System of wireless transfer

FIELD: radio engineering, communication.

SUBSTANCE: wireless transfer system comprises the following components: a wireless receiver (3), connected with a receiver device (4); and a wireless transmitter (2), connected with a source device (1). Wireless communication is executed between the wireless receiver (3) and the wireless transmitter (4) so that video and audio are taken out of the source device (1) to the receiver device (4). The wireless receiver (3) and/or the wireless transmitter (2) classifies data that accompanies video and audio, in accordance with their characteristic and sends accompanying data by means of using different methods of transfer depending on classification.

EFFECT: possibility to transfer data that accompanies video and audio by means of various modes of transfer depending on data characteristic in a wireless transfer environment, when a pass band is narrow, and a transfer error occurs easily.

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The technical FIELD TO WHICH the INVENTION RELATES

The invention relates to a system for wireless transmission, and more particularly to a wireless transmission system for wireless connection of devices compatible with HDMI, etc. with each other.

PRIOR art

Digital interface HDMI widely used as interfaces for transmission of audio/video, etc. HDMI organized for AV (Audio Visual) devices by adding the function of sending audio and security features copyright to the standard DVI (Digital video Interface), which is a standard digital connection between the computer and the display. In the case of HDMI, image data (video)/audio data is transmitted in a mode called TMDS Differential Signal Transmission Minimized Differential Levels).

The CEC Directive was added to the HDMI standards, starting with Version 1.2a (see, for example, "Supplement 1 Department of Consumer Electronics (CEC)in non-Patent document 1). The CEC Protocol is a control Protocol that manages between devices connected via an HDMI cable. The CEC Protocol allows to realize various control actions, based on the unique physical and logical addresses assigned to a device on the am, represented in the network HDMI. For example, if the user is playing on a connected via HDMI DVD player (Digital Versatile Disk) when viewing a digital broadcast on a television device, the television device independently automatically switches the input terminal from the terminal receiving the broadcast, the terminal connected to the DVD player. Control menu displayed by the DVD player on/off, etc. may be carried out using remote control television devices.

Concepts related to CEC, defined in non-Patent document 1; thus, those devices that have an input terminal HDMI, defined as device-recipients; and those that have output the HDMI terminal for outputting of the AV stream, is defined as the source device. Those devices that are defined as devices-repeaters, have an input terminal and an output terminal HDMI input/output AV stream to play the role as the recipient and the source device. Device-recipients mainly include the display device; examples of devices include STB (Subscriber Receiver), different players for DVD, BD (Blu-ray), etc. and various recording devices for DVD, BD and so on; and examples of repeaters include the impact of the AV amplifier, etc.

HDMI device configured to transfer the AV streams and related data associated with the AV streams, using an HDMI cable (see, for example, Patent Document 1). Related data include, for example, the CEC message, used for management between devices, and message authentication used to authenticate (HDCP Protection bandwidth Digital Content), and in relation to which is the mutual exchange between devices in parallel with the transmission of the AV stream.

The DOCUMENTS of the PRIOR art

PATENT DOCUMENTS

Patent Document 1: Published publication of the Japan Patent No. 2008-283469.

Non-PATENT DOCUMENT

Non-patent Document 1: High-Definition Multimedia Interface Specification Version l.3a, November 10, 2006.

A BRIEF DESCRIPTION of the INVENTION

Objectives of the INVENTION

Recently, attempts are being made wireless transmission of audio/video and associated data that, between devices that are compatible with the HDMI standard. This system of wireless transmission uses limited resources (including CPU, bandwidth etc) wireless transmitter/receiver for performing processing for wireless transmission of audio/video and associated data.

In the case of wireless transmission, Prosecutor, generally limited and often there are errors due to the wireless characteristics. In particular, since the frequency band is preferably assigned to video/audio, related data, such as information about the format and control information associated with audio/video, is assigned to only a narrow band of frequencies, which leads to a higher probability of transmission errors.

As all associated data conditionally are treated equally irrespective of performance related data, for example, associated data, for which the transmission speed is important and a small loss of data is acceptable, and related data for which transmission speed is not so important, but the loss of data is unacceptable, are transmitted in the same transmission mode and, consequently, becomes a problem that affects the efficiency, and that the associated data is not correctly transmitted, if the growing amount of data that must be transferred, or if an error occurs during the transmission or loss of data.

The present invention was conceived in consideration of the problem, and, as a consequence, the aim of the present invention is the provision of a system for wireless transmission, which allows the transfer of related data that is related to video/audio in different transmission modes depending on their characteristics in the wireless transmission, having a narrow bandwidth and easily causing a transmission error.

