unit 314 receives the message A transmitted from the wireless transmitter 2 via the wireless communication unit 32 (S 14), and the HDMI communication processing unit 314 receives the message A from the wireless transmitter 2.
- the received message A is stored in the second buffer 312 and “ACK” for the message A is wirelessly transmitted to the wireless transmitter 2.
- the HDMI control unit 315 transmits the message A stored in the second buffer 312 to the sink device 4 via the HDMI output unit 33 (S15).
- the HDMI communication processing unit 214 determines that the transmission of the message A is completed, and stores it in the second buffer 212.
- the stored message A is cleared (S16).
- the HDMI communication processing unit 214 reads the message B from the second buffer 212, and the wireless communication unit 22 wirelessly transmits this message B to the wireless receiver 3.
- the HDMI communication processing unit 214 determines that “ACK” for the message B is not received for a certain period from the wireless receiver 3, for example, when the message B does not reach the receiving side, or an error occurs and the receiving side If the message B has been discarded, it is determined that a timeout has occurred, the message B is read again from the second buffer 212, and is retransmitted to the wireless receiver 3 (S17).
- the HDMI communication processing unit 314 receives the message B transmitted from the wireless transmitter 2 through the wireless communication unit 32, and the HDMI communication processing unit 314 stores the message B received from the wireless transmitter 2 in the second buffer 312 and wirelessly transmits “ACK” to the message B to the wireless transmitter 2. Then, the HDMI control unit 315 transmits the message B stored in the second buffer 312 to the sink device 4 via the HDMI output unit 33.
- the HDMI communication processing unit 214 determines that the transmission of the message B is completed, and the second The message B stored in the buffer 212 is cleared.
- the ACK may be implemented as an independent message, or may be transmitted along with the actual communication message for efficiency.
- the message and the ACK may be mounted on a one-to-one basis, or one ACK may be mounted on the ACK for a plurality of messages.
- FIG. 5 is a diagram for explaining another example of the wireless AV transmission method by the wireless transmission system according to the present invention.
- a sequence example when a type 3 message is wirelessly transmitted based on the system configuration of FIG. 1 will be described.
- the first to third buffers provided in the wireless transmitter 2 and the wireless receiver 3 are assumed to be FIFO buffers as in the case of type 2.
- the HDMI control unit 215 receives the messages A, B, and C classified into type 3 from the source device 1 in order (S21), the order in which these messages A, B, and C are received. Is added to the third buffer 213 (S22).
- the HDMI communication processing unit 214 reads the message A previously received from the third buffer 213 (S23), and the wireless communication unit 22 wirelessly transmits this message A to the wireless receiver 3.
- the HDMI communication processing unit 314 receives the message A transmitted from the wireless transmitter 2 via the wireless communication unit 32 (S 24), and the HDMI communication processing unit 314 receives the message A from the wireless transmitter 2.
- the received message A is stored in the third buffer 313 and “ACK” for the message A is wirelessly transmitted to the wireless transmitter 2.
- the HDMI control unit 315 transmits the message A stored in the third buffer 313 to the sink device 4 via the HDMI output unit 33 (S25).
- the HDMI communication processing unit 214 determines that the transmission of the message A is completed, and stores it in the third buffer 213. The stored message A is cleared (S26). Subsequently, the HDMI communication processing unit 214 reads the message B from the third buffer 213, and the wireless communication unit 22 wirelessly transmits this message B to the wireless receiver 3. When the HDMI communication processing unit 214 determines that “ACK” for the message B is not received from the wireless receiver 3 for a certain period, it determines that the timeout has occurred.
- the HDMI control unit 215 receives the message B ′ of the same type as the message B classified as type 3 from the source device 1 within the timeout determination period (S27), it is stored in the third buffer 213.
- Message B (not cleared because “ACK” has not been received) is rewritten to a new message B ′.
- the HDMI communication processing unit 214 reads the message B ′ from the third buffer 213, and the wireless communication unit 22 wirelessly transmits this message B ′ to the wireless receiver 3.
- the HDMI communication processing unit 314 receives the message B ′ transmitted from the wireless transmitter 2 via the wireless communication unit 32 and performs HDMI communication processing.
- the unit 314 stores the message B ′ received from the wireless transmitter 2 in the third buffer 313 and wirelessly transmits “ACK” for the message B ′ to the wireless transmitter 2.
- the HDMI control unit 315 transmits the message B ′ stored in the third buffer 313 to the sink device 4 via the HDMI output unit 33.
- the HDMI communication processing unit 214 determines that the transmission of the message B ′ is completed,
- the message B ′ stored in the 3 buffer 213 is cleared.
- accompanying data associated with video and audio can be transmitted by different transmission methods according to the characteristics thereof.
