WO2018090721A1 - Usb有线传屏的方法及装置 - Google Patents

Usb有线传屏的方法及装置 Download PDF

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Publication number
WO2018090721A1
WO2018090721A1 PCT/CN2017/103468 CN2017103468W WO2018090721A1 WO 2018090721 A1 WO2018090721 A1 WO 2018090721A1 CN 2017103468 W CN2017103468 W CN 2017103468W WO 2018090721 A1 WO2018090721 A1 WO 2018090721A1
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WIPO (PCT)
Prior art keywords
usb
port
usb interface
communication protocol
audio
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PCT/CN2017/103468
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English (en)
French (fr)
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贺欣
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广州视源电子科技股份有限公司
广州视睿电子科技有限公司
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Publication of WO2018090721A1 publication Critical patent/WO2018090721A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394

Definitions

  • the present invention relates to the field of data transmission technologies, and in particular, to a method and apparatus for USB cable transmission.
  • the current implementation of the screen is as shown in FIG. 1 , the display device is connected to the display source PC and the display terminal respectively, and the display source PC intercepts the screen page and the sound data by intercepting the screen page and the sound data of the system.
  • the screen is sent to the display terminal through the screen device, and the display terminal displays and plays the screen and sound sent by the screen device to achieve the purpose of the screen.
  • the sound In order to intercept the sound, the sound needs to be output on the PC side, so during the screen transmission, the display source PC and the display terminal will emit sound through the respective power amplifiers; however, when the display source PC and the display terminal are in the same room, this case There will be mutual interference. Therefore, in many cases, it is chosen to turn off the sound and only perform the screen of the display screen, but it is difficult to achieve the desired effect.
  • the method and device for USB wired screen provided by the embodiment of the present invention can overcome the problem that the display source device and the display terminal simultaneously emit sound.
  • An aspect of the present invention provides a method for USB cable transmission, including:
  • the universal drive providing universal communication between the first device and the standard USB device a communication protocol, the communication protocol port at least comprising: a port for transmitting audio and video data and a port of an analog virtual sound card;
  • the first USB interface has information from the first device, detecting a communication protocol port that transmits the information, and if it is a port for transmitting audio and video data, identifying the information as audio and video data; and the audio and video data Forwarding to the second device by using the second USB interface of the local end, instructing the second device to play the corresponding audio and video after receiving the audio and video data.
  • Another aspect of the present invention provides a method for USB cable transmission, including:
  • the virtual sound card is not connected to any power amplifier device;
  • Intercepting the picture and audio played by the first device transmitting the intercepted audio and video data to the first USB interface of the USB device through the USB interface of the first device.
  • Another aspect of the present invention provides an apparatus for USB cable transmission, including:
  • a port simulation module configured to provide, by the first USB interface of the local end, a plurality of communication protocol ports, wherein the communication protocol port is recognized by a universal drive of the first device, where the universal drive provides the first device and the standard USB a universal communication protocol for communication between devices, the communication protocol port including at least: a port for transmitting audio and video data and a port for a virtual sound card;
  • connection establishing module configured to establish, by using the communication protocol port, the first USB interface, a USB communication connection between the local device and the first device; and indicating, by the port of the virtual sound card, the first device to be a system sound thereof Switching to the virtual sound card simulated by the local end, the virtual sound card is not connected to any power amplifier device;
  • the audio and video data forwarding module is configured to detect that the first USB interface has information from the first device, and detects a communication protocol port that transmits the information. If the port is used for transmitting audio and video data, the information is recognized as audio and video. Transmitting the audio and video data to the second device through the second USB interface of the local end, instructing the second device to play the corresponding audio and video after receiving the audio and video data.
  • Another aspect of the present invention provides an apparatus for USB cable transmission, including:
  • a USB identification module configured to identify, by a pre-installed universal driver, a communication protocol port provided by a USB device that accesses a first device USB interface;
  • the universal driver provides a universal communication protocol for communication between the first device and the standard USB device,
  • the communication protocol port includes at least a port for transmitting audio and video data and a port of a virtual sound card;
  • the USB device is provided with a first USB interface, and the USB device accesses the first device USB through the first USB interface An interface, and providing, by the first USB interface, a plurality of communication protocol ports that are identifiable by the universal drive of the first device;
  • a sound switching module configured to switch a system sound of the first device to a virtual sound card simulated by the USB device by using a port of the recognized virtual sound card, where the virtual sound card is not connected to any power amplifier device;
  • An audio and video intercepting module configured to intercept a picture and audio played by the first device
  • an audio and video sending module configured to send the intercepted audio and video data to the first USB interface of the USB device through a USB interface of the first device.
  • a virtual sound card is simulated by the screen device, and after the screen device is connected to the display source device USB, the system sound of the display source device is switched to the virtual sound card simulated by the screen device; and the intercepted display is simultaneously displayed.
  • the audio and video data of the source device is forwarded to the corresponding display device through the USB interface of the screen device. Therefore, when the display source device side no longer plays the sound through the power amplifier, the problem that the display source device and the display device simultaneously emit sound interferes when the screen involving the sound is overcome.
  • FIG. 1 is a schematic diagram of a system environment for implementing a method for USB cable transmission of the present invention
  • FIG. 2 is a schematic flowchart of a method for USB wired screen transmission according to an embodiment
  • FIG. 5 is a detailed flowchart of a method for displaying a USB cable screen of a source device according to a second embodiment
  • FIG. 6 is a schematic flowchart of a method for USB cable transmission of a third embodiment
  • FIG. 7 is a detailed flowchart of a method for USB wired transmission of a display device of a third embodiment
  • FIG. 8 is a schematic structural diagram of an apparatus for USB cable transmission according to an embodiment
  • FIG. 9 is a schematic structural diagram of an apparatus for USB cable transmission of a second embodiment
  • FIG. 10 is a schematic structural diagram of an apparatus for USB cable transmission of a third embodiment.
  • the system environment of the embodiment of the present invention includes a display source device (ie, a first device), a screen device (ie, an analog USB device), and a display device (ie, a second device).
  • the display source device may be a device or a system running an operating system such as a PC or a mobile phone, and the system has at least one pre-installed universal driver therein, and the universal driver provides universal communication between the first device and the standard USB device. letter of agreement.
  • the display source device is further provided with at least one USB interface (ie, a USB interface D/third USB interface), and the attribute of the USB interface is set to a USB host.
  • the display device is a device or system running an operating system, such as a large-screen electronic whiteboard, and the display device is further provided with at least one USB interface (ie, a USB interface A/fourth USB interface), and the attribute of the USB interface is set to USB host.
  • the screen device is provided with a USB interface, a memory, and a processor.
  • the USB interface includes a USB interface C and a USB interface B (ie, a first USB interface and a second USB interface), and the attributes of the two USB interfaces are all USB devices, which are respectively connected to the display source device and the display device.
  • the embedded device can run an embedded operating system and connect to the display source device through the USB interface C.
  • the USB interface B can be an ordinary USB interface for accessing a display device such as a smart tablet (or other large-screen device). , driven and identified by the system of the display device.
  • the screen device can be combined with a USB cable to form a custom special USB cable, or it can be a combination of a USB dongle with a screen device and a standard USB cable.
  • One of the uses of the memory is a downloader that requires a specific program or a specific program for storing a display source device or a display device.
  • the screen device can be powered directly through the USB interface of the display source
  • FIG. 2 is a schematic flowchart of a method for USB wired screen transmission according to an embodiment of the present invention.
  • the method is applied to a screen transmission device as an example.
  • the screen device includes a first USB interface and a second USB interface for accessing the display source device and the display device, respectively.
  • the method for USB cable transmission in this embodiment includes the following steps:
  • the first device is provided with a plurality of communication protocol ports by using a first USB interface of the local end, where the communication protocol port can be recognized by a universal driver of the first device, where the universal driver provides communication between the first device and the standard USB device.
  • General communication protocol General communication protocol;
  • the first device is a display source device
  • the local device refers to a screen device.
  • the screen device can be emulated into several types of standard USB devices and provide corresponding communication protocol ports, the communication protocol ports including at least ports for transmitting audio and video data and ports for virtual sound cards.
  • the pre-installed universal driver is also provided with a corresponding communication protocol port.
  • the universal driver pre-installed on the display source device can independently drive different types of standard USB devices.
  • the standard USB device is simulated by the screen device.
  • the display source device can be recognized by the drive (ie, it can be recognized by the universal drive without specific Universal driver).
  • the USB interface is a physical concept
  • the communication protocol port provided through the USB interface is an abstract concept for the USB connection service.
  • Different communication protocol ports can be distinguished by corresponding port identifiers, for example, by port number. distinguish.
  • the port identifiers of the communication protocol ports can be recognized by the universal USB driver, and the processor in the screen device also performs various types of information (including audio and video data or control signals) through the port identifier of the communication protocol port. Transceiver, to achieve the transmission and reception of a variety of different types of information through the same physical interface.
  • the screen device can be simulated into several types of standard USB devices, which means that the screen device can be based on universal standard USB communication.
  • the protocol enumerates several standard USB communication protocol ports, and different USB communication protocol ports use different port identifiers for distinguishing.
  • the communication protocol port further includes: a port for transmitting connection information.
  • a connection success instruction may also be generated; the connection success instruction is adapted to the port for transmitting the connection information, and passes through the first USB interface. Send to the first device.
  • the port of the virtual sound card is used to instruct the first device to switch its system sound to the virtual sound card simulated by the local end, and the virtual sound card is not connected to any power amplifier device;
  • a virtual USB sound card is simulated in advance through the first USB interface of the screen device, and after the screen device is connected to the display source device USB, the display source device can automatically recognize the virtual USB sound card and switch its system sound to The virtual sound card of the local end is simulated.
  • a display source device such as a PC
  • the system automatically detects a virtual sound card, that is, a virtual sound card simulated by the screen device, thereby displaying the source device and then the system. The sound switches to the virtual sound card. Since the virtual USB sound card is not connected to the actual power amplifier, this method does not cause the system sound of the display source device to be abnormal, and the display source device does not sound, similar to the effect of mute.
  • the second device is a display device.
  • a corresponding client software is installed in the display source device for receiving a screen operation of the user.
  • the communication protocol port further includes: a port for accessing the storage space.
  • Memory storage space
  • An external USB flash drive
  • the packaged audio and video data is sent to the screen device (in this case, the screen device is equivalent to an analog USB device).
  • the second method has lower requirements on the display source device, and even if it does not have the corresponding program installed in advance, the related function can be realized by accessing the memory of the screen device, and for the display source device (for example, a PC), the USB interface is inserted.