MEANS of SOLVING PROBLEMS

To solve the above problems, a first technical means is the wireless transmission system that contains the first wireless device is connected to the display device; and a second communication device connected to the video output device, the wireless transmission system displays video and audio of the video display device through the wireless communication between the first wireless device and the second wireless device and the first wireless communication device and/or the second wireless communication device classifies the associated data that is associated with video and audio, depending on their characteristics, and transmits the wireless image related data in different modes of transmission in relation to the corresponding classes.

A second technical means is the wireless transmission system of the first technical means, the first wireless communication device and/or the second wireless communication device includes buffers for each class of related data.

The third technical means is the wireless transmission system of the first technical means, the presence/absence of the influence of re-transmission and the presence/absence of permutations of the order of transfer can vary between transmission modes.

A fourth technical means is the wireless transmission system of the first technical means, the first wireless communication device and/or the second wireless communication device includes multiple wired transmission lines depending on the characteristics of the associated data, and the first wireless communication device and/or the second wireless communication device classifies the associated data for each of the wired transmission lines.

The fifth technical means is the wireless transmission system of the fourth technical means, the first wireless communication device and/or the second wireless communication device classifies many related data based on their header information, when a lot of associated data with different characteristics, are passed through one wire transmission line.

A sixth technical means is the wireless transmission system of the fourth technical means, and the display device are connected through HDMI with the first wireless device and the video output device are connected through HDMI with the second wireless communication, multiple wired transmission line consists of a line TMDS line CEC, DDC line and the HPD line of the HDMI-related data include DIP, peredavaemogo line TMDS the CEC message transmitted through the CEC line, the HDCP authentication message transmitted through the DDC line, and the signal hot plug passed through the HPD line, and classes are divided into the first type, including DIP, the second type, which includes the message CEC and HDCP authentication message, and the third type, which includes a signal hot plug.

A seventh technical means is the wireless transmission system of the sixth technical means, with respect to the DIP, the second wireless communication device classifies the data to adjust picture quality or audio that change while watching/listening to video and audio, like the first type, and data, which are changed at the time of switching the video source output as the third type.

The eighth technical means is the wireless transmission system of the sixth technical means, and the transmission mode of the first type is a mode in which retransmission and the permutation of the order of transfer is not performed, the transmission mode of the second type is a mode in which the transmission will be repeated, while the permutation of the order of transfer is not executed, and the transfer mode of the third type is a mode that performs retransmission or rearrange the order of transfer, and clip frame is to update old related data, remaining in the buffer until the state changes.

The TECHNICAL RESULT of the INVENTION

In accordance with the present invention, as related data associated with the video/audio can be transmitted in different transmission modes depending on their characteristics in the environment of wireless transmission, having a narrow bandwidth and easily causing a transmission error can be reduced by the amount of data that must be transferred. Even if linked data is a transmission error, loss of data, etc. related data can be transmitted correctly. Associated data for which you want a fast transfer may be transferred with preference.

BRIEF DESCRIPTION of DRAWINGS

[Fig. 1] Fig. 1 is a structural diagram of typical system configuration wireless transmission in accordance with one embodiment of the present invention.

[Fig. 2] Fig. 2 is a diagram of an example of a table that describes classes of related data and the transmission mode for each class.

[Fig. 3] Fig. 3 is a diagram for explaining the example method of the wireless AV transmission used in the wireless transmission system in accordance with the present invention.

[Fig. 4] Fig. 4 is a diagram for explaining another example of the method of the wireless AV transmission used in the system is e wireless transmission in accordance with the present invention.

[Fig. 5] Fig. 5 is a diagram for explaining an additional example of how wireless AV transmission used in the wireless transmission system in accordance with the present invention.

Embodiments of the INVENTION

Now will be described the preferred embodiments of the wireless transmission system of the present invention with reference to the accompanying drawings. Although the following embodiments of described via a typical illustration of HDMI devices, the present invention is applicable to wireless devices capable of wireless image transmission video/audio and associated data that are associated with video/audio.

Fig. 1 is a structural diagram of typical system configuration wireless transmission in accordance with one embodiment of the present invention. In Fig. 1, 1 denotes a source device corresponding to the output video; 2 denotes a wireless transmitter that corresponds to the second wireless device; 3 denotes a wireless receiver corresponding to the first wireless communication; and 4 designates the device of the recipient corresponding to the display device. Wireless transmitter 2 and the wireless receiver 3 wireless image is connected and the device is a repeater consists of a wireless transmitter 2 and the wireless receiver 3. This wireless transmission system includes a wireless receiver 3 connected via HDMI device receiver 4, and a wireless transmitter 2 connected via HDMI device source 1, and is configured to display video and audio from the source device 1 to the device receiver 4 through the wireless communication between the wireless transmitter 2 and the wireless receiver 3.