- the amount can be reduced. Further, even if transmission errors or missing data occur in the accompanying data, the accompanying data can be transmitted correctly. Further, it is possible to preferentially transmit accompanying data that needs to be sent quickly.
- the accompanying data can be transmitted using the same wireless channel as the video and audio transmission, it is not necessary to add another wireless channel for sending the accompanying data. Therefore, an antenna, an amplifier, a signal processing unit and the like for realizing an additional wireless channel are not necessary, and cost can be reduced.
- the radio frequency band (5 GHz band) that can be used without obtaining a license is used.
- the range of frequencies that can be used is determined by law, and other wireless devices that use the same frequency band (5 GHz band) (for example, wireless LANs) It is a mechanism to search for a range (frequency channel) and perform communication.
- the wireless AV transmission system of the present invention it is not necessary to add a frequency range (frequency channel) to be used. Therefore, the frequency range that can be used by other communication devices increases, and the opportunity for communication increases. become.
- DESCRIPTION OF SYMBOLS 1 ... Source device, 2 ... Wireless transmitter, 3 ... Wireless receiver, 4 ... Sink device, 11, 33 ... HDMI output part, 21, 31 ... Control part, 22, 32 ... Wireless communication part, 23, 41 ... HDMI Input unit, 211, 311 ... first buffer, 212, 312 ... second buffer, 213, 313 ... third buffer, 214, 314 ... HDMI communication processing unit, 215, 315 ... HDMI control unit.
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Communication Control (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
ソース機器1は、映像及び音声を出力可能な機器であればよく、例えば、STBなどのチューナ機器や、BD,DVD等の各種レコーダやプレーヤ、ゲーム機器などであってもよい。このソース機器1は映像出力機器としての機能を実現するための構成要素を備えているが、ここでの説明は省略する。
シンク機器4は、映像を表示し音声を出力可能な機器であればよく、例えば、モニタやチューナ付きテレビ装置などであってもよい。このシンク機器4は表示機器としての機能を実現するための構成要素を備えているが、ここでの説明は省略する。
ここで、無線送信機と無線受信機との間では、無線制御のために、無線通信制御情報、送信機,受信機の状態や、受信電力、品質などの各種パラメータの交換を行う。これらの情報は、順序通り伝送されないと送信機,受信機間の無線通信にずれが生じるため、タイプ2に分類される。
なお、上記例では、無線送信機2から無線受信機3に対して付随データを無線送信する場合について説明したが、例えば、EDIDは無線受信機3から無線送信機2に無線送信されるデータであり、CECメッセージは無線受信機3と無線送信機2との間で相互にやり取りされるものである。このため、無線受信機3から無線送信機2に対して付随データを無線送信する場合についても同様の処理を行えることは言うまでもない。また、これらのプロトコルで提供される伝送路では、接続されたHDMIの付随データだけではなく、無線機器間の制御情報の通信についても同様の分類を行うこともできる。
なお、上述のメッセージB′の更新においては、メッセージBに対するACKによりメッセージB′がクリアされる危険があるが、ACKに付随させた情報によって、どのデータに対するACKかを判定させたり、より簡単には、キューを送信処理待ち領域と、ACK待ち領域(一度送信処理を行いACKによるクリアを待っている領域)に分け、上書きを送信処理待ち領域に限るなどの実装を行うことで、データの欠落を防止することができる。
Claims (8)
- 表示機器と接続される第1無線通信機器と、映像出力機器と接続される第2無線通信機器とを備え、前記第1無線通信機器と前記第2無線通信機器との間で無線通信を行うことにより、前記映像出力機器から前記表示機器へ映像及び音声を出力する無線伝送システムであって、
前記第1無線通信機器及び/又は前記第2無線通信機器は、映像及び音声に付随する付随データをその特性に応じて分類し、該分類毎に異なる伝送方式で付随データを無線伝送することを特徴とする無線伝送システム。 - 請求項1に記載の無線伝送システムにおいて、前記第1無線通信機器及び/又は前記第2無線通信機器は、付随データの分類毎に、バッファを備えたことを特徴とする無線伝送システム。
- 請求項1又は2に記載の無線伝送システムにおいて、前記伝送方式として、再送の有無、送信順序の並び替えの有無を異ならせたことを特徴とする無線伝送システム。
- 請求項1~3のいずれか1項に記載の無線伝送システムにおいて、前記第1無線通信機器及び/又は前記第2無線通信機器は、付随データの特性に応じて複数の有線伝送ラインを備え、有線伝送ライン毎に付随データを分類することを特徴とする無線伝送システム。