  • execution order of the above steps S13 and S14 is not limited to the above sequence, and the execution order of the two parts may be changed, or may be performed simultaneously.
  • the communication protocol port further includes a port for transmitting a control signal.
  • the method for USB cable transmission of the embodiment further includes the step of: detecting that the second USB interface of the screen device has a second device from the second device Manipulating the signal, adapting the manipulation signal to a port for transmitting the manipulation signal, and transmitting to the first device through the first USB interface of the screen device, instructing the first device to perform after receiving the manipulation signal The corresponding action of the manipulation signal.
  • the control device can also receive the control signal of the display device from the USB interface B through the screen device, and the control device can transmit the control information based on the pre-determined port information, and the screen device receives the display device.
  • the control signal it is adapted to the port for transmitting the control signal, whereby the control signal of the display device can be transmitted back to the display source device through the USB interface C, so that the display source device converts the control signal into a corresponding manipulation event. And perform the corresponding manipulation action.
  • the screen device converts the touch event into a HID touch event, which is simulated as a HID touch device, and submits the HID touch event to the display source device system through the USB interface C.
  • the HID touch is processed according to the conventional method.
  • the type of the control signal includes: a touch control signal, an infrared remote control signal, or a mouse/keyboard control signal; and the corresponding action of the control signal may be any action that can be performed on the display source device side.
  • USB communication protocol ports that need to be used for common display source devices can be provided, and the display source device can be driven to avoid it, and can also be based on data stored in the screen transmission device.
  • the information completes the corresponding audio and video data interception function, and realizes the effect of plug and play; and only one connection line can realize the screen connection connection between the display source device and the display device, and at the same time, realize the return transmission of the display device control signal , simplifying the wiring of the screen display; more importantly, simulating a virtual sound card through the screen device, after the screen device is connected to the display source device USB, switching the system sound of the display source device to the screen device simulation The virtual sound card is simultaneously forwarded to the corresponding display device through the USB interface of the screen device. Therefore, when the display source device side no longer plays the sound through the power amplifier, the problem that the display source device and the display device simultaneously emit sound interferes when the screen involving the sound is overcome.
  • the port for transmitting the connection information may be the HID1 port and the HID2 port respectively; and the port for transmitting the storage space access instruction may be the Mac type port.
  • the screen device in this embodiment can be simulated by the USB interface C into a plurality of types of communication protocol ports that can be recognized by the display source terminal, and can be independently driven by the display source terminal. Drivers are used to transmit different types of data information.
  • the screen device detects that the USB interface C has information from the display source device, and detects a communication protocol port for transmitting the information, if The port for transmitting the return request identifies the information as a backhaul request command; forwarding the backhaul request command to the display device via the USB interface B to cause the display device to return to the detected control signal.
  • the steps to be performed by the screen device are as follows:
  • USB interface C Detect whether the USB interface C has a device connection, and if so, further check whether the device is a display source device that meets the requirements. If the display source device meets the requirements, the display source device switches the system sound to the virtual sound card simulated by the local end through the port of the virtual sound card, and the virtual sound card is not connected to any power amplifier device.
  • USB interface B Detect whether the USB interface B has a device connection, and if so, further check whether the device is a display device that meets the requirements.
  • steps S102 and S103 are not limited to the example in the figure, and step S103 may be performed first, and then step S102 may be performed; or two parts may be simultaneously executed.
  • connection success instruction is adapted to a port for transmitting connection information, and is sent to the first device through the USB interface C; meanwhile, the display device is sent through the USB interface B based on a protocol rule predetermined with the display device. A successful connection command is issued.
  • the screen device after detecting that the USB interface C has the information from the display source device, the screen device further detects the communication protocol port that transmits the information, and if it is a port for transmitting audio and video data, the information may be identified as Audio and video data.
  • the screen device further provides a port for accessing the storage space to the display source device.
  • the screen device detects that the USB interface C has information from the display source device, it further detects the communication protocol port that transmits the information, and if it is a port for accessing the storage space, the information is identified as being stored.
  • the space access instruction the screen device displays the content information of the preset storage space to the display source device, so that the display source device system interface can be used to intercept the screen and audio played by the display source device by running the program of the storage space.
  • the storage space of the screen device stores an exe executable program for intercepting audio and video data, or stores download information of the corresponding program. Therefore, the display source device is configured to access the currently played screen or audio by accessing information of the storage space of the screen device.
  • the received audio and video data can be identified according to the communication protocol port used by the screen device, and directly forwarded to the second device through the USB interface B.
  • the screen device After the screen device recognizes that the audio and video data is received, it also monitors whether there is a preset trigger control signal for indicating information forwarding, and if the trigger control signal is monitored, The audio and video data is forwarded to the second device through the USB interface B.
  • the trigger control signal may be an operation signal that the preset button of the screen device is pressed, or may be a specific touch control signal generated on the human-machine interface provided by the screen device, that is, the user may trigger through hardware.
  • Software trigger mode to control the forwarding of audio and video data by the screen device to flexibly control the effect of the screen display.
  • the screen device detects that the USB interface C has information from the display source device, detecting a communication protocol port that transmits the information, if the port is used for transmitting the return request, the information may be identified as back. Pass the request instruction.
  • the triggering mechanism for forwarding audio and video data is also applicable to triggering the forwarding of the return request command by the screen device, that is, the hardware trigger mode/software trigger mode can be used to control the transmission device to return the transmission. Request forwarding of instructions.
  • the screen transmitting device sends the received backhaul request command to the display device through the USB interface B according to the protocol rule agreed with the display device.
  • steps S105 and S106, steps S107 and S108 is not limited to the example in the figure, and steps S107 and S108 may be performed first, and then steps S105 and S106 may be performed; or both parts are set according to respective time intervals. Execute in parallel.
  • the screen device can detect whether the information received by the USB interface B from the display device is a control signal according to a protocol rule agreed with the display device.
  • the trigger mechanism for forwarding audio and video data is also applicable to triggering the forwarding of the control signal by the screen device, that is, the hardware trigger mode/software trigger mode can be used to control the forwarding of the control signal by the screen device. To flexibly control the effect of remote control.
  • the wired screen method of the embodiment by pre-simulating a virtual USB sound card and a standard USB device, instructing the display source device to switch its system sound to the virtual sound card simulated by the local end through the port of the virtual sound card, thereby causing the display source
  • the device does not sound, and does not cause the sound of the display source device to be abnormal, thereby overcoming the interference problem of simultaneous sound generation between the display source and the display device; providing a plurality of communication protocol ports required for the display source device through the simulated standard USB device Establishing a wired screen connection of the display source device and the display device through the simulated USB device; detecting the communication protocol port transmitting the information when detecting that the first USB interface of the simulated USB device has information from the display source device If the port is used for transmitting audio and video data, the information is recognized as audio and video data; the audio and video data is forwarded to the display device through the second USB interface of the local end to play the corresponding sound on the display device.
  • the The control signal is adapted to the port for transmitting the control signal, and is sent to the display source device through the first USB interface, so that the display source device performs an action corresponding to the manipulation signal, thereby realizing the manipulation display on the display device side
  • the effect of the source device Based on the analog USB device, the display source device and the display device can realize the transmission and display of audio and video data only by one connection line, and at the same time, realize the return of the control signal of the display device, simplify the wiring of the screen display, and reduce the pair. User wiring is difficult.
  • the method for USB cable transmission in this embodiment includes the following steps.
  • Step S21 The universal driver pre-installed by the first device (display source device) identifies a communication protocol port provided by the currently accessed USB device (screening device), and the universal driver provides a connection between the first device and the standard USB device.
  • a general communication protocol for communication the communication protocol port at least comprising: a port for transmitting audio and video data and a port of an analog virtual sound card;
  • the USB device is provided with a first USB interface, and the USB device passes the first
  • the USB interface is connected to the first device USB interface, and provides a plurality of communication protocol ports that can be recognized by the universal drive of the first device through the first USB interface;
  • the USB interface C of the screen device is connected to the USB interface D of the display source device, and the attribute of the USB interface D is a USB host;
  • the display source device refers to a device used as a display source.
  • Step S22 Switching the system sound of the first device to the virtual sound card simulated by the USB device by using the port of the virtual sound card, and the virtual sound card is not connected to any power amplifier device;
  • the universal driving device pre-installed by the display source device can automatically identify the virtual sound card simulated by the USB device, and after identifying the virtual sound card, the port of the virtual sound card provided by the USB device indicates that the display source device will The system sound is switched to the virtual sound card simulated by the local end, so that the display source device does not sound, and the sound of the display source device is not abnormal.
  • Step S23 intercepting the picture and audio played by the first device; and transmitting the intercepted audio and video data to the first USB interface of the USB device through the USB interface of the first device.
  • the communication protocol port further includes: a port for accessing the storage space.
  • the manner of capturing the picture and audio played by the source device may be implemented by running a program stored in the screen device, for example, generating a storage space access instruction according to a user operation of the display source device, and adapting the access instruction to the Accessing the port of the storage space and sending it to the USB interface C of the USB device to
  • the program for accessing the preset storage space of the USB device and running the preset storage space through the system interface of the display source device is used for intercepting the picture and audio played by the display source device. Thereby, it is not necessary to pre-install the corresponding program on the display source device, which provides convenience for the user.
  • the intercepted audio and video data may also be compressed and/or encoded by a program that displays a preset storage space of the USB device by displaying a system interface of the source device to facilitate transmission.
  • execution order of the above steps S22 and S23 is not limited to the above sequence, and the execution order of the two parts may be changed, or may be performed simultaneously.
  • the communication protocol port further includes a port for transmitting a control signal.
  • the USB cable screen method further includes the step of: displaying, by the source device, the first USB interface from the USB device. Information, detecting a communication protocol port that transmits the information; if it is a port for transmitting a manipulation signal, identifying the information as a manipulation signal, causing the display source device to perform an action corresponding to the manipulation signal.
  • the display source device user can select whether to need to enable the control signal return function according to actual needs, and if necessary, send a return request to the display device through the screen device after the connection is successfully established, correspondingly, the communication
  • the protocol port also includes a port for transmitting a backhaul request.
  • the specific manner is as follows: obtaining the return request identifier bit information preset by the display source device, determining whether the return request function of the display source device is the open state according to the return request identifier bit information; if yes, generating a return request request;
  • the return request command is adapted to the port for transmitting the return request, and is sent to the USB interface C of the screen device, and sent to the display device through the USB interface B of the screen device.