Despite the fact that the first wireless device and the second wireless communication device of the present invention are devices capable of wireless transmission and reception, the first wireless device and the second wireless device is referred to as the wireless receiver 3 and the wireless transmitter 2, respectively, for convenience of explanation.

First will be described the device of the transmitting side, consisting of the source device 1 and the wireless transmitter 2.

The source device 1 may be any device capable of outputting video and audio, and can be, for example, a tuner device, such as STB, various recorders and players for BD, DVD, etc. and gaming device. Despite the fact that the source device 1 includes components to implement the functions as video,these elements will not be described.

In Fig. 1, the source device 1 includes a section 11 HDMI output and connected via HDMI wireless transmitter 2. Section 11 HDMI is HDMI I/F (interface) to connect the HDMI cable. The HDMI cable includes a CEC line, which is a bidirectional bus for transmission to the common device control signal (CEC message).

The HDMI cable also includes, in addition to the CEC line, the TMDS line for streaming video/audio signals, which are digital signals in differential form, line DDC (Display Data Channel) is used for transmission of the EDID (Extended Display Identification Data) and send the message identification is used to authenticate HDCP, line HPD (Hot plug Detection) to transmit a signal hot plug, providing a notification about detection devices, etc. EDID includes information about the type of signals to be processed by the display device, information such as the resolution of the display panel, and information, such as pixel clock, horizontal effective range and vertical effective range. EDID receives from the video display device of the recipient 4) by hand, transmitting video (device 1), and the party transmitting the video transmits video, adaptirovan the th to the resolution of the display panel, which should be used (in this example, the display panel device of the recipient 4). EDID device of the receiver 4 can be copied and stored in the wireless transmitter 2, and, in this case, the source device 1 can access to the wireless transmitter 2 to obtain the EDID device of the receiver 4.

Wireless transmitter 2 consists mainly of section 21 of the control section 22 wireless and section 23 of the HDMI input. Section 23 of the HDMI input is HDMI I/F for connecting the above-described HDMI cable to get the HDMI connection to the device source 1, and is connected to the section 11 of the HDMI source device 1 through the HDMI cable. Connection using an HDMI cable between the section 11 HDMI output and section 23 of the HDMI input allows the source device 1 and the wireless transmitter 2 to transmit/receive various messages, such as messages CEC and message authentication.

Section 21 of the control consists of the first buffer 211, the second buffer 212, the third buffer 213, section 214 of the processing HDMI connection and section 215 of the control HDMI. Section 215 of the control for HDMI is connected with the section 23 of the HDMI input through the AV (video/audio) line and line messages. Section 214 of the processing HDMI connection is connected to the section 22 of the wireless communication through the AV line and line messages. In this case, the transmission line of the video/audio data is defined as AV line, and linyphiidae other related data (such as messages and information management) is defined as a line messages instead of classifying in HDMI TMDS line, line CEC line DDC, HPD line and the like.

Section 22 wireless converts video, audio, and messages received from section 214 processing HDMI connection, in a format that can be transmitted over the air and the air passes the converted video, and audio messages to the wireless receiver 3.

Now will be described device of the receiving party, comprising the device of the receiver 4 and the wireless receiver 3.

The receiver 4 may be any device capable of displaying video and audio output, and can be, for example, a monitor or television device with a tuner. Despite the fact that the receiver 4 includes components to implement the functions as a display device, these elements will not be described.

In Fig. 1 device-receiver 4 includes a section 41 HDMI input and is connected through HDMI wireless receiver 3. Section 41 HDMI input is HDMI I/F for connecting an HDMI cable. Section 41 HDMI input connects line (line CEC line TMDS, DDC line and the HPD line), made in the HDMI cable, as in the case of the source equipment 1.

Wireless receiver consists mainly of section 31 of the control section 32 wireless and section 33 of the HDMI output. Section 33 HDMI is HDMI I/F for connection of Sanogo above, HDMI cable to get the HDMI connection to the device receiver 4, and is connected with the section 41 HDMI input device of the receiver 4 through the HDMI cable. Connection using an HDMI cable between the section 41 HDMI input and section 33 of the HDMI output allows the device to a receiver 4 and the wireless receiver 3 to transmit/receive various messages, such as the CEC message, and message authentication.

