CN1980370A - Wireless displaying device and wire-less displaying method - Google Patents
Wireless displaying device and wire-less displaying method Download PDFInfo
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- CN1980370A CN1980370A CNA2005101300095A CN200510130009A CN1980370A CN 1980370 A CN1980370 A CN 1980370A CN A2005101300095 A CNA2005101300095 A CN A2005101300095A CN 200510130009 A CN200510130009 A CN 200510130009A CN 1980370 A CN1980370 A CN 1980370A
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Abstract
The wireless display device includes main device end (MDE) and display device end (DDE). MDE possesses display adapter in use for receiving display info, and converting it to pixel info and display control info. DDE possesses display controller in use for receiving pixel info and display control info, and drives luminescence part based on the said info. MDE possesses wireless transmission process (WTP) unit in use for receiving pixel info and display control info sent from display adapter, and encodes the message of the received info, and sends out the encoded message. DDE also possesses WTP unit in use for receiving message sent from WTP unit at MDE, and decodes it to pixel info and display control signal, which is output to display controller at display end. The invention also discloses wireless display method. Comparing with prior art, the invention possesses advantages of lightening workload of CPU, and reducing cost.
Description
Technical field
The present invention relates to Radio Transmission Technology, relate in particular to a kind of wireless display.The present invention provides a kind of wireless display method simultaneously.
Background technology
At present, computer or other electronic equipments (set-top box STB, video compact disc VCD playback equipment, digital video disk DVD playback equipment, personal TV video tape recorder PVR) and display device (cathode-ray tube CRT or LCD LCD, projector, TV, HDTV (High-Definition Television)) mainly connect by cable.Connect for convenience, wireless Display Technique is also developing rapidly.Especially under the increasingly mature background of superelevation bandwidth wireless network UWB technology, the prospect of wireless Display Technique is more wide.
Current wireless Display Technique is mainly to grab the screen technology.Grabbing the screen technology is at computer or electronic equipment end, utilizes custom-designed software, existing content in the reading displayed memory cell, thus the current screen content displayed is intercepted and captured; Then, the content intercepted and captured is collapsed into after the screen compressed information with compression algorithm, utilizes wireless network protocol (WiFi, UWB etc.) to send this compressed information to display device in real time by CPU.The display device end carries out protocol analysis by the embedded computer module of special use, and the reduction of screen compressed information, and the Pixel Information that is comprised is offered the display device demonstration.
Should existing scheme have following defective:
1, it is big to take the computational resource of computer.This mainly is because under the screenshotss mode, central processing unit (CPU) CPU need do two work simultaneously, the one, carry out real-time decompress(ion), so that the playing audio-video content; The 2nd, CPU carries out and grabs the screen program, obtains video data from video card, compresses, and sends wireless display apparatus to by wireless network card.More than two work cpu resource is excessively taken, influence the processing speed of CPU, high quality graphic can't be shown in real time.
2, cost height.Adopt the screenshotss mode, main equipment end and display device end all need the strong CPU of computing capability to carry out encoding and decoding, so cost is higher.
Summary of the invention
At above-mentioned defective, the technical problem that the present invention solves is, provides to take the less wireless display of cpu resource, can better finish wireless Presentation Function, and cost is lower.
The wireless display that the present invention proposes comprises main equipment end, display device end; The main equipment end has display adapter, is used to receive display message, and is translated into Pixel Information and display control signal; The display device end has display controller, is used to receive Pixel Information and display control signal, and according to above-mentioned information-driven luminous component; This wireless display also comprises main equipment end wireless transmission processing unit, is used to receive the Pixel Information and the display control signal of described display adapter output, and it is carried out sending by wireless mode behind the message coding; Display device end wireless transmission processing unit is used to receive the message that described main equipment end wireless transmission processing unit sends by wireless mode, and is decoded into to Pixel Information and display control signal and outputs to described display device end display controller.
Preferably, described main equipment end has audio treatment unit, is used to receive acoustic information, and is translated into audio signal; Described main equipment end wireless transmission processing unit also receives described audio signal, and it is carried out sending by wireless mode behind the message coding; Described display device end wireless transmission processing unit also receives the audio wireless message that described main equipment end wireless transmission processing unit sends, and it is decoded as audio signal; Described display device end has audio frequency digital-to-analogue conversion and power amplifier unit, is used to receive decoded audio signal, and produces the drive signal that drives loud speaker.
Preferably, described main equipment end wireless transmission processing unit comprises the detection of main equipment end and linkage unit, main equipment end transmission control unit, main equipment end message codec unit, and main equipment end wireless network links layer, main equipment end wireless network physical layer; Described main equipment end is surveyed the wireless connections that are used to set up main equipment end and display device end with linkage unit; Described main equipment end transmission control unit is used for the control transmission quality: described main equipment end message codec unit is used for video pixel information and control signal or audio signal are carried out message coding; Described main equipment end wireless network links layer, main equipment end wireless network physical layer are used to receive the message through coding, and further encode, are modulated to wireless signal and send; Described display device end wireless transmission processing unit comprises the detection of display device end and linkage unit, display device end transmission control unit, display device end message codec unit, and display device end wireless network links layer, display device end wireless network physical layer; Described display device end wireless network physical layer receives the wireless signal that the main equipment end sends, and its decoding is sent to display device end wireless network links layer; Display device end wireless network links layer is used to receive the signal that display device end wireless network physical layer transmits, and will be sent to described display device end message codec unit after its decoding; Described display device end message codec unit is used to receive the signal through decoding that display device end wireless network links layer transmits, it further is decoded as Pixel Information, control signal or audio signal, and is sent to display controller or digital-to-analogue conversion and power amplifier unit; Described display device end is surveyed the wireless connections that are used to set up main equipment end and display device end with linkage unit; Described transmission control unit is used for the control transmission quality.