  • FIG. 5 is a detailed flowchart of a method for USB cable transmission of the second embodiment; referring to FIG. 5, the steps for displaying the source device are as follows:
  • S201 running a universal driver for displaying the source device, and detecting, in the background of the system, whether a USB device (ie, a screen device) having a specific ID (PID/VID) conforming to the characteristics of the screen device is accessed;
  • a USB device ie, a screen device
  • PID/VID specific ID
  • the screen device is virtualized into a virtual sound card through a USB interface connected to the display source device, and the virtual sound card can be automatically recognized by a universal driver pre-installed in the display source device.
  • the universal driving of the display source device detects the information of the USB interface C from the screen device received by the USB interface D of the display source device, and detects the communication protocol port that transmits the information, if it is used to transmit the connection information.
  • the port can identify whether the information is a connection success command according to the content of the signal.
  • S203 if received, intercepting a picture and/or audio currently displayed by the display source device, and then compressing or encoding into a specific file format, and then transmitting the image to the connected screen device;
  • the port for accessing the storage space is obtained from the communication protocol port provided by the screen device to the display source device; the storage space access instruction is generated according to the user operation of the display source, and the access instruction is adapted to the use Accessing the port of the storage space and sending it to the USB interface C of the screen device to access the preset storage space of the screen device, and running the program of the preset storage space through the system interface of the display source device for intercepting the display The picture and audio played by the source device. Therefore, the display source device does not need to install the corresponding program in advance, which provides convenience for the user.
  • the audio and video data may also be compressed and/or encoded by a program that displays the default storage space of the screen device by displaying the system interface of the source device for transmission. Because the interception code is stored in a U disk emulated by the screen device, after the display source device is connected to the screen device, the USB communication protocol port pre-simulated through the USB interface of the screen device can be viewed and stored in the screen device. Exe program data, By running the relevant program in the screen device, the screen and/or audio (including sound data, including audio adjustment information such as volume and channel) currently displayed by the source device can be intercepted.
  • the backhaul request identifier information preset by the display source device may be read to determine whether the current backhaul request function of the display source device is in an open state.
  • the current backhaul request function of the source device is displayed as being on, generating a return request command according to the user operation; obtaining a port for transmitting the return request from the communication protocol port provided by the screen device to the display source device;
  • the USB interface C of the screen device is sent to the display device through the USB interface B of the screen device.
  • the USB interface D is detected to receive the information of the USB interface C from the screen device, and the communication protocol port for transmitting the information is detected. If the port is used for transmitting the control signal, the external HID device can be controlled according to the conventional processing. The manner of the signal, identifying the returned control signal, and causing the first device to perform an action corresponding to the manipulation signal.
  • steps S204 and S205 and steps S206-S207 is not limited to the example in the figure, and steps S206-S207 may be performed first, and then steps S204 and S205 may be performed; or both parts are set according to respective time intervals. Execute in parallel.
  • the wired screen method of the embodiment provides a display source device with a plurality of communication protocol ports through a USB interface of the simulated USB device by emulating a standard USB device in advance to establish a display source device and display through the simulated USB device.
  • Wired screen connection of the device reduces the requirement for the display source device, realizes plug and play, and displays that the source device and the display device can realize the screen display of audio and video data with only one connection line, and at the same time, Realizing the backhaul of the control signal of the display device, realizing the effect of manipulating the display source device on the display device side, simplifying the wiring of the screen display, and reducing the difficulty of wiring the user.
  • FIG. 6 is a schematic flowchart of a method for USB cable transmission of a third embodiment; the embodiment is applicable to a display device. As shown in FIG. 6, the method for USB cable transmission in this embodiment includes the following steps.
  • the USB device of the second device is detected to have a USB device access, and the USB device is identified as a USB device that meets the requirements.
  • the USB device is configured with a second USB interface, and the USB device is connected through the second USB interface. Into the second device USB interface;
  • the USB interface A of the display device has a USB device access, and whether the current access device is the above-mentioned screen device can be determined according to the PID and/or VID of the USB device.
  • the display device refers to a device used to display audio and video information, and the attribute of the USB interface A is a USB host.
  • the USB device is virtualized into a virtual sound card through its USB interface connected to the display source device, and the virtual sound card can be automatically recognized by a universal driver pre-installed in the display source device.
  • USB device If the USB device meets the requirements, receive the audio and video data forwarded by the second USB interface of the USB device through the USB interface of the second device, and play the corresponding audio and video on the second device;
  • the connection response signal may also be generated and sent to the USB interface B of the screen device to notify the screen device that the device matches the sound.
  • the screen device can confirm whether the connection is successful according to the information.
  • the audio and video data is compressed and/or encoded at the display source end, and the corresponding display device needs to perform corresponding decompression and/or de-compression processing on the audio and video data, and the processing is performed.
  • the corresponding picture and/or audio is then played on the display device.
  • the type of the control signal in this embodiment may include: a touch control signal, an infrared remote control signal, or a mouse/keyboard control signal; and the corresponding action of the manipulation signal may be any action that can be performed on the display source device side.
  • FIG. 7 is a detailed flowchart of a method for USB cable transmission of the third embodiment; referring to FIG. 7, the steps to be performed by the display device are as follows:
  • the ID is a USB ID (PID or VID) of the screen device preset in the program; therefore, it is detected whether the screen device is connected to the USB interface A of the display device.
  • PID USB ID
  • the specified format data information is sent through the USB interface A, and the local end of the screen transmission device is notified to meet the requirements of the audio and video transmission display;
  • the screen device is virtualized into a virtual sound card through a USB interface connected to the display source device, and the virtual sound card can be automatically recognized by a universal driver pre-installed in the display source device.
  • the display device can make a customized terminal, the signal type transmitted by the USB interface B of the screen device can be automatically recognized. That is, the display device can recognize whether the transmission device sends the audio and video data, or the request for returning the request, or the instruction for successful connection.
  • the audio and video file stream is data subjected to compression and encoding processing.
  • the audio and video file stream transmitted by the screen transmission device is received, the audio and video data is decompressed or decoded, and the corresponding picture and audio are outputted, thereby realizing the screen display of the display device and the display source device.
  • the display device can also return the preset message to the screen device, and forward it to the display source device through the communication protocol port pre-simulated by the screen device to notify the display source device that the screen display is successful.
  • the display device can detect information from the USB interface B of the screen device, and identify whether the information identifies whether it is a backhaul request instruction.
  • the display device acquires a control signal detected by the local end for controlling the display source device by running a preset program, and the signal type includes but is not limited to a touch control signal, an infrared remote control signal, or a mouse/keyboard control signal.
  • the screen device can be simulated into several types of USB devices through its USB interface, so that the display source device can be protected from special drive recognition.
  • the screen device also obtains a data stream of the manipulation signal from the display device and adapts it to the corresponding port provided to the display source device for transmission; the code for intercepting the audio and video data is a system interface for displaying the source device, but the corresponding exe program
  • the data can be saved in a USB flash drive emulated by the screen device.
  • the screen device is also emulated as a USB storage device, storing program data or a program downloader for data communication and intercepting audio and video data of the display source device.
  • the USB storage device simulated by the screen device can be accessed to run the corresponding exe program data for intercepting the screen or audio of the display source device.
  • the display source device may also package the audio and video data according to the agreed protocol by running the corresponding exe program data stored in the screen device, and transmit the corresponding communication protocol port provided to the display source device to the screen transmission device through the screen device, and the screen device Received a packet from USB interface C, not Change the contents of the package and forward it directly to the display device via USB interface B.
  • the display device receives the data packet, parses the protocol and the content of the packet, and then decodes the audio and video data for playback.
  • the display device software can also obtain a touch operation signal (or other type of control signal) that the user touches the display source device through the display device, and transmit the signal to the screen transmission device through the USB interface A, and the screen device adapts the operation signal to the corresponding communication.
  • the protocol port is then submitted to the display source device for execution.
  • the display source device identifies the transmitted touch operation signal according to the corresponding communication protocol port provided by the USB interface C of the screen transmission device, and converts it into a manipulation event (the touch operation signal is converted into a touch event.
  • This process is to display the operating system support of the source device.
  • the WINDOWS/MAC has this function), thereby causing the display source device to perform an action corresponding to the manipulation signal.
  • the present invention also provides a USB cable screen device and system, and the device and system can be used to perform the above USB cable screen method.
  • the device and system can be used to perform the above USB cable screen method.
  • the illustrated structure does not constitute the device and the system.
  • the definition may include more or fewer components than those illustrated, or some components may be combined, or different component arrangements.
  • FIG. 8 is a schematic structural diagram of an apparatus for USB wired screen transmission according to an embodiment of the present invention.
  • the apparatus for USB wired screen transmission of the embodiment includes: a port simulation module 510, a connection establishment module 520, and a virtual
  • the sound card module 530 and the audio and video data forwarding module 540 are detailed as follows:
  • the port emulation module 510 is configured to provide, by using a first USB interface of the local end, a plurality of communication protocol ports to the first device, where the communication protocol port can be identified by a universal drive of the first device, where the universal drive provides the first device a universal communication protocol for communication with a standard USB device, the communication protocol port including at least: a port for transmitting audio and video data and a port for an analog virtual sound card;
  • connection establishing module 520 is configured to establish a USB communication connection between the local end and the first device by using the communication protocol port and the first USB interface;
  • the virtual sound card module 530 is configured to indicate, by using a port of the virtual sound card, that the first device switches its system sound to a virtual sound card simulated by the local end, and the virtual sound card is not connected to any power amplifier device;
  • the audio and video data forwarding module 540 is configured to detect that the first USB interface has information from the first device, detect a communication protocol port that transmits the information, and if the port is used for transmitting audio and video data, identify the information. And the audio and video data is forwarded to the second device by using the second USB interface of the local end, and the second device is instructed to play the corresponding audio and video after receiving the audio and video data.
  • the audio/video data forwarding module 540 identifies the information as audio and video data, it also monitors whether there is a preset trigger control signal for indicating information forwarding, and if the preset is used for indicating The triggering control signal of the information forwarding forwards the audio and video data to the second device through the second USB interface of the local end.
  • the trigger control signal includes an operation signal that the preset control button is pressed, and may further include a touch control signal that is monitored by the preset human-machine interaction interface. This makes it easy for the user to flexibly control the effect of the screen display.
  • the communication protocol port further includes: a port for transmitting connection information; correspondingly, the device for USB cable transmission further includes a connection confirmation module (not shown) for generating a connection success instruction. And adapting the connection success instruction to a port for transmitting connection information, and transmitting to the first device through the first USB interface.
  • the communication protocol port further includes a port for transmitting a control signal.