Section 31 of the control consists of the first buffer 311, the second buffer 312, the third buffer 313, section 314 processing HDMI connection and section 315 control HDMI. Section 315 of the control for HDMI is connected with the section 33 of the HDMI output through the AV (audio/video) line and line messages. Section 314 processing HDMI connection is connected with the section 32 of the wireless communication through the AV line and line of the message.

The main difference of the present invention is to transmit associated data that are associated with video/audio in different transmission modes depending on their characteristics in the environment of wireless transmission, having a narrow bandwidth and easily causing a transmission error. In this regard, the control section 21 included in the wireless transmitter 2, and section 31 controls that are included in the wireless receiver 3, is arranged to operate so that related data associated with the video and audio were classified depending on their ha is acteristic for wireless transmission of related data in different transmission modes for each class. In particular, the control section 21 and section 31 controls provide buffers (in this example, the first buffer according to the third buffer) for the respective classes of related data and distinguish between the presence/absence of retransmission and the presence/absence of permutations of order transmission modes for transmitting the associated data.

Fig. 2 is a diagram of an example of a table that describes classes of related data and the transmission mode for each class. This table is stored in a storage device (not illustrated)provided in section 21 of the control section 31 controls, and section 215 of the control HDMI and section 315 control HDMI if necessary, refer to the table. In this example, the associated data are classified into three types depending on their characteristics. Type 1 includes data that require high transfer speeds, but which allow the low reliability of transmission, and the transmission mode is represented as "retransmission: no" and "permutation of the order of transfer: no. Type 2 includes data that do not require high transfer speeds, but require high reliability of transmission (transmission is necessarily consecutively), and the transmission mode is represented as "retransmission: Yes" and "permutation of the order of transfer: no. Type 3 includes the data, which is output not require a high transmission rate, but require high reliability of the transmission and which may be reset old data of the same kind remaining in the queue (buffer), only the moment can be transmitted by the latter is continuously updated data, and the transmission mode is represented as "retransmission: Yes" and "permutation of the order of transfer: Yes (old information remains in the queue until the status changes, reset (FIFO))".

In relation to criterion by definition, types 1, 2 and 3, for example, associated data, which are changed while watching the video and audio belong to the class of type 1; the associated data, which are commands or procedures for authentication, belong to the class of type 2; and associated data, which are changed when switching video source, such as switching to a different source device, belong to the class of type 3.

Thus, the data are classified as type 1, where speed transmission. Data classified as type 1, is repeatedly transmitted at regular intervals from the transferor, regardless of changes, and from the host does not return any acknowledgement (ACK). After the data is received, the receiving side performs any necessary processing, if on the basis of the reception state has changed. The data is, classified as type 1, have limited the data traffic and a higher refresh rate at a certain speed data and correspond to the state information, which changes synchronously with the video/audio, such as, for example, information about the volume (loudness) and information management muting audio/video included in the DIP (Isolated Package Data).

The data are classified as type 2, when the transmission speed is not important, but the data must be transferred in its entirety. Data is stored in the queue (FIFO) on the transmission side and transmitted sequentially, when the transfer can be made, and if the receiving party does not return the confirmation and subsequent relevant data is retransmitted. Once the data is accepted from the host is returned to the disclosing party ACK and executes processing corresponding to the accepted data. In relation to data classified as type 2, is not permitted restructuring order and loss of data, and they include, for example, the message CEC (CEC), the message authentication HDCP, EDID (DDC) and the management information of the wireless communication between the wireless transmitter and wireless receiver. However, the EDID is information device and usually constant and for this reason may be classified the Ana as type 3.

The data are classified as type 3, when the transmission speed is not important, but is only required notification of the state. As in the case of type 2, data is stored in the queue (FIFO) on the transmission side and transmitted sequentially, when it can be transferred, and if the receiving party does not return the acknowledgement (ACK)corresponding to and subsequent data is retransmitted. Unlike type 2 is that if the losing party in the queue already exist data of the same kind, the old data is replaced with new data and the old data is discarded. Once the data is accepted from the host is returned to the disclosing party ACK and executes processing that corresponds to the accepted data. Despite the fact that ACK and retransmission is required as in the case of type 2, however, when the video source switches and change the data, the data is exactly the same, the transmission of which is not completed, always overwritten and discarded, and, consequently, the total amount of data in comparison with the type 2 is reduced. Type 3 includes, for example, information about the video/audio information light control, color correction information (DIP) and the signal hot plug (HPD). DIP is information that is periodically transmitted regardless of the presence of changes in HDMI as in the case of the type 1, and if the state is stored on the transmitting side and the receiving side, type 3 sends only the changed element, and can be significantly reduced connection over the wireless section.