Preferably, described wireless network is superelevation bandwidth wireless network UWB.
Preferably, described main equipment end transmission control unit receives the display device parameter that display device end detection response message transmits, and according to above-mentioned parameter, and the display parameters that the user sets are determined transmission parameter and message coding form, and send this transmission parameter to main equipment end wireless network links layer, the signal modulation of control main equipment end wireless network physical layer; Simultaneously, transmission control unit sends the display device parameter to display adapter, and display adapter is determined the concrete parameter of row and field according to the display device parameter.
Preferably, described main equipment end transmission control unit is surveyed the strong and weak and packet loss result of signal that the display device end transmits, and calculates the distance and the interference of main equipment end and display device end, and adjusts the transmitting power of wireless network physical layer in view of the above.
Preferably, the message behind the described main equipment end message codec unit coding comprises at least: (1) display device identification information; (2) type of message information; (3) message length information; (4) video message data or voice message data.
Preferably, described video message data comprise at least: (1) field synchronization information; (2) go synchronizing information; (3) pixel cell sign; (4) pixel data.
Preferably, the placement of wherein said video message data various information is in proper order: after the field synchronization information, follow the included Pixel Information of all row in; After the row synchronizing information, follow all Pixel Information that comprise in the delegation.
Preferably, described main equipment end wireless transmission processing unit and display adapter become one, and display device end wireless transmission processing unit is integrated in the display device.
Preferably, the wireless biography of described main equipment end elm processing unit is connected with the computer display adapter by wireline interface, this main equipment end wireless transmission processing unit comprises AD conversion unit simultaneously, is used for the analog signal of computer display adapter output is converted into digital signal; Described display device end wireless transmission processing unit is connected with display device by wireline interface, this display device end wireless transmission processing unit comprises D/A conversion unit simultaneously, is used for the digital signal of display device end wireless transmission processing unit output is converted into analog signal.
Preferably, described main equipment end has a plurality of wireless transmission processing units and is used to send video information or audio/video information, and the display device end has a plurality of wireless transmission processing units accordingly, is used for receiver, video information or audio/video information; The main equipment end has scheduling unit, is used for described video information or audio/video information deblocking, and gives each main equipment end wireless transmission processing unit with the data allocations of piecemeal; The display device end has merge cells, and the data that are used for that each display device end wireless transmission processing unit is received merge formation complete video displaying contents and voice playing content.
The present invention discloses a kind of wireless display method simultaneously, comprises the steps: 131) main equipment end wireless transmission processing unit receives Pixel Information, the display control signal that display adapter produces, and carries out message coding; 132) main equipment end wireless transmission processing unit sends the current video message by wireless network; 133) display device end wireless transmission processing unit receives described video message by wireless network; 134) whether display device end wireless transmission processing unit checking message transmissions is correct; If correct, then enter 136); If incorrect, then enter step 135); 135) display device end wireless transmission processing unit sends and retransmits sign, and main equipment end wireless transmission processing unit resends video message according to this sign, returns 134); 136) display device end wireless transmission processing unit sends accurate indication to the main equipment end; 137) the display device end becomes Pixel Information and display control signal with the video message decoding that is received, and issues the indicative control unit of display device end; 138) return 131).
Preferably, described step 131) preceding, also comprise the step that main equipment end and display device end connect, specifically: 141) the main equipment end is surveyed with linkage unit and is obtained the display device identification information of setting; 142) the main equipment end is surveyed and linkage unit coding probe messages, sends this probe messages by the described wireless network links layer of main equipment end, wireless network physical layer, and described probe messages comprises the display device identification information; 143) the display device end is surveyed with linkage unit and is received the described probe messages that described main equipment end is surveyed and linkage unit sends by display device end wireless network physical layer, display device end wireless network links layer; 144) the display device end is surveyed with linkage unit display device identification information and the self-contained identification information that the probe messages that is received comprises is compared, if both unanimities then enter next step; 145) the display device end is surveyed and linkage unit coding detection response message, comprising information such as the technical parameter of display device, models, sends by display device end wireless network links layer, wireless network physical layer; 146) the main equipment end receives described detection response message by main equipment end wireless network links layer, main equipment end wireless network physical layer, and sends it to described main equipment end detection and linkage unit; 147) described main equipment end is surveyed with linkage unit and is obtained detection response message, and judgement main equipment end was set up with being connected of display device end, can enter step 131).
Preferably, described step 147) after, the main equipment end is surveyed with linkage unit information such as the technical parameter of the display device that comprises in the detection response message that is obtained, model is sent to main equipment end transmission control unit, this unit is according to information such as the display device technical parameter that is received, models, and the display parameters that the user sets are determined transmission parameter, and sending this transmission parameter to main equipment end wireless network links layer, main equipment end wireless network links layer is according to the signal modulation of this transmission parameter control main equipment end wireless network physical layer; The main equipment end is surveyed with linkage unit and also display device parameters such as the technical parameter of the display device that comprises in the detection response message that is obtained, model is sent to described main equipment end message codec unit, by determining the message coding form in view of the above in this unit; The main equipment end is surveyed with linkage unit and is also sent described display device parameter to display adapter, and display adapter determines that according to described display device parameter the quantity and the field information that comprise pixel in Pixel Information form, the delegation comprise capable quantity.