  • the device for the USB cable screen further includes:
  • the control signal returning module 550 is configured to detect that the second USB interface has a control signal from the second device, and then adapt the control signal to a port for transmitting the control signal, and send the signal through the first USB interface. And to the first device, instructing the first device to perform an action corresponding to the manipulation signal after receiving the manipulation signal.
  • the communication protocol port further includes: a port for transmitting a return request; correspondingly, the USB wired screen device further includes a backhaul request module (not shown) for detecting
  • the first USB interface has information from the first device, detects a communication protocol port that transmits the information, and if it is a port for transmitting a return request, identifies the information as a backhaul request instruction; and the backhaul request instruction Forwarding to the second device through the second USB interface, instructing the second device to return the detected control signal to the first device.
  • the communication protocol port further includes: a port for accessing the storage space; correspondingly, the device for the USB cable screen further includes a storage module 560, configured to detect that the first USB interface has the first device Information, detecting a communication protocol port for transmitting the information, if it is a port for accessing the storage space, identifying the information as a storage space access instruction; displaying the preset storage space to the first device, so that the system of the first device The interface intercepts the picture and audio played by the first device by the program running the storage space.
  • the attributes of the first USB interface and the second USB interface are all USB devices; the first device is a display source device, and the second device is a display device.
  • the USB wired screen device of this embodiment includes:
  • the USB identification module 610 is configured to identify, by using a pre-installed universal driver, a communication protocol port provided by a USB device that accesses the USB interface of the first device, where the universal driver provides a universal communication protocol for communication between the first device and the standard USB device.
  • the communication protocol port includes at least: a port for transmitting audio and video data and a port of an analog virtual sound card; the USB device is provided with a first USB interface, and the USB device accesses the first USB interface a device USB interface, and through the first USB interface, provides a plurality of communication protocol ports that can be recognized by the universal drive of the first device;
  • the sound switching module 620 is configured to switch the system sound of the first device to the virtual sound card simulated by the USB device by using the port of the virtual sound card, where the virtual sound card is not connected to any power amplifier device;
  • the audio and video intercepting module 630 is configured to intercept the picture and audio played by the first device
  • the audio and video sending module 640 is configured to send to the first USB interface of the USB device by using a designated port of the USB interface of the first device, where the designated port is adapted to be used for transmitting audio and video data.
  • the communication protocol port further includes a port for transmitting a control signal;
  • the device for the USB cable screen further comprises:
  • the control signal receiving module 650 is configured to receive information from the first USB interface of the USB device, and detect a communication protocol port that transmits the information; if it is a port for transmitting a control signal, identify the information as a control signal, so that The first device performs an action corresponding to the manipulation signal.
  • the communication protocol port further includes: a port for accessing the storage space; correspondingly, the audio and video intercepting module 630 is specifically configured to adapt the generated access instruction to a port for accessing the storage space, and Sending to the first USB interface of the USB device through the USB interface of the first device to access the preset storage space of the USB device, and running the preset storage space through the first device system interface for intercepting The picture and audio played by the first device.
  • the audio and video intercepting module 630 is specifically configured to adapt the generated access instruction to a port for accessing the storage space, and Sending to the first USB interface of the USB device through the USB interface of the first device to access the preset storage space of the USB device, and running the preset storage space through the first device system interface for intercepting The picture and audio played by the first device.
  • the first device is a display source device; and the attribute of the first USB interface is a USB device.
  • FIG. 10 is a schematic structural diagram of an apparatus for USB cable transmission of a third embodiment. As shown in FIG. 10, the USB cable transmission of this embodiment
  • the device of the screen includes:
  • the USB access detection module 710 is configured to detect that the USB device of the second device has a USB device access, and identify whether the USB device is a USB device that meets the requirements; the USB device is configured with a second USB interface, and the USB device passes The second USB interface is connected to the USB interface of the second device;