Hereinafter will be specifically described types of classes for linked data (messages)transmitted through the CEC line, line TMDS, DDC line and the HPD line of the HDMI standard.

The CEC line is used to transmit messages CEC, which are different commands that are used to coordinate devices HDMI (for example, the signals of the remote control signals on/off and signal switching input) and CEC messages for information transfer characteristic of the device, for example, information about the strength of reception in the case of wireless. Because the transmission must be certainly consistently, these messages are classified as type 2.

Wireless transmitter and wireless receiver exchange information manage the wireless connection and the status of the transmitter and receiver, as well as various other parameters of the electric power reception quality, etc. for wireless control. These information elements are classified as type 2, since the wireless link between the transmitter and receiver raccoglitore, the CMOS transmission is not performed consistently.

The TMDS line is used for transmission of audio/video and DIP. Audio and DIP transmitted during the blackout video. DIP mainly transmits data associated with the video/audio, such as the permission information, the information content protection, may transfer specified by the manufacturer of the frame and may also transmit information about the average brightness, autoparametric etc. If at the implementation level on the transmission side of the DIP is in the register, the DIP is transmitted for each frame and can be read on the receiving side on the arrival of the DIP.

There are two main types of DIP (type 1 and 3) based on the characteristics of the data. For example, the management information highlighting (or the value of brightness for lighting control), information processing settings of image quality (such as the state of the OSD display), information control mute audio/video, information volume and information on the admissibility/inadmissibility audio (HDMI information to prevent the occurrence of abnormal noise in an invalid section) are classified as type 1, since the transmission delay affects the view. For example, item ID and the Information Frame Manufacturer (i.e. vendor-specific and not changeable) are devices and do not change after connection, and therefore are classified to the to type 3, and the valid/invalid information of the video signal, information related to the video setup information relating to the resolution, the security information of the audio content and information of the color space as well are classified as type 3, because these items of information are changed at the time of switching the video source and not always constantly changing.

Information of admissibility/inadmissibility audio HDMI and valid/invalid information of the video signals are pieces of information indicating the condition of admissibility/inadmissibility state video and audio output on the transmitting side. Consequently, when the transmitting side is received, an invalid signal, these information elements are used to ignoring the signal on the receiving side, and this prevents the on-screen noise and abnormal noise due to the display/audio output based on invalid data.

The DDC line is used to transmit EDID and message authentication HDCP. EDID is device information relating to the specifications, such as information about possible to display on the display device the format is not changed after the connection despite the fact that the transfer should be performed surely and, therefore, classified as type 2 or type 3. Message AU is entifically HDCP is used to exchange the key information in accordance with the sequence of authentication, based on the Protocol with a predetermined procedure, and should be sent immediately sequentially, and therefore, is classified as type 2.

The HPD line is used to transmit a signal hot plug. Signal hot plug provides notification that the detected device, and is classified as type 3, since no doubt can be transmitted to the last state.

Wireless transmitter 2 and the wireless receiver 3 include a variety of wired transmission lines (line CEC line TMDS, DDC line and the HPD line), corresponding to the characteristics of the associated data. In the method of classification related data via the wireless transmitter 2 and the wireless receiver 3 related data can be classified with respect to each of the wired transmission lines. If through one wire transmission line is transmitted to the set of related data with different characteristics, the associated data may be classified based on their header information.

Associated data includes DIP transmitted through the TMDS line, the CEC message transmitted through line CEC, EDID and HDCP authentication message transmitted through the DDC line, and the signal hot plug passed through the HPD line, and are classified as t is 1 (the first type), includes DIP, type 2 (the second type), including message CEC, EDID and HDCP authentication message, and type 3 (the third type), which includes a signal hot plug. In respect of the DIP, the data for picture quality or audio, changing while watching/listening to video and audio, are classified as type 1, and the data changing at the time of switching of the source video output, are classified as type 3. EDID can be classified as type 3.

In Fig. 1, the wireless transmitter 2, section 215 of the control HDMI classifies the associated data supplied from the section 23 HDMI input on the basis of a transmission line, the header information and the table shown in Fig. 2, stores the associated data classified as type 1, in the first buffer 211, and stores the associated data classified as type 2, the second buffer 212, and stores the associated data classified as type 3, in the third buffer 213. When transmitting wireless image related data stored in the buffers, the wireless receiver 3, the processing section 214 HDMI connection can add information identifying the type to identify the type in the header, etc. related data. When receiving the associated data from the wireless transmitter 2, the wireless receiver stores the associated data type 1 in the first buffer 311, and stores the associated data type 2 in the second Boo the ore 312 and stores the associated data type 3 in the third buffer 313 on the basis of information of identification of type, added to the header. If the type 2 and type 3 are implemented in such a way that the difference exists only in the queue at the time of transfer, the receiving buffer on the receiving side can be shared between type 2 and type 3.