Preferably, described step 147) after, main equipment end transmission control unit calculates the distance and the interference of main equipment end and display device end, and adjusts the transmitting power of wireless network physical layer in view of the above according to the strong and weak and packet loss result of signal that display device in the process that connects transmits.
Preferably, described step 145) also comprise before: 161) display device end transmission control unit detects the integrity verification sign indicating number of probe messages, disposes display device end wireless network links layer parameter and display device end wireless network physical layer parameter in view of the above.
Preferably, described step 131) in, main equipment end wireless transmission processing unit receives the audio signal of main equipment end audio treatment unit output simultaneously, and it is carried out message coding; Described voice message carries out same processing with video message in subsequent step.
Preferably, in step 136) after, step 137) preceding, also comprise: 181) display device end message codec unit is judged type of message according to the type information in the received packet; If video message then enters 137), if voice message is then decoded, the voice data that produces is sent to audio frequency digital-to-analogue conversion of display device end and power amplifier unit.
Compared with prior art, the present invention has following advantage:
1,, makes computer CPU need not to carry out to grab the screen program and obtain display message, thereby alleviated the workload of CPU from showing memory cell because the Pixel Information and the display control signal that directly use main equipment end display adapter to produce carry out wireless transmission.
2, because Pixel Information, control signal that display adapter is produced are transmitted in good time, need not to compress, process such as decompression, do not need high performance CPU to participate at transmitting terminal and receiving terminal.
3, can avoid propagation delay time.This is owing to adopt this kind wireless display, the Pixel Information and the display control signal that can directly use display adapter to produce transmit in good time, after receiving terminal receives signal in good time, can be immediately with its decoding, be reduced to Pixel Information, control signal, and be used to drive the display device luminous component, owing to need not through storage pixel information and display control signal, and the process of compressing, decompressing, so propagation delay time shortens.
Description of drawings
Fig. 1 is basic principle figure of the present invention;
Fig. 2 is the composition frame chart of first embodiment of the invention;
Fig. 3 is the flow chart that first embodiment of the invention main equipment end and display device end are set up wireless connections;
Fig. 4 is the flow chart of first embodiment of the invention Data Transport Protocol;
Fig. 5 is the composition frame chart of second embodiment of the invention;
Fig. 6 is the composition frame chart of third embodiment of the invention.
Embodiment
Please referring to Fig. 1, this figure illustrates basic principle of the present invention.This illustrates the main equipment end is realized demonstration at the display device end by wireless network signals transmission.
As shown in the drawing, the display message of computer or electronic equipment 101 and acoustic information are converted into the wireless network message, be sent to the display device end by wireless network, and by of the wireless network message decoding of display device end with reception, final formation Pixel Information and display control signal driving display show corresponding information, and form audio digital signals driving loud speaker sounding.
As shown in the figure, computer or electronic equipment 101 send the display message of required demonstration to image controller 102; Image controller 102 produces corresponding Pixel Information and display control signal (as field signal, row signal) according to this image information; Above-mentioned Pixel Information and display control signal are sent to message process unit 104, after message process unit 104 is handled, be sent to wireless network links layer 105, further carry out message coding by it, message through wireless network links layer 105 coding is sent to wireless network physical layer 106, by modulating through signal behind its coding, become wireless signal, launch by wireless network at last.Wireless network adopts superelevation bandwidth wireless network UWB among the figure, and signal is launched by the radio frequency mode.
When acoustic information need be realized sound playing by the loud speaker of display device end, computer or electronic equipment 101 are sent to audio treatment unit 103 with acoustic information, form audio digital signals by audio treatment unit 103, and be sent to message process unit 104, adopt the mode identical to carry out message coding, finally send by wireless network physical layer 106 with above-mentioned vision signal.For audio signal is distinguished mutually with vision signal, can when message coding, add identifying information.
For computer or electronic equipment 101 ends can be discerned mutually with corresponding display device end, in order to avoid the information misinformation, display device has identification information, and this identification information can be specific code, or key information.By computer or electronic equipment 101 described display device identification information is sent to message process unit 104, message process unit 104 is according to this display device identification information coding and send probe messages, and, realize and being connected of display device according to the detection response message of display device end.
Described display device end has and the opposite processing procedure of above-mentioned main equipment end, finally is that display message is shown on display screen, and acoustic information is passed through loudspeaker plays.
As shown in the figure, the wireless signal that sends by wireless network physical layer 107 (among the figure be example with superelevation bandwidth wireless network UWB) receiving computer or electronic equipment end of display device end.This wireless network physical layer 107 receives described wireless signal, through the signal demodulation, and decoding, be sent to UWB link layer 108.The signal of 108 pairs of receptions of UWB link layer is sent to message process unit 109 after further carrying out the message decoding.This message process unit 109 comprises to be surveyed and linkage unit, transmission control unit, message codec unit etc., described message is through after decoding, become Pixel Information and display control signal, be sent to display controller 110,, show content corresponding by the demonstration luminous component of display controller 110 according to above-mentioned Pixel Information and display control signal driving display device.When described message transmitted acoustic information simultaneously, this message process unit 109 also will be converted into the acoustic information in the message audio digital signals and be sent to audio frequency power amplifier and D/A conversion unit 112, is sounded by this unit drives loud speaker 113.
In order to realize the identification of display device end and main equipment end, message process unit 109 has the display device identification information, this message process unit can compare the display device identification information that comprises in this display device identification information and the message that is received, when both are consistent, judge that then the message received is that main equipment end by correspondence sends, and this message is handled.
Following examples describe specific implementation process of the present invention in detail.
Please, be the composition frame chart of first embodiment of the invention referring to Fig. 2.
As shown in the figure, this wireless display comprises main equipment end display unit 21, display device end display unit 22.