  • the USB device is virtualized into a virtual sound card through a USB interface connected to the display source device, and the virtual sound card can be automatically recognized by a universal driver pre-installed in the display source device.
  • the audio and video data receiving module 720 is configured to receive audio and video data forwarded by the second USB interface of the USB device through the second device USB interface, and play the corresponding audio and video on the second device, if the USB device meets the requirements;
  • a control signal sending module 730 configured to acquire a control signal of the first device detected by the second device, and send the control signal to a second USB interface of the USB device to pass through the USB device
  • the first USB interface returns to the first device, instructing the first device to perform an action corresponding to the manipulation signal after receiving the manipulation signal.
  • the second device is a display device
  • the attribute of the second USB interface is a USB device
  • each functional module is merely an example, and the actual application may be considered according to requirements, for example, for the configuration requirements of the corresponding hardware or the convenience of implementation of the software.
  • the above function assignment is performed by different function modules, that is, the internal structure of the USB wired screen device is divided into different functional modules to complete all or part of the functions described above.
  • Each function module can be implemented in the form of hardware or in the form of a software function module.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明涉及USB有线传屏的方法及装置。所述方法包括：通过本端的第一USB接口向第一设备提供若干通信协议端口，且能够被第一设备的通用驱动识别，通过所述通信协议端口、第一USB接口建立本端与第一设备的USB通信连接；通过所述虚拟声卡的端口指示所述第一设备将其系统声音切换至本端模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则将该信息识别为音视频数据；将音视频数据通过本端的第二USB接口转发至第二设备。本发明能够克服显示源端和显示设备端同时发声的问题。

Description

USB有线传屏的方法及装置 技术领域
本发明涉及数据传输技术领域，特别是涉及USB有线传屏的方法及装置。
背景技术
目前的传屏实现方式是，如图1所示，传屏设备两端分别连接显示源PC和显示终端，显示源PC通过截取系统的屏幕页面和声音数据，将截取的屏幕页面和声音数据一起通过传屏设备发送到显示终端，显示终端显示和播放传屏设备发送过来的画面和声音，以达到传屏的目的。
为了截取声音，在PC端需要输出声音，因此在传屏过程中，显示源PC和显示终端都会通过各自的功放发出声音；然而当显示源PC和显示终端在同一房间内时，这种情况则会存在相互干扰。因此很多情况下，都选择关掉声音，仅进行显示画面的传屏，但难以达到预期的效果。
发明内容
基于此，本发明实施例提供的USB有线传屏的方法及装置，能够克服显示源设备和显示终端同时发声存在干扰的问题。
本发明一方面提供USB有线传屏的方法，包括：
通过本端的第一USB接口向第一设备提供若干通信协议端口，所述通信协议端口能够被第一设备的通用驱动识别；所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和模拟的虚拟声卡的端口；
通过所述通信协议端口、所述第一USB接口建立本端与所述第一设备的USB通信连接；通过所述虚拟声卡的端口指示所述第一设备将其系统声音切换至本端模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则将该信息识别为音视频数据；将所述音视频数据通过本端的第二USB接口转发至第二设备，指示所述第二设备在接收到所述音视频数据后播放对应的音视频。
本发明另一方面提供一种USB有线传屏的方法，包括：
通过预安装的通用驱动识别接入第一设备USB接口的USB设备提供的通信协议端口；所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和模拟的虚拟声卡的端口；所述USB设备设置有第一USB接口，所述USB设备通过所述第一USB接口接入第一设备USB接口，并通过所述第一USB接口提供若干能够被第一设备的通用驱动识别的通信协议端口；
通过识别出的虚拟声卡的端口将第一设备的系统声音切换至所述USB设备模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
截获第一设备播放的画面和音频；将截获到的音视频数据通过第一设备的USB接口发送至所述USB设备的第一USB接口。
本发明又一方面提供一种USB有线传屏的装置，包括：
端口模拟模块，用于通过本端的第一USB接口向第一设备提供若干通信协议端口，所述通信协议端口能够被第一设备的通用驱动识别，所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和虚拟声卡的端口；
连接建立模块，用于通过所述通信协议端口、所述第一USB接口建立本端与所述第一设备的USB通信连接；通过所述虚拟声卡的端口指示所述第一设备将其系统声音切换至本端模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
音视频数据转发模块，用于检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则将该信息识别为音视频数据；将所述音视频数据通过本端的第二USB接口转发至第二设备，指示所述第二设备在接收到所述音视频数据后播放对应的音视频。
本发明又一方面提供一种USB有线传屏的装置，包括：
USB识别模块，用于通过预安装的通用驱动识别接入第一设备USB接口的USB设备提供的通信协议端口；所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和虚拟声卡的端口；所述USB设备设置有第一USB接口，所述USB设备通过所述第一USB接口接入第一设备USB接口，并通过所述第一USB接口提供若干能够被第一设备的通用驱动识别的通信协议端口；
声音切换模块，用于通过识别出的虚拟声卡的端口将第一设备的系统声音切换至所述USB设备模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
音视频截获模块，用于截获第一设备播放的画面和音频；
音视频发送模块，用于将截获到的音视频数据通过第一设备的USB接口发送至所述USB设备的第一USB接口。
上述技术方案，通过传屏设备模拟一个虚拟声卡，在所述传屏设备与显示源设备USB连接之后，将显示源设备的系统声音切换至该屏设备模拟的虚拟声卡；同时将截获到的显示源设备的音视频数据通过所述传屏设备的USB接口转发至对应的显示设备。使得在显示源设备端不再通过功放播放声音，克服了涉及声音的传屏时，显示源设备和显示设备同时发声存在干扰的问题。
附图说明
图1为实施本发明USB有线传屏的方法的系统环境示意图；
图2为一实施例的USB有线传屏的方法的示意性流程图；
图3为一实施例的USB有线传屏的方法的详细流程图；
图4为第二实施例的USB有线传屏的方法的示意性流程图；
图5为第二实施例的显示源设备USB有线传屏的方法的详细流程图；
图6为第三实施例的USB有线传屏的方法的示意性流程图；
图7为第三实施例的显示设备USB有线传屏的方法的详细流程图；
图8为一实施例的USB有线传屏的装置的示意性结构图；
图9为第二实施例的USB有线传屏的装置的示意性结构图；
图10为第三实施例的USB有线传屏的装置的示意性结构图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
图1为实施本发明有线传屏的方法的系统环境示意图。如图1所示，本发明实施例的系统环境包括显示源设备(即第一设备)、传屏设备(即模拟USB设备)和显示设备(即第二设备)。所述显示源设备可为PC、手机等运行有操作系统的设备或系统，其系统内拥有至少一个预安装的通用驱动，所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议。所述显示源设备还至少设置有一USB接口(即USB接口D/第三USB接口)，且该USB接口的属性设为USB host。所述显示设备为运行有操作系统的设备或系统，例如大屏电子白板，所述显示设备还至少设置有一USB接口(即USB接口A/第四USB接口)，且该USB接口的属性设为USB host。
所述传屏设备设置有USB接口、存储器以及处理器。所述USB接口包括USB接口C和USB接口B(即第一USB接口和第二USB接口)，两个USB接口的属性均为USB device，分别用于与显示源设备、显示设备相连。传屏设备内部可运行一个嵌入式操作系统，并通过USB接口C与显示源设备连接；USB接口B可以为普通的USB接口，用于接入智能平板(或其他大屏设备)等显示设备上，由显示设备的系统驱动和识别。传屏设备可以与USB线材结合成一根定制的特殊USB线材，也可以是一个带传屏设备的USB dongle加标准USB线材的结合的方式存在。所述存储器的用途之一为需要用于存放显示源设备或显示设备需要用到的特定程序或特定程序的下载器。传屏设备可直接通过显示源设备的USB接口或显示设备的USB接口获得供电。
基于图1所示的系统环境示意图，图2为一实施例的USB有线传屏的方法的示意性流程图；在该实施例中，是以该方法应用于传屏设备为例进行说明，所述传屏设备包含第一USB接口和第二USB接口，分别用于接入显示源设备和显示设备。
如图2所示，本实施例USB有线传屏的方法包括步骤：
S11，通过本端的第一USB接口向第一设备提供若干通信协议端口，所述通信协议端口能够被第一设备的通用驱动识别，所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议；
本实施例中，第一设备即为显示源设备，本端指的是传屏设备。传屏设备可模拟成若干类型的标准USB设备，并提供对应的通信协议端口，所述通信协议端口至少包括：用于传输音视频数据的端口以及虚拟声卡的端口。对应的，在显示源设备端，预安装的通用驱动也提供有相应的通信协议端口。显示源设备预安装的通用驱动能够独立地驱动不同类型的标准USB设备，传屏设备模拟成的标准USB设备，显示源设备能免驱识别到它(即通过通用驱动便能识别，无需特定的通用驱动)。
本实施例中USB接口是物理上的概念，而通过USB接口提供的通信协议端口则是面向USB连接服务的抽象的概念，不同的通信协议端口可通过相应端口标识进行区分，例如通过端口号进行区分。在本实施例中，各通信协议端口的端口标识均能够被通用USB驱动识别，传屏设备内的处理器也通过通信协议端口的端口标识来进行多种类型信息(包括音视频数据或操控信号)的收发，以实现通过同一个物理接口实现多种不同类型信息的收发。
对应的，传屏设备可模拟成若干类型的标准USB设备，指的是传屏设备可基于通用的标准USB通信 协议枚举若干个标准USB通信协议端口，不同USB通信协议端口采用不同的端口标识进行区分。
S12，通过所述通信协议端口、所述第一USB接口建立本端与所述第一设备的USB通信连接；
优选的，所述通信协议端口还包括：用于传输连接信息的端口。当传屏设备确认建立了其与所述第一设备的USB通信连接后，还可生成连接成功指令；将所述连接成功指令适配到用于传输连接信息的端口，并通过第一USB接口发送至第一设备。