Thus, the wireless transmitter 2 performs transmission processing based on the Protocol type and the wireless receiver 3 performs reception processing on the basis of the Protocol of the corresponding type.

Although the sample was completed with the description of the case, when the related information wireless way are transmitted from the wireless transmitter 2 to the wireless receiver 3, however, for example, EDID data are transmitted wireless manner from the wireless receiver 3 to the wireless transmitter 2, and the message CEC mutually exchanged between the wireless receiver 3 and the wireless transmitter 2. Consequently, it is obvious that similar processing can be carried out in case of transmission of wireless image related data from the wireless receiver 3 to the wireless transmitter 2. The transmission channels provided by these protocols can similarly be used to classify the communication of management information between wireless devices.

Fig. 3 is a schematic diagram explaining an example of the way wireless is th AV transmission, used in the wireless transmission system in accordance with the present invention. This example explains an example of a sequence when related data (hereinafter, message) type 1 is transmitted over the air on the basis of the system configuration of Fig. 1. On the transmission side, the first buffer 211 stores A, B, C, D" as a type 1 message. Section 214 of the processing HDMI connection message reads "A, B, C, D" from the first buffer 211, and section 22 of the wireless communication periodically wireless image transfers this message to the wireless receiver 3. The message that is received from the transmitting side, is compared with the message type 1 stored in the first buffer 311, on the receiving side, and if it has not changed, the message in the first buffer 311 leave unchanged.

The wireless transmitter 2, if the message is classified as type 1, from the source device 1 (S1), section 215 of the control HDMI identifies and overwrites the corresponding message of the same type in the message "A, B, C, D"stored in the first buffer 211 (S2). In this example, it is assumed that the data "C" is overwritten on the data "E". Section 214 of the processing HDMI connection message reads "A, B, E, D" from the first buffer 211 (S3), and section 22 of the wireless communication periodically wireless image transfers this message to the wireless receiver 3

The wireless receiver 3, section 314 processing HDMI connection takes through section 32 wireless message "A, B, E, D, transmitted from the wireless transmitter 2 (S4), and section 314 of the communication processing HDMI compares the message received from the wireless transmitter 2, with the message stored in the first buffer 311, and updates the message, if there is a change (S5). In this example, because the message "A, B, E, D" received from the wireless transmitter 2, and the message stored in the first buffer 311 is "A, B, C, D", then the message has changed, and consequently the contents of the first buffer 311 is updated. Section 315 of the control HDMI transmits the message "A, B, E, D, updated/stored in the first buffer 311, through a section of the HDMI device to a receiver 4 (S6).

If the message transmitted over the air from the transmitting side, not reached the receiving side, in this example, the buffer on the receiving side is not updated; however, transmission is performed regardless of the changes, and, consequently, both buffers are synchronized when the message comes in the next time.

Fig. 4 is a diagram for explaining another example of the method of the wireless AV transmission used in the wireless transmission system in accordance with the present invention. This example explains an example of the sequence when the message type 2 wireless image is transferred on the basis of the system configuration of Fig. 1. In this example, it is assumed that the first through third buffers included in the wireless transmitter 2 and the wireless receiver 3 are FIFO buffers.

The wireless transmitter 2, the sequential reception of messages A, B, classified as type 2, from the source device 1 (S11), section 215 of the control HDMI adds these messages A, B in the second buffer 212 in the order received (S12). Section 214 of the processing HDMI connection reads a previously received message from A second buffer 212 (S13) and section 22 wireless wireless image transfers this message to A wireless receiver 3.

The wireless receiver 3, section 314 processing HDMI connection takes through section 32 wireless a message transmitted from the wireless transmitter 2 (S14), and section 314 processing HDMI connection saves A message, received from the wireless transmitter 2, the second buffer 312 and transmits wireless image of the "ACK" message to A wireless transmitter 2. Section 315 of the control HDMI transmits a message stored in the second buffer 312, through section 33 of the output to the secondary 4 (S15).

In the wireless transmitter, when receiving through the section 22 wireless "ACK"is sent from the wireless receiver 3, the processing section 214 HDMI connection determines that the transmission of A message is completed, and deletes the message A, stored in the second booth is re 212 (S16).