Described main equipment end display unit 21 receives the display message data that ancillary equipment interconnection PCI transmit, and is translated into wireless shows signal and outwards launches.
Described display apparatus end display unit 22 receives described wireless shows signal, and shows related content according to this signal driving display.
Described main equipment end display unit 21 comprises display adapter 211, audio treatment unit 212, main equipment end wireless transmission processing unit 213.This main equipment end display unit 21 is that integrated audio processing unit 212 and main equipment end wireless transmission processing unit 213 formed on the basis of traditional display adapter.
Described display adapter 211 comprises graphics processing unit (GPU) 2111, display-memory (VRAM) 2112, image controller 2113.
Described graphics processing unit 2111 receives the image information that pci bus transmits, and it is carried out analyzing and processing, forms Pixel Information.
Described display-memory 2112 receives the Pixel Information that described graphics processing unit 2111 transmits, and it is stored by certain form.
Described image controller 2113 reads the Pixel Information of described display-memory 2112 storages, and adds control signal, comprises field signal, row signal etc., and with above-mentioned signal output.
Described audio treatment unit 212 is used to receive the voice signal that pci bus transmits, and is translated into audio signal output.
The wireless processing transmission unit 213 of described main equipment end is used to receive the Pixel Information and the control signal of described display adapter unit 211 outputs, and the audio signal of audio treatment unit 212 outputs.And be translated into wireless signal output.
Described main equipment end wireless processing unit 213 comprises to be surveyed and linkage unit 2131, transmission control unit 2132, audio frequency and video message codec unit 2133, and superelevation bandwidth wireless network (UWB) link layer 2134, superelevation bandwidth wireless network (UWB) physical layer 2135.
Described detection and linkage unit 2131 are used to set up the wireless connections of main equipment end and display device end.Whether this unit is at first surveyed display device and is existed, and the technical parameter that obtains display device, the wireless connections of finally setting up main equipment end and display device end.
The step of this detection and linkage unit 2131 execution above-mentioned functions as shown in Figure 3.
Step S301, the main equipment end is surveyed with linkage unit 2131 and is obtained the display device identification information.Described display device identification information is specific code or key information, is used to identify the wireless display apparatus that matches with computer.This identification information configured in advance when this detection and linkage unit 2131 are started working, can obtain this information in display device detection of calculating and linkage unit 2131.
Step S302, the main equipment end is surveyed and linkage unit 2131 coding probe messages, wherein comprise the display device identification information, send link layer 2134 to, and be converted into suitable form by link layer 2134, send physical layer 2135 to, finally send by superelevation bandwidth wireless network (UWB) by physical layer 2135.
After step S303, display device end receive described probe messages by UWB physical layer 2215, be sent to display device end UWB link layer 2214, be sent to the display device end after handling by it and survey and linkage unit 2211;
Step S304, the display device end is surveyed with linkage unit 2211 and is read the identification information that is comprised in the probe messages that receives, and the equipment identification information of this identification information with oneself compared, and when both are consistent, then enters next step;
Step S305, the display device end is surveyed with linkage unit 2211 codings and is formed detection response message, technical parameter, model comprising display device, send display device end UWB link layer 2214 to, and further carry out message coding by it, be sent to display device end UWB physical layer 2215, send by superelevation bandwidth wireless network (UWB) by it.
Step S306, the main equipment end receives described detection response message by described main equipment end UWB link layer, UWB physical layer, and sends it to described main equipment end detection and linkage unit 2131.
Step S307, the main equipment end is surveyed the detection response message that reads the described display device that transmits by UWB with linkage unit 2131, and obtain display device parameters such as the display device technical parameter that comprises in this message, model, and above-mentioned display device parameter offered display adapter 211, main equipment end transmission control unit 2132 and main equipment end message codec unit 2133, so that carry out correct message transmission.
Described transmission control unit 2132 is carried out following two work:
(1) supports form according to the picture quality resolution parameter of active user's setting and by display device model, pixel that described detection and linkage unit 2131 obtain, determine transmission parameter: bandwidth or speed, and give UWB link layer 2134, thereby the signal modulation of control UWB physical layer 2135 with the transmission parameter of determining; Simultaneously also send display device parameters such as the resolution of the technical parameter of display device such as display device, model to display adapter, so that it determines the number of pixels that delegation comprises, a line number that comprises;
(2) survey wireless signal transmission power and the packet loss that display device sends, and according to distance or interference between result of that probe calculating main equipment end and the display device end, calculate the value that obtains according to this, to UWB link layer 2134 sending power consumption parameters, thus the signal transmission power of adjustment UWB physical layer 2135.Wherein, the detection method of signal power can be to check packet loss, message transmissions integrality.
The message coding that described audio frequency and video message codec unit 2133 is used for voice data, and the message coding of video pixel information and control signal are so that the transmission foregoing.Message behind the coding comprises following content at least:
(1) display device identification information; This information makes display device can confirm that the transmitting information wirelessly that receives sends to oneself.
(2) type of message information, this information are mainly used in distinguishes voice message, video message, so that the display device end is handled accordingly.This information also can be used for distinguishing other type of message.
(3) message length information.
(4) concrete audio frequency and video message data.
(5) authentication of message sign indicating number
Described video message data comprise at least:
(1) field synchronization information;
(2) go synchronizing information;
(3) pixel cell sign;
(4) pixel data;
Wherein the placement of various information order can be: after the row synchronizing information, follow all Pixel Information that comprise in the delegation; After the field synchronization information, follow the included Pixel Information of all row in.Comprising under the situation of voice data, can be after one Pixel Information, immediately following this place corresponding audio information.