S13，通过所述虚拟声卡的端口指示所述第一设备将其系统声音切换至本端模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
本实施例中，预先通过传屏设备的第一USB接口模拟一个虚拟USB声卡，传屏设备与显示源设备USB连接之后，显示源设备可自动识别该虚拟USB声卡，并将其系统声音切换至本端模拟的虚拟声卡。对于显示源设备(例如PC)来说，在USB接口插入传屏设备的时候，系统会自动检测到一个虚拟声卡，即是传屏设备模拟的虚拟声卡，由此显示源设备就能将其系统声音切换至该虚拟声卡。由于该虚拟USB声卡并没有连接实际的功放，因此这种方式既不会引发显示源设备的系统声音异常，又可以让显示源设备不发声，类似于静音的效果。
S14，检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则将该信息识别为音视频数据；将所述音视频数据通过本端的第二USB接口转发至第二设备，指示所述第二设备在接收到所述音视频数据后播放对应的音视频；
本实施例中，第二设备即为显示设备。
本实施例中，显示源设备中安装有对应的客户端软件，用于接收用户的传屏操作。所述通信协议端口还包括：用于访问存储空间的端口。在显示源设备与传屏设备连接成功之后，若显示源设备预先安装了用于截获当前播放的显示画面和音频的软件程序，则通过该软件程序截获当前播放的显示画面和音频，将其进行打包处理后发送至传屏设备(此情况下传屏设备相当于模拟的USB设备)；若显示源设备没有安装用于截获当前播放的显示画面和音频的软件程序，则可通过访问传屏设备的存储器(存储空间)，读取传屏设备的存储器中存储的数据或者程序用于截获当前播放的显示画面和音频的软件程序，以及将其进行打包处理(此情况下传屏设备相当于一个外接的U盘)，然后将打包处理后的音视频数据发送至传屏设备(此情况下传屏设备又相当于模拟的USB设备)。第二种方式对显示源设备的要求更低，即使其没有预先安装相应的程序，也能够通过访问传屏设备的存储器实现相关功能，对于显示源设备(例如PC)来说，在USB接口插入传屏设备的时候，会在“我的电脑”根目录看到一个“可移动磁盘”，即是传屏设备预先模拟的存储空间，由此显示源设备就能从该“可移动磁盘”中运行预先存储的应用程序，进而实现了即插即用的效果。传屏设备从USB接口C接收到的音视频数据后，再通过USB接口B转发给显示设备，实现音视频数据的传屏显示。
需要说明的是，上述步骤S13和S14的执行顺序不限于上述顺序，两部分的执行顺序可调换，或者也可同时执行。
在传统的基于触摸屏显示设备的传屏模式中，若需将显示设备检测到的对第一设备的操控信号反馈给电脑端，需在电脑和所述显示设备之间需要增加一条用于传输控制信号的连接线。因此需电脑和显示设备之间需要两根或两根以上的连接线(HDMI线+USB线/RS232线，VGA线+音频线+USB线或RS232线等)才能实现。存在布线复杂，对用户专业水平要求较高的问题。为了进一步解决该问题，作为一优选实施方 式，所述通信协议端口还包括用于传输操控信号的端口；进一步的，本实施例的USB有线传屏的方法还包括步骤：检测到传屏设备的第二USB接口有来自第二设备的操控信号，则将所述操控信号适配到用于传输操控信号的端口，并通过传屏设备的第一USB接口发送至第一设备，指示第一设备在收到所述操控信号之后执行与所述操控信号相应的动作。
因此，本实施例通过传屏设备还可从USB接口B接收显示设备的控制信号，显示设备与传屏设备之间可基于预先预定的端口信息发送该控制信息，传屏设备收到显示设备的控制信号之后，将其适配到用于传输操控信号的端口，由此可通过USB接口C将显示设备的操控信号回传至显示源设备，使得显示源设备将操控信号转换为对应的操控事件并执行对应的操控动作。例如：传屏设备将触摸事件转换成为HID触摸事件，其模拟成HID触摸设备，通过USB接口C将该HID触摸事件提交给显示源设备系统，对于显示源设备系统来说，按照常规处理HID触摸设备的触摸事件的方式。所述操控信号的类型包括：触摸控制信号、红外遥控信号或者鼠标/键盘控制信号等；所述操控信号相应的动作可以是能在显示源设备端执行的任意动作。
基于上述的USB有线传屏的方法，一方面可为普通的显示源设备提供需要用到的各类USB通信协议端口，显示源设备能够免驱识别它，还能根据传屏设备中存储的数据信息完成相应的音视频数据截获功能，实现了即插即用的效果；并且只需一条连接线便可实现显示源设备和显示设备的传屏连接，同时还能实现显示设备操控信号的回传，简化了传屏显示的布线；更重要的是，通过传屏设备模拟一个虚拟声卡，在所述传屏设备与显示源设备USB连接之后，将显示源设备的系统声音切换至该屏设备模拟的虚拟声卡；同时将截获到的显示源设备的音视频数据通过所述传屏设备的USB接口转发至对应的显示设备。使得在显示源设备端不再通过功放播放声音，克服了涉及声音的传屏时，显示源设备和显示设备同时发声存在干扰的问题。
可以理解的是，本实施例中用于传输连接信息的端口、用于传输音视频信息的端口可分别为HID1端口、HID2端口；用于传输存储空间访问指令的端口可为Mac类型的端口。换句话说，本实施例中传屏设备可根据实际需要，通过其USB接口C模拟成多类能够被显示源终端免驱识别的通信协议端口，并且能够被显示源终端的通用驱动分别独立的驱动，分别用于传输不同类型的数据信息。
图3为一实施例的USB有线传屏的方法的详细流程图；参考图3，传屏设备检测到USB接口C有来自显示源设备的信息，检测传输该信息的通信协议端口，若为用于传输回传请求的端口，则将该信息识别为回传请求指令；将所述回传请求指令通过USB接口B转发至显示设备，以使显示设备返回其检测到操控信号。具体的，传屏设备需执行的步骤如下：
S101，传屏设备处理器程序开始运行后，通过USB接口C模拟成一个虚拟USB声卡，该虚拟USB声卡能够被安装有通用驱动的显示源设备能免驱识别。
S102，检测USB接口C是否有符合要求的显示源设备接入；
检测USB接口C是否有设备连接，若有，再进一步检测所述设备是否为符合要求的显示源设备。若是符合要求的显示源设备，则通过所述虚拟声卡的端口指示所述显示源设备将其系统声音切换至本端模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备。
S103，检测USB接口B是否有符合要求的显示设备接入；
检测USB接口B是否有设备连接，若有，再进一步检测所述设备是否为符合要求的显示设备。
可以理解的是，步骤S102、S103的执行顺序不限于图中示例，也可先执行步骤S103，再执行步骤S102；或者两部分同时执行。
S104，生成连接成功指令，确认传屏连接成功；
本实施例中将所述连接成功指令适配到用于传输连接信息的端口，并通过USB接口C发送至第一设备；同时，基于与显示设备预定的协议规则，通过USB接口B向显示设备发出连接成功指令。
S105，检测USB接口C是否有来自显示源设备音视频文件流；
本实施例中，传屏设备检测到USB接口C有来自显示源设备的信息后，进一步检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则可将该信息识别为音视频数据。
本实施例中，传屏设备还向显示源设备提供用于访问存储空间的端口。在本步骤之前，若传屏设备检测到USB接口C有来自显示源设备的信息后，进一步检测传输该信息的通信协议端口，若为用于访问存储空间的端口，则将该信息识别为存储空间访问指令，传屏设备将预设存储空间的内容信息展示给显示源设备，使得显示源设备系统接口可通过运行所述存储空间的程序用于截获显示源设备播放的画面和音频。传屏设备的存储空间中存储有用于截获音视频数据的exe可执行程序，或者存储相应程序的下载信息。因此所述显示源设备通过访问传屏设备的存储空间的信息，用于实现对其当前播放的画面或者音频进行截获。
S106，将USB接口C接收到的音视频文件流通过USB接口B转发至显示设备。
本实施例中，传屏设备接收到的音视频数据后，根据其采用的通信协议端口可识别接收到的是音视频数据，直接通过USB接口B转发至第二设备。
作为一优选实施方式，传屏设备识别出接收到的是音视频数据之后，还会监听是否有预设的用于指示信息转发的触发控制信号，若监听到所述触发控制信号，则将所述音视频数据通过USB接口B转发至第二设备。其中，所述触发控制信号可以是传屏设备的预设按钮被按下的操作信号，也可以是传屏设备提供的人机交互界面上发生的特定触摸操控信号，即用户可通过硬件触发方式/软件触发方式，来控制传屏设备对音视频数据的转发，以灵活控制传屏展示的效果。
S107，检测USB接口C是否有来自显示源设备的回传请求指令；
本实施例中，若传屏设备检测到USB接口C有来自显示源设备的信息，检测传输该信息的通信协议端口，若为用于传输回传请求的端口，则可将该信息识别为回传请求指令。
S108，将收到的回传请求指令通过USB接口B转发至显示设备。
可以理解的是，上述对音视频数据转发的触发机制，也适用于触发传屏设备对回传请求指令的转发，即还可通过硬件触发方式/软件触发方式，来控制传屏设备对回传请求指令的转发。
本实施例中，传屏设备根据其与显示设备约定的协议规则将收到回传请求指令通过USB接口B发送至显示设备。
可以理解的是，步骤S105和S106、步骤S107和S108的执行顺序不限于图中示例，也可先执行步骤S107和S108，再执行步骤S105和S106；或者两部分均按照各自设定的时间间隔并行执行。
S109，检测USB接口B是否有来自显示设备的操控信号；
本实施例中，传屏设备可根据其与显示设备约定的协议规则检测USB接口B收到的来自显示设备的信息是否为操控信号。
S110，将所述操控信号适配到传屏设备为显示源设备提供的、用于传输控制信息的对应端口，并通过 USB接口C发送至显示源设备，使得显示源设备执行与所述操控信号相应的动作，由此实现了在显示设备端操控显示源设备的效果。
可以理解的是，上述对音视频数据转发的触发机制，也适用于触发传屏设备对操控信号的转发，即还可通过硬件触发方式/软件触发方式，来控制传屏设备对操控信号的转发，以灵活控制远端操控的效果。
本实施例的有线传屏方法，通过预先模拟虚拟USB声卡和标准的USB设备，通过所述虚拟声卡的端口指示显示源设备将其系统声音切换至本端模拟的虚拟声卡，由此使得显示源设备不会发声，且不会引发显示源设备的声音异常，进而克服了显示源端和显示设备端同时发声的干扰问题；通过模拟的标准USB设备为显示源设备提供所需的若干通信协议端口，以通过该模拟的USB设备建立显示源设备和显示设备的有线传屏连接；当检测到模拟的USB设备的第一USB接口有来自显示源设备的信息时，检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则将该信息识别为音视频数据；将所述音视频数据通过本端的第二USB接口转发至显示设备，以在所述显示设备播放对应的音视频；当检测到模拟的USB设备的第二USB接口有来自显示设备的操控信号时，则将所述操控信号适配到用于传输操控信号的端口，并通过第一USB接口发送至显示源设备，以使显示源设备执行与所述操控信号相应的动作，由此实现了在显示设备端操控显示源设备的效果。基于模拟USB设备，显示源设备和显示设备均只需一条连接线便可实现音视频数据的传屏展示，同时还能实现显示设备操控信号的回传，简化了传屏显示的布线，降低对用户接线难度。
图4为第二实施例的USB有线传屏的方法的示意性流程图；本实施例可应用于显示源设备。如图4所示，本实施例USB有线传屏的方法包括步骤如下。
步骤S21、通过第一设备(显示源设备)预安装的通用驱动识别当前接入的USB设备(传屏设备)提供的通信协议端口，所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和模拟的虚拟声卡的端口；所述USB设备设置有第一USB接口，所述USB设备通过所述第一USB接口连接第一设备USB接口，并通过所述第一USB接口提供若干能够被第一设备的通用驱动识别的通信协议端口；
本实施例中传屏设备的USB接口C与显示源设备的USB接口D对接，所述USB接口D的属性为USB host；显示源设备指的是用作显示源的设备，。
步骤S22、通过识别出的虚拟声卡的端口将第一设备的系统声音切换至所述USB设备模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
本实施例中显示源设备预安装的通用驱动能够自动识别所述USB设备模拟的虚拟声卡，并在识别到所述虚拟声卡后，通过所述USB设备提供的虚拟声卡的端口指示显示源设备将其系统声音切换至本端模拟的虚拟声卡，由此使得显示源设备不会发声，且不会引发显示源设备的声音异常。
步骤S23、截获第一设备播放的画面和音频；将截获到的音视频数据通过第一设备的USB接口发送至所述USB设备的第一USB接口。
本实施例中，所述通信协议端口还包括：用于访问存储空间的端口。截获显示源设备播放的画面和音频的方式可为：通过运行传屏设备中存储的程序实现，具体例如：根据显示源设备用户操作生成存储空间访问指令，将所述访问指令适配到用于访问存储空间的端口，并发送至所述USB设备的USB接口C，以 访问所述USB设备的预设存储空间，并通过显示源设备的系统接口运行所述预设存储空间的程序用于截获显示源设备播放的画面和音频。由此，无需在显示源设备预先安装对应的程序，为用户提供了方便。
优选的，还可通过显示源设备的系统接口运行所述USB设备的预设存储空间的程序对截获到的音视频数据进行压缩和/或编码处理，以方便传输。
需要说明的是，上述步骤S22和S23的执行顺序不限于上述顺序，两部分的执行顺序可调换，或者也可同时执行。
作为一优选实施方式，所述通信协议端口还包括用于传输操控信号的端口；对应的，所述USB有线传屏的方法还包括步骤：显示源设备接收来自该USB设备的第一USB接口的信息，检测传输该信息的通信协议端口；若为用于传输操控信号的端口，则将该信息识别为操控信号，使显示源设备执行与所述操控信号相应的动作。