Section 214 of the processing HDMI connection B reads the message from the second buffer 212, and section 22 of the wireless communication transmits wireless, this message B wireless receiver 3. If it is determined that the wireless receiver 3 within a specified period not accepted "ACK" message to B, for example, if the message B has not reached the receiving party or if an error occurred and the message B is reset by the receiving party, then the processing section 214 HDMI connection determines that there was a time limit is exceeded, and again reads the message B from the buffer 212 to re-send the message B wireless receiver 3 (S17).

As in the case of A message, the wireless receiver 3, section 314 processing HDMI connection takes through section 32 wireless message B sent from the wireless transmitter 2, and section 314 of the communication processing HDMI stores the message B received from the wireless transmitter 2, the second buffer 312 and transmits over the air wireless transmitter 2 "ACK" message B. Section 315 control HDMI transmits the message B stored in the second buffer 312, through section 33 of the HDMI device to a receiver 4.

The wireless transmitter 2, when taken through section 22 wireless "ACK"is sent from the wireless receiver 3, the processing section 214 HDMI connection determines that transmission of the message B is finished, and deletes the message B stored in the second buffer 212. ACK can be implemented as an independent message or may be transmitted with reference to the actual message communication in order to improve efficiency. ACK can be implemented in such a way that exactly match the message, or may be implemented in such a way that the ACK served as ACK for multiple messages.

Fig. 5 is a diagram for explaining an additional example of how wireless AV transmission used in the wireless transmission system in accordance with the present invention. This example explains an example of a sequence when the message type 3 is transmitted over the air on the basis of the system configuration of Fig. 1. It is assumed that the first through third buffers included in the wireless transmitter 2 and the wireless receiver 3 are FIFO buffers.

The wireless transmitter 2, the sequential reception of messages A, B, C, classified as type 3, from the source device 1 (S21), section 215 of the control HDMI adds the message data A, B, C in the third buffer 213 in the order received (S22). Section 214 of the processing HDMI connection receives a message from A third buffer 213 (S23), and section 22 wireless wireless image transfers this message to A wireless receiver 3.

In the wireless receiver , section 314 processing HDMI connection takes through section 32 wireless a message transmitted from the wireless transmitter 2 (S24), and section 314 processing HDMI connection saves A message, received from the wireless transmitter 2, in the third buffer 313 and wireless image transmits "ACK" message to A wireless transmitter 2. Section 315 of the control HDMI transmits a message stored in the third buffer 313, through section 33 of the HDMI device to a receiver 4 (S25).

The wireless transmitter 2, when taken through section 22 wireless "ACK"is sent from the wireless receiver 3, the processing section 214 HDMI connection determines that the transmission of A message is completed, and deletes A message stored in the third buffer 213 (S26). Section 214 of the processing HDMI connection B reads the message from the third buffer 213, and section 22 of the wireless communication transmits wireless, this message B wireless receiver 3. If it is determined that the wireless receiver 3 within a specified period not accepted "ACK" message B, the processing section 214 HDMI connection determines that there was a time limit is exceeded. For example, if section 215 of the control HDMI accepts the message B' of the same type as the message B, classified as type 3, from the source device 1 during the determination period exceeding the time limit (S27), then the message is of B, stored in the third buffer 213 (not deleted, so as not taken "ACK"), is overwritten by a new message B'.

Section 214 of the processing HDMI connection reads the message B' from the third buffer 213, and section 22 of the wireless transmission transmits wireless, this message B' wireless receiver 3.

As in the case of A message, the wireless receiver 3, section 314 processing HDMI connection takes through section 32 wireless message B'transmitted from the wireless transmitter 2, and section 314 of the communication processing HDMI stores the message B'received from the wireless transmitter 2, in the third buffer 313 and wireless image transmits "ACK" message B' wireless transmitter 2. Section 315 of the control HDMI transmits the message B'stored in the third buffer 313, through section 33 of the HDMI device to a receiver 4.

The wireless transmitter 2, when taken through section 22 wireless "ACK"is sent from the wireless receiver 3, the processing section 214 HDMI connection determines that the transmission of the message B' is completed, and deletes the message B'stored in the third buffer 213.

Despite the fact that when the update message B' there is a possibility of deleting messages B' due to ACK the message B, the data loss can be prevented through implementation options, such as: using information associated with the ACK, the button to provide the ability to define data which corresponds to ACK; or, a simpler solution, which consists in the separation of the queue area, pending the processing of the transfer, and the area pending ACK (area pending removal due to ACK after once processed transmission), and restriction of rewriting only area waiting to be processed transmission.

In the case of messages that are classified as type 3 message of the same type, not fully transferred, directly overwritten in contrast to type 2, and, therefore, do not wish to transfer old messages, thereby decreasing the amount of data.