- 請求項4に記載の無線伝送システムにおいて、前記第1無線通信機器及び/又は前記第2無線通信機器は、1つの有線伝送ラインで特性の異なる複数の付随データが伝送される場合、該複数の付随データをそのヘッダ情報に基づいて分類することを特徴とする無線伝送システム。
- 請求項4又は5に記載の無線伝送システムにおいて、前記表示機器と前記第1無線通信機器とがHDMI接続され、前記映像出力機器と前記第2無線通信機器とがHDMI接続され、
前記複数の有線伝送ラインは、HDMI規格におけるTMDSライン、CECライン、DDCライン、HPDラインで構成され、
前記付随データは、前記TMDSラインで伝送されるDIP、前記CECラインで伝送されるCECメッセージ、前記DDCラインで伝送されるHDCP認証用メッセージ、前記HPDラインで伝送されるホットプラグ信号を含み、
前記分類として、前記DIPを含む第1のタイプと、前記CECメッセージ及び前記HDCP認証用メッセージを含む第2のタイプと、前記ホットプラグ信号を含む第3のタイプとに分けることを特徴とする無線伝送システム。 - 請求項6に記載の無線伝送システムにおいて、前記第2無線通信機器は、前記DIPのうち、映像及び音声の視聴中に変化する画質または音声調整用のデータを前記第1のタイプに分類し、映像出力源の切り替え時に変化するデータを前記第3のタイプに分類することを特徴とする無線伝送システム。
- 請求項6又は7に記載の無線伝送システムにおいて、前記第1のタイプの伝送方式は、再送と送信順序の並べ替えとを行わない方式であり、前記第2のタイプの伝送方式は、再送を行い、送信順序の並べ替えを行わない方式であり、前記第3のタイプの伝送方式は、再送と送信順序の並べ替えとを行い、バッファ内に残る状態変化前の古い付随データを更新する方式であることを特徴とする無線伝送システム。
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US13/131,888 US8565252B2 (en) | 2008-12-01 | 2009-10-21 | Wireless transmission system, device and method for efficiently transmitting associated data |
EP09830267A EP2355505A4 (en) | 2008-12-01 | 2009-10-21 | RADIO TRANSMISSION SYSTEM |
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Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2343907A4 (en) * | 2008-10-10 | 2012-06-20 | Lg Electronics Inc | RECEPTION SYSTEM AND METHOD OF PROCESSING DATA |
CN103686320A (zh) * | 2012-09-14 | 2014-03-26 | 深圳鑫晔广科技有限公司 | 数字家庭设备无线连接系统及方法 |
KR102133711B1 (ko) * | 2013-04-29 | 2020-07-14 | 삼성전자 주식회사 | 무선 통신 시스템에서 사용자 디바이스의 보호 콘텐츠 데이터 전송 방법 및 사용자 디바이스 |
US9728227B2 (en) * | 2013-07-24 | 2017-08-08 | Ricoh Company, Ltd. | Display system, information terminal, display device, and recording medium |
CN103607662A (zh) * | 2013-11-21 | 2014-02-26 | 乐视致新电子科技(天津)有限公司 | 一种智能电视设备中的通信协议控制方法和装置 |
JP6460119B2 (ja) * | 2014-11-17 | 2019-01-30 | 日本電気株式会社 | 映像処理システム、送信装置、映像処理方法、送信方法およびプログラム |
WO2016122213A1 (ko) * | 2015-01-28 | 2016-08-04 | 엘지전자(주) | Hdmi를 사용하여 데이터를 송수신하기 위한 방법 및 그 장치 |
CN105100731B (zh) * | 2015-08-24 | 2019-04-12 | 浙江宇视科技有限公司 | 一种移动视频监控系统的移动中心及移动视频监控方法 |
CN105872485A (zh) * | 2016-06-06 | 2016-08-17 | 贵州大学 | 用于智能交通的基于fpga图像压缩传输装置及方法 |
JP6911489B2 (ja) * | 2017-04-25 | 2021-07-28 | オムロン株式会社 | 状態表示装置、状態表示システム及び無線送信装置 |
US10306307B2 (en) * | 2017-06-30 | 2019-05-28 | Apple Inc. | Automatic configuration of video output settings for video source |
JP6832823B2 (ja) * | 2017-09-29 | 2021-02-24 | シャープ株式会社 | 認証システム及びサーバ装置 |
CN110233705B (zh) * | 2019-06-11 | 2022-04-26 | 江苏深蓝航天有限公司 | 基于无线通信方式的信号传输系统 |
JP7178035B2 (ja) * | 2020-08-11 | 2022-11-25 | コンテンツライツ合同会社 | 情報処理装置、情報処理プログラムおよび記録媒体 |
CN112118408B (zh) * | 2020-09-10 | 2023-03-24 | 深圳印像数据科技有限公司 | 一种基于hdmi传输输入事件的方法 |
WO2023064111A1 (en) | 2021-10-11 | 2023-04-20 | Vitro Flat Glass Llc | Heat-treatable coating having reduced haze |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007037379A1 (ja) * | 2005-09-30 | 2007-04-05 | Matsushita Electric Industrial Co., Ltd. | 無線伝送システム |
JP2008022560A (ja) * | 2006-02-10 | 2008-01-31 | Matsushita Electric Ind Co Ltd | 無線通信システム |
JP2008035517A (ja) * | 2006-02-14 | 2008-02-14 | Matsushita Electric Ind Co Ltd | 無線通信システム |
JP2008048137A (ja) * | 2006-08-15 | 2008-02-28 | Sony Corp | 伝送システム、映像入力装置及び伝送方法 |
JP2008113198A (ja) * | 2006-10-30 | 2008-05-15 | Sony Corp | 伝送方法、伝送システム、送信装置及び受信装置 |