优选的，显示源设备用户可根据实际需要选择是否需要开启操控信号回传功能，若需要，则可在连接建立成功之后，通过传屏设备向显示设备发送回传请求，对应的，所述通信协议端口还包括：用于传输回传请求的端口。具体方式例如：获取显示源设备预设的回传请求标识位信息，根据回传请求标识位信息确定显示源设备的回传请求功能是否为开启状态；若是，则生成回传请求指令；将所述回传请求指令适配到用于传输回传请求的端口，并发送至传屏设备的USB接口C，通过传屏设备的USB接口B发送至显示设备。
图5为第二实施例的USB有线传屏的方法的详细流程图；参考图5，显示源设备需执行的步骤如下：
S201，运行显示源设备的通用驱动程序，在系统后台检测是否有符合传屏设备特征的特定ID(PID/VID)的USB设备(即传屏设备)接入；
本实施例中所述传屏设备通过其与显示源设备连接的USB接口，虚拟模型成一个虚拟声卡，该虚拟声卡能够被显示源设备中预安装的通用驱动自动识别。
S202，若有，通过识别出的虚拟声卡的端口将显示源设备的系统声音切换至所述USB设备模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；并确认是否有收到传屏设备发送的连接成功指令；
本实施例中，显示源设备的通用驱动检测到显示源设备的USB接口D接收到的来自传屏设备的USB接口C的信息，检测传输该信息的通信协议端口，若为用于传输连接信息的端口，则根据信号内容可识别出该信息是否为连接成功指令。
S203，若收到，则对显示源设备当前播放的画面和/或音频截取，然后经过压缩或者编码成特定文件格式，然后发送给所连接的传屏设备；
优选的，可从传屏设备提供给显示源设备的通信协议端口中获取用于访问存储空间的端口；根据显示源端用户操作生成存储空间访问指令，将所述访问指令适配到所述用于访问存储空间的端口，并发送至传屏设备的USB接口C，以访问传屏设备的预设存储空间，并通过显示源设备的系统接口运行所述预设存储空间的程序用于截获显示源设备播放的画面和音频。由此，显示源设备无需预先安装对应的程序，为用户提供了方便。
还可通过显示源设备的系统接口运行传屏设备的预设存储空间的程序对音视频数据进行压缩和/或编码，以便于传输。因为截获代码是存储在传屏设备模拟的一个U盘中，因此在显示源设备在接入传屏设备之后，通过传屏设备USB接口预先模拟的USB通信协议端口可查看存储在传屏设备中的exe程序数据， 通过运行传屏设备中相关程序就可截获显示源设备当前播放的画面和/或音频(包括声音数据，还包括音量、声道等音频调节信息)。
S204，确认显示源设备的回传请求功能开关是否打开(使用者可选择打开或关闭)；
本实施例中，在连接成功之后，可通过读取显示源设备预设的回传请求标识位信息，确定显示源设备当前的回传请求功能是否为开启状态。
S205，若打开，则将回传请求指令发送给传屏设备；
若显示源设备当前的回传请求功能为开启状态，根据用户操作生成回传请求指令；从传屏设备提供给显示源设备的通信协议端口中获取用于传输回传请求的端口；并发送至传屏设备的USB接口C，通过传屏设备的USB接口B发送至显示设备。
S206，检测是否有接收到传屏设备的USB接口C回传的操控信号；
S207，若接收到传屏设备回传的操控信号，则执行对应的响应动作。
本实施例中，检测USB接口D接收来自传屏设备的USB接口C的信息，检测传输该信息的通信协议端口，若为用于传输操控信号的端口，则可按照常规的处理外接HID设备操控信号的方式，识别回传的操控信号，并使第一设备执行与所述操控信号相应的动作。
可以理解的是，步骤S204和S205、步骤S206～S207的执行顺序不限于图中示例，也可先执行步骤S206～S207，再执行步骤S204和S205；或者两部分均按照各自设定的时间间隔并行执行。
本实施例的有线传屏方法，通过预先模拟标准USB设备，通过模拟的USB设备的USB接口为显示源设备提供所需的若干通信协议端口，以通过该模拟的USB设备建立显示源设备和显示设备的有线传屏连接；降低了对显示源设备的要求，实现了即插即用，并显示源设备和显示设备均只需一条连接线便可实现音视频数据的传屏展示，同时还能实现显示设备操控信号的回传，实现了在显示设备端操控显示源设备的效果，简化了传屏显示的布线，降低对用户接线难度。
图6为第三实施例的USB有线传屏的方法的示意性流程图；本实施例可应用于显示设备。如图6所示，本实施例USB有线传屏的方法包括步骤如下。
S31、检测到第二设备USB接口有USB设备接入，识别该USB设备是否为符合要求的USB设备；所述USB设备设置有第二USB接口，所述USB设备通过所述第二USB接口接入第二设备USB接口；
本实施例中，检测到显示设备的USB接口A有USB设备接入，可根据该USB设备的PID和/或VID判断当前接入的是否为上述传屏设备。所述显示设备指的是用作展示音视频信息的设备，所述USB接口A的属性为USB host。所述USB设备通过其与显示源设备连接的USB接口，虚拟模型成一个虚拟声卡，该虚拟声卡能够被显示源设备中预安装的通用驱动自动识别。
S32、若为符合要求的USB设备，通过第二设备USB接口接收通过所述USB设备的第二USB接口转发的音视频数据，在第二设备播放相应的音视频；
优选的，在检测到显示设备的USB接口A有符合要求的传屏设备接入之后，还可生成连接响应信号，并发送至传屏设备的USB接口B，以告知传屏设备显示设备符合音视频传输显示的要求，传屏设备可根据该信息确认连接是否成功。
本实施例中，为了方便传输，在显示源端将音视频数据进行压缩和/或编码处理，对应的在显示设备还需对所述音视频数据进行对应的解压和/或解编处理，处理之后再在显示设备播放相应的画面和/或音频。
S33、获取第二设备检测到的对第一设备的操控信号，并将所述操控信号发送至所述USB设备的第二USB接口，以通过所述USB设备的第一USB接口返回第一设备，指示所述第一设备在接收到所述操控信号后执行与所述操控信号相应的动作；
本实施例中所述操控信号的类型可包括：触摸控制信号、红外遥控信号或者鼠标/键盘控制信号；所述操控信号相应的动作可以是能在显示源设备端执行的任意动作。
图7为第三实施例的USB有线传屏的方法的详细流程图；参考图7，显示设备需执行的步骤如下：
S301，显示设备系统程序运行后，会检测是否有特定ID的USB设备(即传屏设备)接入。
本实施例中，此ID为程序里预先设置的传屏设备的USB ID(PID或VID)；因此即检测所述传屏设备是否接入显示设备的USB接口A。
S302，若检测到传屏设备接入，则通过USB接口A发出指定格式数据信息，告知传屏设备本端符合音视频传输显示的要求；
本实施例中，所述传屏设备通过其与显示源设备连接的USB接口，虚拟模型成一个虚拟声卡，该虚拟声卡能够被显示源设备中预安装的通用驱动自动识别。
S303，检测传屏设备的USB接口B是否有音视频文件流传输过来；
由于显示设备可以使定制的终端，因此可自动识别传屏设备的USB接口B传输过来的信号类型。即显示设备可识别传屏设备发送过来的是音视频数据，还是回传请求指令，或者是连接成功的指令。
本实施例中，所述音视频文件流为经过压缩和编码处理的数据。
S304，若接收到由传屏设备传输的音视频文件流，经过解压或解码得到音视频数据，进而输出对应的画面和音频，实现显示设备与显示源设备的传屏显示。
优选的，显示设备还可回复预设消息到传屏设备，通过传屏设备预先模拟的通信协议端口转发到显示源设备，以通知显示源设备传屏显示成功。
S305，检测传屏设备的USB接口B是否有控制信号回传请求传输过来；
本实施例中，显示设备可检测来自传屏设备的USB接口B的信息，识别该信息识别是否为回传请求指令。
S306，若检测到控制信号回传请求，则获取本端检测到的对显示源设备的操控信号，并将所述操控信号发送至传屏设备。
显示设备通过运行预设的程序，获取本端检测到的用于操控显示源设备的操控信号，信号类型包括但不限于触摸控制信号、红外遥控信号或者鼠标/键盘控制信号。
通过上述实施例的USB有线传屏的方法，传屏设备通过其USB接口可模拟成若干类型的USB设备，使得显示源设备可免特殊驱动识别。传屏设备还会从显示设备得到操控信号的数据流，并适配到其提供给显示源设备的对应端口进行传输；截获音视频数据的代码是显示源设备的系统接口，但是对应的exe程序数据可保存在传屏设备模拟的一个U盘中。传屏设备还模拟成USB存储设备，存储有用于数据通信和截获显示源设备音视频数据的程序数据或者程序下载器。在显示源设备与传屏设备建立USB连接之后，可访问传屏设备模拟的USB存储设备，以运行对应的exe程序数据用于对显示源设备的画面或者音频进行截获。显示源设备还可通过运行传屏设备中存储的相应exe程序数据将音视频数据按照约定的协议打包，通过传屏设备提供给显示源设备的对应通信协议端口传送至传屏设备，传屏设备从USB接口C收到数据包，不 改变包内容，直接通过USB接口B转发到显示设备。显示设备收到数据包，解析协议和包内容，再解码音视频数据进行播放。
显示设备软件还可以获取用户通过显示设备对显示源设备的触摸操作信号(或者其他类型的操控信号)，通过USB接口A回传给传屏设备，传屏设备将操作信号适配到对应的通信协议端口，进而提交给显示源设备进行执行。显示源设备会根据传屏设备的USB接口C提供的对应通信协议端口，识别传过来的触摸操作信号，并转换为操控事件(触摸操作信号转换为触摸事件这个过程是显示源设备的操作系统支持的，WINDOWS/MAC均有此功能)，由此使显示源设备执行与所述操控信号相应的动作。
需要说明的是，对于前述的各方法实施例，为了简便描述，将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本发明并不受所描述的动作顺序的限制，因为依据本发明，某些步骤可以采用其它顺序或者同时进行。
基于与上述实施例中的USB有线传屏的方法相同的思想，本发明还提供USB有线传屏的装置及系统，装置及系统可用于执行上述USB有线传屏的方法。为了便于说明，USB有线传屏的装置及系统实施例的结构示意图中，仅仅示出了与本发明实施例相关的部分，本领域技术人员可以理解，图示结构并不构成对装置及系统的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
图8为本发明一实施例的USB有线传屏的装置的示意性结构图，如图8所示，本实施例的USB有线传屏的装置包括：端口模拟模块510、连接建立模块520、虚拟声卡模块530以及音视频数据转发模块540，各模块详述如下：
所述端口模拟模块510，用于通过本端的第一USB接口向第一设备提供若干通信协议端口，所述通信协议端口能够被第一设备的通用驱动识别，所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和模拟的虚拟声卡的端口；
所述连接建立模块520，用于通过所述通信协议端口、所述第一USB接口建立本端与所述第一设备的USB通信连接；
所述虚拟声卡模块530，用于通过所述虚拟声卡的端口指示所述第一设备将其系统声音切换至本端模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
所述音视频数据转发模块540，用于检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则将该信息识别为音视频数据；将所述音视频数据通过本端的第二USB接口转发至第二设备，指示所述第二设备在接收到所述音视频数据后播放对应的音视频。
作为一优选实施方式，所述音视频数据转发模块540将该信息识别为音视频数据之后，还监听是否有预设的用于指示信息转发的触发控制信号，若监听到预设的用于指示信息转发的触发控制信号，将所述音视频数据通过本端的第二USB接口转发至第二设备。所述触发控制信号包括预设的控制按钮被按下的操作信号，还可包括通过预设人机交互界面监听到的触摸控制信号。由此方便用户灵活控制传屏展示的效果。
优选的，所述通信协议端口还包括：用于传输连接信息的端口；对应的，所述的USB有线传屏的装置还包括连接确认模块(图中未示出)，用于生成连接成功指令，将所述连接成功指令适配到用于传输连接信息的端口，并通过第一USB接口发送至第一设备。
作为一优选实施方式，所述通信协议端口还包括用于传输操控信号的端口；对应的，所述USB有线传屏的装置还包括：
所述操控信号回传模块550，用于检测到第二USB接口有来自第二设备的操控信号，则将所述操控信号适配到用于传输操控信号的端口，并通过第一USB接口发送至第一设备，指示所述第一设备在接收到所述操控信号后执行与所述操控信号相应的动作。
优选的，所述通信协议端口还包括：用于传输回传请求的端口；对应的，所述的USB有线传屏的装置还包括回传请求模块(图中未示出)，用于检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于传输回传请求的端口，则将该信息识别为回传请求指令；将所述回传请求指令通过第二USB接口转发至第二设备，指示第二设备返回其检测到的对第一设备的操控信号。
优选的，所述通信协议端口还包括：用于访问存储空间的端口；对应的，所述的USB有线传屏的装置还包括存储模块560，用于检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于访问存储空间的端口，则将该信息识别为存储空间访问指令；将预设存储空间展示给第一设备，使得第一设备的系统接口通过运行所述存储空间的程序截获第一设备播放的画面和音频。
本实施例中，第一USB接口、第二USB接口的属性均为USB device；所述第一设备为显示源设备，所述第二设备为显示设备。