In accordance with the present invention, as associated data, which are linked in the video/audio can be transmitted in different transmission modes depending on their characteristics in the environment of wireless transmission, having a narrow bandwidth and easily causing a transmission error, the amount of data that must be transferred is reduced. Even if there is a transmission error, loss of data, etc. in the associated data, the associated data can correctly be transmitted. Related data that require rapid transmission can be transmitted preferentially.

So how linked data can be transmitted through a wireless channel, as well as video and audio, there is no need to add another wireless AC is Ala to send the associated data. Consequently, there is no need to implement additional wireless signal through the antenna, amplifier section, signal processing, etc. can be achieved cost reductions.

Wireless transmission uses the wireless frequency band (band 5-GHz), available without having permission. The range of available frequencies governed by the law, and another wireless device (such as wireless LAN)that uses the same frequency band (band 5-GHz), arranged for communication by searching for unused frequency range (frequency channel)through which no communication occurs. In accordance with the method of the wireless AV transmission of the present invention, do not want to add to use the frequency band (frequency channel) and, consequently, accordingly increasing the range of frequencies available to another communication device, thereby increasing opportunities for communication.

EXPLANATION LETTER OR numerical NOTATION

1 - source device; 2 - wireless transmitter; 3 - wireless receiver; 4 - device-recipient; 11, 33 - sections HDMI output; 21, 31 - management section; 22, 32 section wireless communication; 23, 41 - section of an HDMI input; 211, 311 of the first buffer 212, 312 is a second buffer; 213, 313 - third buffer; 214, 314 - section processing HDMI connection and 215,315 - section control HDMI.

1. The wireless transmission system, comprising: a first wireless device connected to the display device; and a second communication device connected to the video output device, the wireless transmission system displays video and audio of the video display device through the wireless communication between the first wireless device and the second wireless device and the first wireless communication device and/or the second wireless communication device classifies the associated data that is associated with video and audio, depending on their characteristics, and transmits the wireless image related data in different transmission modes with respect to the corresponding classes.

2. The wireless transmission system according to claim 1, in which the first wireless communication device and/or the second wireless communication device includes buffers for each class of related data.

3. The wireless transmission system according to claim 1, in which the presence/absence of retransmission and the presence/absence of permutations of the order of transfer can vary between transmission modes.

4. The wireless transmission system according to claim 1, in which the first wireless communication device and/or the second wireless communication includes many ol the water transmission lines depending on the characteristics of the associated data, and the first wireless communication device and/or the second wireless communication device classifies the associated data for each of the wired transmission lines.

5. The wireless transmission system according to claim 4, in which the first wireless communication device and/or the second wireless communication device classifies many related data based on their header information, when a lot of associated data with different characteristics, are passed through one wire transmission line.

6. The wireless transmission system according to claim 4, in which the display device is connected via HDMI with the first wireless device and the video output device are connected through HDMI with the second wireless device,
many wired transmission line consists of a line TMDS line CEC, DDC line and the HPD line of the HDMI standard,
associated data includes DIP transmitted through the TMDS line, the message SES, is passed through line CEC, HDCP authentication message transmitted through the DDC line, and the signal hot plug passed through the HPD line, and classes are divided into the first type, including DIP, the second type, which includes the message CEC and HDCP authentication message, and the third type, which includes a signal hot plug.

7. The wireless system p is passing according to claim 6, in which in relation to the DIP, the second wireless communication device classifies the data to adjust picture quality or audio that change while watching/listening to video and audio, like the first type, and data, which are changed at the time of switching of the source output, as a third type.

8. The wireless transmission system according to claim 6, in which the transmission mode of the first type is a mode in which retransmission and the permutation of the order of transfer is not performed, the transmission mode of the second type is a mode in which the transmission will be repeated, while the permutation of the order of transfer is not executed, and the transfer mode of the third type is a mode that performs retransmission or rearrange the order of transmission, and mode to refresh linked data remaining in the buffer, until the state changes.



 

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13 cl, 1 dwg

FIELD: information technology.

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Broadcast receiver // 2467498

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21 cl, 22 dwg

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12 cl, 24 dwg

FIELD: information technology.

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16 cl, 11 dwg, 3 tbl

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10 cl, 2 dwg, 1 tbl

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5 cl, 1 dwg

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21 cl, 7 dwg

FIELD: information technology.

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34 cl, 21 dwg

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10 cl, 3 dwg

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9 cl, 2 dwg

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4 cl, 3 dwg

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2 cl, 10 dwg

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9 cl, 8 dwg

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6 cl, 3 dwg

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