Above-mentioned audio frequency and video message coding is sent to described UWB link layer 2134, and 2135 modulation of control UWB physical layer send.
Described display device end display unit 22 comprises display device end wireless transmission processing unit 221, display controller 222, digital-to-analogue conversion and audio power amplifier unit 223, shows luminous component 224, loud speaker 225.
Institute reaches display device end wireless transmission processing unit 221 and comprises: survey and linkage unit 2211, transmission control unit 2212, audio frequency and video message codec unit 2213 and superelevation bandwidth wireless network (UWB) link layer 2214, superelevation bandwidth wireless network (UWB) physical layer 2215.The function of above-mentioned each unit is corresponding with each unit of the wireless processing transmission unit of described main equipment end.
Described display device end UWB physical layer 2215 receives described probe messages and the audio frequency and video message that the main equipment end sends by superelevation bandwidth wireless network (UWB), and with described message decoding back output; This UWB physical layer receives detection response message or other response message that display device end UWB link layer sends simultaneously, after its coding, modulation, launches in the radio frequency mode.
Described display device end UWB link layer 2214 receives probe messages and the audio frequency and video message that display device end UWB physical layer 2215 transmits, and with its further decoding back output; This display device end UWB link layer 2214 receives detection response message and other response message simultaneously, and it further is sent to display device end UWB physical layer behind the coding.
Described detection and linkage unit 2211 are used to realize and being connected of main equipment end.This is surveyed with linkage unit 2211 and receives the detectable signal that described display device end UWB link layer 2214 transmits, and the identification information that comprises in this probe messages and the identification information of this display device compared, when if both are consistent, then generate detection response message, send display device end UWB link layer 2214 to, finally send by superelevation bandwidth wireless network (UWB).Described detection response message comprises technical parameter, the model coding of display device.
Described transmission control unit 2212 is used to detect the integrity verification sign indicating number of probe messages, and disposes UWB link layer 2214 and UWB physical layer 2215 parameters in view of the above.In wireless procedure for displaying,, adjust link layer and physical layer parameter according to audio frequency and video mass parameter and receiving-transmitting sides signal power.This transmission control unit can also verify whether message is correct according to message content, if correct, then produces accurate indication, sends by wireless network; If incorrect, then produce retransmission flag, send by wireless network.
Described audio frequency and video message codec unit 2213 receives the audio frequency and video message from UWB link layer 2214, and reads the type of message information that comprises in this message, judges the message kind according to the type information.If video message, then with message decoding, with the Pixel Information that produces, and display control signal such as field synchronization, row be synchronous, send indicative control unit 222 to.If voice message then with the voice message decoding, sends to audio frequency digital-to-analogue conversion and power amplifier unit 223 with the voice data that produces.
Described display controller 222 is used to receive control signal and the Pixel Information that the wireless processing transmission unit 221 of described display device end transmits, and is translated into suitable display drive signals, drives described demonstration luminous component 224 and shows.
Described demonstration luminous component 224 is used to receive the display drive signals that described display controller 222 sends, and shows according to this signal.
Described digital-to-analogue conversion and audio power amplifier unit 223 are used to receive the audio signal of wireless processing transmission unit 221 outputs of described display device end, and this signal is converted into analog signal from digital signal, and being used to drive audio frequency power amplifier, audio frequency power amplifier and then driving loud speaker 225 are sounded.
Above-mentioned wireless transmission process need be followed corresponding Data Transport Protocol and carry out.This Data Transport Protocol is formulated according to the composition situation of purpose that realizes wireless demonstration and described wireless transmission unit.
Described Data Transport Protocol comprises following processing procedure at least: device discovery and detection, and wireless logical transport channel parameters adjustment, the audio frequency and video message transmits and receives, and channel service quality is handled.Its step is as shown in Figure 4:
Step S401, main equipment end (transmit leg) connects with display device end (recipient).At first, send probe messages by the main equipment end, this probe messages includes the characteristic information of display device; After the display device termination is received this probe messages, the display device characteristic information that wherein comprises and the characteristic information of self are compared, if be consistent, then send detection response message to the main equipment end, the main equipment termination is received this detection response message, knows the existence of display device, enters next step.
Step S402, the main equipment end is determined transmission parameter according to display device parameters such as the display device technical parameter that comprises in the detection response message, models; According to audio frequency and video mass parameter and receiving-transmitting sides signal power, receiving-transmitting sides is adjusted link layer and physical layer transmitting power, and the display device end disposes its wireless network parameter according to the integrity verification sign indicating number of probe messages.
At first, the main equipment end is surveyed with linkage unit 2131 information such as the technical parameter of the display device that comprises in the detection response message that is obtained, model is sent to main equipment end transmission control unit 2132, this unit is according to information such as the display device technical parameter that is received, models, and the display parameters that the user sets are determined transmission parameter, and sending this transmission parameter to main equipment end wireless network links layer 2134, main equipment end wireless network links layer 2134 is according to the signal modulation of this transmission parameter control main equipment end wireless network physical layer 2135; The main equipment end is surveyed with linkage unit 2131 and also display device parameters such as the technical parameter of the display device that comprises in the detection response message that is obtained, model is sent to described main equipment end message codec unit 2133, by determining the message coding form in view of the above in this unit; The main equipment end is surveyed with linkage unit 2131 and is also sent described display device parameter to display adapter 211, and display adapter determines that according to described display device parameter the quantity and the field information that comprise pixel in Pixel Information form, the delegation comprise capable quantity.