JP2008283469A (ja) | 2007-05-10 | 2008-11-20 | Sharp Corp | 中継機器及びその制御方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8605623B2 (en) * | 2002-05-31 | 2013-12-10 | Koninklijke Philips N.V. | Determining and configuring a communication path in a network |
GB2429866B (en) * | 2004-01-16 | 2009-05-06 | Trek 2000 Int Ltd | A portable storage device for recording and playing back data |
JP2006067540A (ja) | 2004-07-27 | 2006-03-09 | Toshiba Corp | 信号再生装置及び信号再生方法 |
CN1728807A (zh) * | 2004-07-27 | 2006-02-01 | 株式会社东芝 | 信号再现设备和信号再现方法 |
US8320446B2 (en) | 2004-11-24 | 2012-11-27 | Qformx, Inc. | System for transmission of synchronous video with compression through channels with varying transmission delay |
US20060209892A1 (en) * | 2005-03-15 | 2006-09-21 | Radiospire Networks, Inc. | System, method and apparatus for wirelessly providing a display data channel between a generalized content source and a generalized content sink |
US7499462B2 (en) * | 2005-03-15 | 2009-03-03 | Radiospire Networks, Inc. | System, method and apparatus for wireless delivery of content from a generalized content source to a generalized content sink |
WO2007091706A1 (ja) | 2006-02-10 | 2007-08-16 | Matsushita Electric Industrial Co., Ltd. | 無線通信システム |
WO2007094347A1 (ja) * | 2006-02-14 | 2007-08-23 | Matsushita Electric Industrial Co., Ltd. | 無線通信システム |
JP4772867B2 (ja) * | 2006-05-19 | 2011-09-14 | パナソニック株式会社 | 論理アドレス割り当て方法 |
JP4887129B2 (ja) | 2006-12-14 | 2012-02-29 | 株式会社Kddi研究所 | 更新情報生成装置、識別情報更新システム、識別情報更新方法およびプログラム |
US8045552B2 (en) * | 2008-01-03 | 2011-10-25 | Sony Corporation | Wired exchange of control information in wireless system |
-
2008
- 2008-12-01 JP JP2008306541A patent/JP5185794B2/ja not_active Expired - Fee Related
-
2009
- 2009-10-21 US US13/131,888 patent/US8565252B2/en not_active Expired - Fee Related
- 2009-10-21 RU RU2011127000/07A patent/RU2475996C1/ru not_active IP Right Cessation
- 2009-10-21 MX MX2011005515A patent/MX2011005515A/es active IP Right Grant
- 2009-10-21 EP EP09830267A patent/EP2355505A4/en not_active Withdrawn
- 2009-10-21 CN CN2009801491008A patent/CN102227912B/zh not_active Expired - Fee Related
- 2009-10-21 WO PCT/JP2009/068102 patent/WO2010064499A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007037379A1 (ja) * | 2005-09-30 | 2007-04-05 | Matsushita Electric Industrial Co., Ltd. | 無線伝送システム |
JP2008022560A (ja) * | 2006-02-10 | 2008-01-31 | Matsushita Electric Ind Co Ltd | 無線通信システム |
JP2008035517A (ja) * | 2006-02-14 | 2008-02-14 | Matsushita Electric Ind Co Ltd | 無線通信システム |
JP2008048137A (ja) * | 2006-08-15 | 2008-02-28 | Sony Corp | 伝送システム、映像入力装置及び伝送方法 |
JP2008113198A (ja) * | 2006-10-30 | 2008-05-15 | Sony Corp | 伝送方法、伝送システム、送信装置及び受信装置 |
JP2008283469A (ja) | 2007-05-10 | 2008-11-20 | Sharp Corp | 中継機器及びその制御方法 |
Non-Patent Citations (2)
Title |
---|
HIGH-DEFINITION MULTIMEDIA INTERFACE SPECIFICATION, 10 November 2006 (2006-11-10) |
See also references of EP2355505A4 |
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RU2475996C1 (ru) | 2013-02-20 |
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US8565252B2 (en) | 2013-10-22 |
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