Find to find out the transmission quality of signals, and adjust described transmitting power, transmission rate parameter in view of the above in the display device process in above-mentioned detection.Above-mentioned steps is finished by the transmission control unit of receiving-transmitting sides.Comprising, main equipment end transmission control unit 2132 calculates the distance and the interference of main equipment end and display device end, and adjusts the transmitting power of wireless network physical layer in view of the above according to surveying the strong and weak and packet loss result of signal that display device transmits in the discovery procedure.And display device end transmission control unit 2212 detects the integrity verification sign indicating number of probe messages, disposes the parameter of display device end wireless network links layer 2214 and the parameter of display device end wireless network physical layer 2215 in view of the above.
Step S403, the main equipment end sends current audio frequency and video message by wireless network.The forming process of this audio frequency and video message as previously mentioned.
Step S404, the display device termination is received described audio frequency and video message.The receiving course of this audio frequency and video message as previously mentioned.
Step S405, whether display device end checking authentication of message sign indicating number is correct, if correct, then enters step S406; Otherwise change step S407.This process is finished by recipient's (display device end) transmission control unit 2212.
Step S406, display device end send accurate indication to the main equipment end
Step S407, the display device end is with the message decoding that is received, and according to the type information that it comprised, judgement is voice message or video message.If video message then enters step S408; If voice message then enters step S409.
Step S408, the display device end becomes Pixel Information and display control signal with the video message decoding that is received, and issues the display controller 222 of display device end; Produce drive signal by display controller 222, drive demonstration luminous component 224 and show.Return step S403.
Step S409, the display device end sends to audio frequency digital-to-analogue conversion of display device end and power amplifier unit 223 with the voice message decoding that is received with the voice data that produces, and produces drive loud speaker sounding by it.Return step S403.
Step S410, display device end send and retransmit sign.
Step S411, the main equipment end resends the audio frequency and video message according to retransmitting sign, changes step S404.
Please, be the composition frame chart of second embodiment of the invention referring to Fig. 5.
As shown in the figure, at the main equipment end, computer display card 51 connects main equipment end wireless transmission processing unit 53 by wired audio-video interface 52 (specifically being the VGA/DVI interface).This wireless transmission processing unit 53 is hardware modules that are independent of computer display card, can be connected with computer display card by wired audio-video interface 52 easily, the video display signal that its receiving computer video card 51 transmits, and be translated into the UWB message by the transmission of UWB network.Because computer display card is analog signals by the signal of described interface VGA/DVI 52 outputs, therefore, before carrying out wireless transmission, need to carry out analog-to-digital conversion by analog-to-digital conversion subelement 531, after making analog signal conversion be digital signal, handle subelement 532 by wireless transmission and handle and send, internal structure and function that this wireless transmission is handled subelement 532 are identical with the main equipment end wireless transmission processing unit of first embodiment.
At the display device end, wireless transmission processing unit 54 connects display device 56 by wired audio-video interface VGA/DVI 55.Described wireless transmission processing unit 54 receives the message that described UWB network transmits, and will be converted into Pixel Information, display control signal after this message decoding, be sent to display device 56 by described wired audio-video interface VGA/DVI 55, drive display device 56 and show.Described wireless transmission processing unit 54 is an independently hardware module equally, can be connected with the display end easily by described wired audio-video interface.Because the semaphore request by described interface VGA/DVI 55 outputs is an analog signal, therefore, be integrated with digital-to-analogue conversion subelement 542 in the wireless transmission processing unit 54, this subelement receives the digital video signal that wireless transmission is handled subelement 541 outputs, after being converted into analog signal, output to display device by described wired audio-video interface VGA/DVI 55, drive display device and show.The structure that described wireless transmission is handled subelement 541 is identical with the display device end wireless transmission processing unit of the function and first embodiment.
The difference of present embodiment and above-mentioned first embodiment is, uses and finishes wireless transmission with the independently wireless processing transmission unit of computer and display device wired connection respectively, needn't revise existing computer display card and display device.
Please, be the composition frame chart of third embodiment of the invention referring to Fig. 6.
It is bigger that this embodiment is used for the display message amount that needs such as high definition demonstration will transmit.Use the situation that wireless transmission unit can't realize.
As shown in the figure, the computer phoneme video processing unit connects a plurality of audio/video information wireless transmission processing units (among the figure be example with 3) by scheduling unit.Accordingly, the display device end is corresponding to possess same number of audio/video information wireless transmission processing unit (among the figure be example with 3), and connects the audio frequency and video control unit by merge cells.
Above-mentioned each wireless transmission processing unit occupies different channels or frequency bandwidth in physical layer, thereby is worked simultaneously in a plurality of unit, enlarges the bandwidth and the speed of whole wireless transmission.The scheduling unit of main equipment end is used for the audio, video data piecemeal, and the audio, video data of piecemeal is distributed to each audio/video information wireless transmission processing unit, by these audio/video information wireless transmission processing unit for parallel transmission.At the display device end, merge by the information of merge cells, and, form current complete audio frequency and video demonstration, play content its combination reduction to each audio/video information wireless transmission processing unit reception of display device end.
The technical scheme of present embodiment can make wireless transmission unit have enough bandwidth, satisfies the bigger occasion of amount of image information.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (19)
1, a kind of wireless display comprises main equipment end, display device end; The main equipment end has display adapter, is used to receive display message, and is translated into Pixel Information and display control signal; The display device end has display controller, is used to receive Pixel Information and display control signal, and according to above-mentioned information-driven luminous component; It is characterized in that, also comprise main equipment end wireless transmission processing unit, be used to receive the Pixel Information and the display control signal of described display adapter output, and it is carried out sending by wireless mode behind the message coding; Display device end wireless transmission processing unit is used to receive the message that described main equipment end wireless transmission processing unit sends by wireless mode, and is decoded into to Pixel Information and display control signal and outputs to described display device end display controller.
2, wireless display according to claim 1 is characterized in that, described main equipment end has audio treatment unit, is used to receive acoustic information, and is translated into audio signal; Described main equipment end wireless transmission processing unit also receives described audio signal, and it is carried out sending by wireless mode behind the message coding; Described display device end wireless transmission processing unit also receives the audio wireless message that described main equipment end wireless transmission processing unit sends, and it is decoded as audio signal; Described display device end has audio frequency digital-to-analogue conversion and power amplifier unit, is used to receive decoded audio signal, and produces the drive signal that drives loud speaker.
3, device according to claim 1 and 2, it is characterized in that, described main equipment end wireless transmission processing unit comprises the detection of main equipment end and linkage unit, main equipment end transmission control unit, main equipment end message codec unit, and main equipment end wireless network links layer, main equipment end wireless network physical layer; Described main equipment end is surveyed the wireless connections that are used to set up main equipment end and display device end with linkage unit; Described main equipment end transmission control unit is used for the control transmission quality: described main equipment end message codec unit is used for video pixel information and control signal or audio signal are carried out message coding; Described main equipment end wireless network links layer, main equipment end wireless network physical layer are used to receive the message through coding, and further encode, are modulated to wireless signal and send; Described display device end wireless transmission processing unit comprises the detection of display device end and linkage unit, display device end transmission control unit, display device end message codec unit, and display device end wireless network links layer, display device end wireless network physical layer; Described display device end wireless network physical layer receives the wireless signal that the main equipment end sends, and its decoding is sent to display device end wireless network links layer; Display device end wireless network links layer is used to receive the signal that display device end wireless network physical layer transmits, and will be sent to described display device end message codec unit after its decoding; Described display device end message codec unit is used to receive the signal through decoding that display device end wireless network links layer transmits, it further is decoded as Pixel Information, control signal or audio signal, and is sent to display controller or digital-to-analogue conversion and power amplifier unit; Described display device end is surveyed the wireless connections that are used to set up main equipment end and display device end with linkage unit; Described transmission control unit is used for the control transmission quality.
4, device according to claim 3 is characterized in that, described wireless network is superelevation bandwidth wireless network UWB.
5, device according to claim 3, it is characterized in that, described main equipment end transmission control unit receives the display device parameter that display device end detection response message transmits, and according to above-mentioned parameter, and the display parameters that the user sets are determined transmission parameter and message coding form, and send this transmission parameter to main equipment end wireless network links layer, the signal modulation of control main equipment end wireless network physical layer; Simultaneously, transmission control unit sends the display device parameter to display adapter, and display adapter is determined the concrete parameter of row and field according to the display device parameter.
6, device according to claim 3, it is characterized in that, described main equipment end transmission control unit is surveyed the strong and weak and packet loss result of signal that the display device end transmits, and calculates the distance and the interference of main equipment end and display device end, and adjusts the transmitting power of wireless network physical layer in view of the above.
7, device according to claim 3 is characterized in that, the message behind the described main equipment end message codec unit coding comprises at least: (1) display device identification information; (2) type of message information; (3) message length information; (4) video message data or voice message data.
8, device according to claim 7 is characterized in that, described video message data comprise at least: (1) field synchronization information; (2) go synchronizing information; (3) pixel cell sign; (4) pixel data.
9, device according to claim 8 is characterized in that, the placement of wherein said video message data various information is in proper order: after the field synchronization information, follow the included Pixel Information of all row in; After the row synchronizing information, follow all Pixel Information that comprise in the delegation.
10, device according to claim 1 is characterized in that, described main equipment end wireless transmission processing unit and display adapter become one, and display device end wireless transmission processing unit is integrated in the display device.
11, device according to claim 1, it is characterized in that, described main equipment end wireless transmission processing unit is connected with the computer display adapter by wireline interface, this main equipment end wireless transmission processing unit comprises AD conversion unit simultaneously, is used for the analog signal of computer display adapter output is converted into digital signal; Described display device end wireless transmission processing unit is connected with display device by wireline interface, this display device end wireless transmission processing unit comprises D/A conversion unit simultaneously, is used for the digital signal of display device end wireless transmission processing unit output is converted into analog signal.
12, device according to claim 1 and 2, it is characterized in that, described main equipment end has a plurality of wireless transmission processing units and is used to send video information or audio/video information, and the display device end has a plurality of wireless transmission processing units accordingly, is used for receiver, video information or audio/video information; The main equipment end has scheduling unit, is used for described video information or audio/video information deblocking, and gives each main equipment end wireless transmission processing unit with the data allocations of piecemeal; The display device end has merge cells, and the data that are used for that each display device end wireless transmission processing unit is received merge formation complete video displaying contents and voice playing content.
13, a kind of wireless display method is characterized in that, comprises the steps: 131) main equipment end wireless transmission processing unit receives Pixel Information, the display control signal that display adapter produces, and carries out message coding; 132) main equipment end wireless transmission processing unit sends the current video message by wireless network; 133) display device end wireless transmission processing unit receives described video message by wireless network; 134) whether display device end wireless transmission processing unit checking message transmissions is correct; If correct, then enter 136); If incorrect, then enter step 135); 135) display device end wireless transmission processing unit sends and retransmits sign, and main equipment end wireless transmission processing unit resends video message according to this sign, returns 134); 136) display device end wireless transmission processing unit sends accurate indication to the main equipment end; 137) the display device end becomes Pixel Information and display control signal with the video message decoding that is received, and issues the indicative control unit of display device end; 138) return 131).
14, method according to claim 13 is characterized in that, described step 131) preceding, also comprise the step that main equipment end and display device end connect, specifically: 141) the main equipment end is surveyed with linkage unit and is obtained the display device identification information of setting; 142) the main equipment end is surveyed and linkage unit coding probe messages, sends this probe messages by the described wireless network links layer of main equipment end, wireless network physical layer, and described probe messages comprises the display device identification information; 143) the display device end is surveyed with linkage unit and is received the described probe messages that described main equipment end is surveyed and linkage unit sends by display device end wireless network physical layer, display device end wireless network links layer; 144) the display device end is surveyed with linkage unit display device identification information and the self-contained identification information that the probe messages that is received comprises is compared, if both unanimities then enter next step; 145) the display device end is surveyed and linkage unit coding detection response message, comprising information such as the technical parameter of display device, models, sends by display device end wireless network links layer, wireless network physical layer; 146) the main equipment end receives described detection response message by main equipment end wireless network links layer, main equipment end wireless network physical layer, and sends it to described main equipment end detection and linkage unit; 147) described main equipment end is surveyed with linkage unit and is obtained detection response message, and judgement main equipment end was set up with being connected of display device end, can enter step 131).
15, method according to claim 14, it is characterized in that, described step 147) after, the main equipment end is surveyed and the technical parameter of linkage unit with the display device that comprises in the detection response message that is obtained, information such as model are sent to main equipment end transmission control unit, this unit is according to the display device technical parameter that is received, information such as model, and the display parameters that the user sets are determined transmission parameter, and sending this transmission parameter to main equipment end wireless network links layer, main equipment end wireless network links layer is according to the signal modulation of this transmission parameter control main equipment end wireless network physical layer; The main equipment end is surveyed with linkage unit and also display device parameters such as the technical parameter of the display device that comprises in the detection response message that is obtained, model is sent to described main equipment end message codec unit, by determining the message coding form in view of the above in this unit; The main equipment end is surveyed with linkage unit and is also sent described display device parameter to display adapter, and display adapter determines that according to described display device parameter the quantity and the field information that comprise pixel in Pixel Information form, the delegation comprise capable quantity.
16, method according to claim 14, it is characterized in that, described step 147) after, strong and weak and the packet loss result of signal that main equipment end transmission control unit transmits according to display device in the process that connects, calculate the distance and the interference of main equipment end and display device end, and adjust the transmitting power of wireless network physical layer in view of the above.
17, method according to claim 14, it is characterized in that, described step 145) also comprise before: 161) display device end transmission control unit detects the integrity verification sign indicating number of probe messages, disposes display device end wireless network links layer parameter and display device end wireless network physical layer parameter in view of the above.
18, according to each described method of claim 13 to 17, it is characterized in that described step 131) in, main equipment end wireless transmission processing unit receives the audio signal of main equipment end audio treatment unit output simultaneously, and it is carried out message coding; Described voice message carries out same processing with video message in subsequent step.
19, method according to claim 18 is characterized in that, in step 136) after, step 137) preceding, also comprise: 181) display device end message codec unit is judged type of message according to the type information in the received packet; If video message then enters 137), if voice message is then decoded, the voice data that produces is sent to audio frequency digital-to-analogue conversion of display device end and power amplifier unit.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510130009A CN100591117C (en) | 2005-12-05 | 2005-12-05 | Wireless displaying device and wire-less displaying method |
| GB0810208A GB2448429B (en) | 2005-12-05 | 2006-12-05 | Wireless display system and method thereof |
| US12/096,002 US8213858B2 (en) | 2005-12-05 | 2006-12-05 | Wireless display system and method thereof |
| DE112006003342.5T DE112006003342B4 (en) | 2005-12-05 | 2006-12-05 | Wireless display system and method therefor |
| JP2008543634A JP2009518902A (en) | 2005-12-05 | 2006-12-05 | Wireless display system and method |
| PCT/CN2006/003283 WO2007065350A1 (en) | 2005-12-05 | 2006-12-05 | A wireless display system and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510130009A CN100591117C (en) | 2005-12-05 | 2005-12-05 | Wireless displaying device and wire-less displaying method |
Publications (2)
| Publication Number | Publication Date |
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| CN1980370A true CN1980370A (en) | 2007-06-13 |
| CN100591117C CN100591117C (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200510130009A Expired - Fee Related CN100591117C (en) | 2005-12-05 | 2005-12-05 | Wireless displaying device and wire-less displaying method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176307A (en) * | 2011-03-23 | 2011-09-07 | 冠捷显示科技（厦门）有限公司 | Novel display system |
| CN108259910A (en) * | 2018-02-09 | 2018-07-06 | 上海小蚁科技有限公司 | Compression method and device, storage medium, the computing device of video data |
| CN109388362A (en) * | 2018-10-09 | 2019-02-26 | 中天智领（北京）科技有限公司 | Large screen control method and system |
-
2005
- 2005-12-05 CN CN200510130009A patent/CN100591117C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176307A (en) * | 2011-03-23 | 2011-09-07 | 冠捷显示科技（厦门）有限公司 | Novel display system |
| CN108259910A (en) * | 2018-02-09 | 2018-07-06 | 上海小蚁科技有限公司 | Compression method and device, storage medium, the computing device of video data |
| CN109388362A (en) * | 2018-10-09 | 2019-02-26 | 中天智领（北京）科技有限公司 | Large screen control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100591117C (en) | 2010-02-17 |
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