图9为第二实施例的USB有线传屏的装置的示意性结构图。如图9所示，本实施例的USB有线传屏的装置包括：
USB识别模块610，用于通过预安装的通用驱动识别接入第一设备USB接口的USB设备提供的通信协议端口，所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和模拟的虚拟声卡的端口；所述USB设备设置有第一USB接口，所述USB设备通过所述第一USB接口接入第一设备USB接口，并通过所述第一USB接口提供若干能够被第一设备的通用驱动识别的通信协议端口；
声音切换模块620，用于通过识别出的虚拟声卡的端口将第一设备的系统声音切换至所述USB设备模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
音视频截获模块630，用于截获第一设备播放的画面和音频；
以及，音视频发送模块640，用于通过第一设备的USB接口的指定端口发送至所述USB设备的第一USB接口，所述指定端口与用于传输音视频数据的端口相适应。
优选的，所述通信协议端口还包括用于传输操控信号的端口；对应的，所述USB有线传屏的装置还包括：
操控信号接收模块650，用于接收来自该USB设备的第一USB接口的信息，检测传输该信息的通信协议端口；若为用于传输操控信号的端口，则将该信息识别为操控信号，使第一设备执行与所述操控信号相应的动作。
优选的，所述通信协议端口还包括：用于访问存储空间的端口；对应的，所述音视频截获模块630：具体用于将生成的访问指令适配到用于访问存储空间的端口，并通过第一设备的USB接口发送至所述USB设备的第一USB接口，以访问所述USB设备的预设存储空间，并通过第一设备系统接口运行所述预设存储空间的程序用于截获第一设备播放的画面和音频。
本实施例中，所述第一设备为显示源设备；所述第一USB接口的属性为USB device。
图10为第三实施例的USB有线传屏的装置的示意性结构图。如图10所示，本实施例的USB有线传 屏的装置包括：
USB接入检测模块710，用于检测到第二设备USB接口有USB设备接入，识别该USB设备是否为符合要求的USB设备；所述USB设备设置有第二USB接口，所述USB设备通过所述第二USB接口接入第二设备USB接口；
本实施例中，所述USB设备通过其与显示源设备连接的USB接口，虚拟模型成一个虚拟声卡，该虚拟声卡能够被显示源设备中预安装的通用驱动自动识别。
音视频数据接收模块720，用于若为符合要求的USB设备，通过第二设备USB接口接收通过所述USB设备的第二USB接口转发的音视频数据，在第二设备播放相应的音视频；
以及，操控信号发送模块730，用于获取第二设备检测到的对第一设备的操控信号，并将所述操控信号发送至所述USB设备的第二USB接口，以通过所述USB设备的第一USB接口返回第一设备，指示所述第一设备在接收到所述操控信号后执行与所述操控信号相应的动作。
本实施例中，所述第二设备为显示设备，所述第二USB接口的属性为USB device。
需要说明的是，上述示例的USB有线传屏的装置的实施方式中，各模块/单元之间的信息交互、执行过程等内容，由于与本发明前述方法实施例基于同一构思，其带来的技术效果与本发明前述方法实施例相同，具体内容可参见本发明方法实施例中的叙述，此处不再赘述。
此外，上述示例的USB有线传屏的装置的实施方式中，各功能模块的逻辑划分仅是举例说明，实际应用中可以根据需要，例如出于相应硬件的配置要求或者软件的实现的便利考虑，将上述功能分配由不同的功能模块完成，即将所述USB有线传屏的装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。其中各功能模既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
本领域普通技术人员可以理解，实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，作为独立的产品销售或使用。所述程序在执行时，可执行如上述各方法的实施例的全部或部分步骤。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其它实施例的相关描述。可以理解，其中所使用的术语“第一”、“第二”等在本文中用于区分对象，但这些对象不受这些术语限制。
以上所述实施例仅表达了本发明的几种实施方式，不能理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (23)

  1. 一种USB有线传屏的方法，其特征在于，包括：
    通过本端的第一USB接口向第一设备提供若干通信协议端口，所述通信协议端口能够被第一设备的通用驱动识别；所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和虚拟声卡的端口；
    通过所述通信协议端口、所述第一USB接口建立本端与所述第一设备的USB通信连接；
    通过所述虚拟声卡的端口指示所述第一设备将其系统声音切换至本端模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
    检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则将该信息识别为音视频数据；将所述音视频数据通过本端的第二USB接口转发至第二设备，指示所述第二设备在接收到所述音视频数据后播放对应的音视频。
  2. 根据权利要求1所述的USB有线传屏的方法，其特征在于，所述通信协议端口还包括用于传输操控信号的端口；
    通过所述通信协议端口、所述第一USB接口建立本端与所述第一设备的USB通信连接之后还包括：
    检测到第二USB接口有来自第二设备的操控信号，将所述操控信号适配到用于传输操控信号的端口，并通过第一USB接口发送至第一设备，指示所述第一设备在接收到所述操控信号后执行与所述操控信号相应的动作。
  3. 根据权利要求1所述的USB有线传屏的方法，其特征在于，所述通信协议端口还包括：用于传输连接信息的端口；
    通过所述通信协议端口、所述第一USB接口建立本端与所述第一设备的USB通信连接之后还包括：
    生成连接成功指令，将所述连接成功指令适配到用于传输连接信息的端口，并通过第一USB接口发送至第一设备。
  4. 根据权利要求1所述的USB有线传屏的方法，其特征在于，所述通信协议端口还包括：用于传输回传请求的端口；
    检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口之后还包括：
    若为用于传输回传请求的端口，则将该信息识别为回传请求指令；将所述回传请求指令通过第二USB接口转发至第二设备，指示第二设备返回其检测到的对第一设备的操控信号。
  5. 根据权利要求1所述的USB有线传屏的方法，其特征在于，所述通信协议端口还包括：用于访问存储空间的端口；
    检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口之后还包括：
    若为用于访问存储空间的端口，则将该信息识别为存储空间访问指令；将预设存储空间展示给第一设备，使得第一设备的系统接口通过运行所述存储空间的程序截获第一设备播放的画面和音频。
  6. 根据权利要求1所述的USB有线传屏的方法，其特征在于，所述将所述音视频数据通过本端的第二USB接口转发至第二设备的步骤包括：
    若监听到预设的用于指示信息转发的触发控制信号，将所述音视频数据通过本端的第二USB接口转发至第二设备。
  7. 根据权利要求1至6任一所述的USB有线传屏的方法，其特征在于，第一USB接口、第二USB接口的属性均为USB device；
    第一设备为显示源设备，第二设备为显示设备。
  8. 一种USB有线传屏的方法，其特征在于，包括：
    通过预安装的通用驱动识别接入第一设备USB接口的USB设备提供的通信协议端口；所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和模拟的虚拟声卡的端口；所述USB设备设置有第一USB接口，所述USB设备通过所述第一USB接口接入第一设备USB接口，并通过所述第一USB接口提供若干能够被第一设备的通用驱动识别的通信协议端口；
    通过识别出的虚拟声卡的端口将第一设备的系统声音切换至所述USB设备模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
    截获第一设备播放的画面和音频；将截获到的音视频数据通过第一设备的USB接口发送至所述USB设备的第一USB接口。
  9. 根据权利要求8所述的USB有线传屏的方法，其特征在于，所述通信协议端口还包括用于传输操控信号的端口；
    在通过预安装的通用驱动识别接入第一设备USB接口的USB设备提供的通信协议端口之后，还包括：
    通过第一设备USB接口接收来自所述USB设备的第一USB接口的信息，检测传输该信息的通信协议端口；若为用于传输操控信号的端口，则将该信息识别为操控信号，控制第一设备执行与所述操控信号相应的动作。
  10. 根据权利要求8所述的USB有线传屏的方法，其特征在于，所述通信协议端口还包括：用于访问存储空间的端口；
    所述截获第一设备播放的画面和音频的步骤包括：
    将生成的访问指令适配到用于访问存储空间的端口，并通过第一设备USB接口发送至所述USB设备的第一USB接口，以访问所述USB设备的预设存储空间，并通过第一设备系统接口运行所述预设存储空间的程序以截获第一设备播放的画面和音频。
  11. 根据权利要求8所述的USB有线传屏的方法，其特征在于，所述通信协议端口还包括：用于传输回传请求的端口；
    在通过预安装的通用驱动识别接入第一设备USB接口的USB设备提供的通信协议端口之后，还包括：
    获取第一设备预设的回传请求标识位信息，根据回传请求标识位信息确定第一设备的回传请求功能是否为开启状态；若是，生成回传请求指令；
    将所述回传请求指令适配到用于传输回传请求的端口，并通过第一设备USB接口发送至所述USB设备。
  12. 根据权利要求10所述的USB有线传屏的方法，其特征在于，将截获到的音视频数据适配到该通信协议端口之前还包括：
    通过第一设备系统接口运行所述USB设备的预设存储空间的程序对截获到的音视频数据进行压缩和/或编码处理。
  13. 根据权利要求8至12任一所述的USB有线传屏的方法，其特征在于，第一设备为显示源设备，第一设备USB接口的属性为USB host；所述第一USB接口的属性为USB device。
  14. 一种USB有线传屏的装置，其特征在于，包括：
    端口模拟模块，用于通过本端的第一USB接口向第一设备提供若干通信协议端口，所述通信协议端口能够被第一设备的通用驱动识别，所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和虚拟声卡的端口；
    连接建立模块，用于通过所述通信协议端口、所述第一USB接口建立本端与所述第一设备的USB通信连接；
    虚拟声卡模块，用于通过所述虚拟声卡的端口指示所述第一设备将其系统声音切换至本端模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
    音视频数据转发模块，用于检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口，若为用于传输音视频数据的端口，则将该信息识别为音视频数据；将所述音视频数据通过本端的第二USB接口转发至第二设备，指示所述第二设备在接收到所述音视频数据后播放对应的音视频。
  15. 根据权利要求14所述的USB有线传屏的装置，其特征在于，所述通信协议端口还包括用于传输操控信号的端口；
    所述USB有线传屏的装置还包括：
    操控信号回传模块，用于若检测到第二USB接口有来自第二设备的操控信号，则将所述操控信号适配到用于传输操控信号的端口，并通过第一USB接口发送至第一设备，指示所述第一设备在接收到所述操控信号后执行与所述操控信号相应的动作。
  16. 根据权利要求14所述的USB有线传屏的装置，其特征在于，所述通信协议端口还包括：用于传输连接信息的端口；
    所述的USB有线传屏的装置还包括:
    连接确认模块，用于生成连接成功指令，将所述连接成功指令适配到用于传输连接信息的端口，并通过第一USB接口发送至第一设备。
  17. 根据权利要求14所述的USB有线传屏的装置，其特征在于，所述通信协议端口还包括：用于传输回传请求的端口；
    所述的USB有线传屏的装置还包括：
    回传请求模块，用于检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口；若为用于传输回传请求的端口，将该信息识别为回传请求指令；将所述回传请求指令通过第二USB接口转发至第二设备，指示第二设备返回其检测到的对第一设备的操控信号。
  18. 根据权利要求14所述的USB有线传屏的装置，其特征在于，所述通信协议端口还包括：用于访问存储空间的端口；
    所述的USB有线传屏的装置还包括：
    所述存储模块，用于检测到第一USB接口有来自第一设备的信息，检测传输该信息的通信协议端口；若为用于访问存储空间的端口，则将该信息识别为存储空间访问指令；将预设存储空间展示给第一设备，使得第一设备系统接口通过运行所述存储空间的程序用于截获第一设备播放的画面和音频。
  19. 根据权利要求14至18任一所述的USB有线传屏的装置，其特征在于，第一USB接口、第二USB接口的属性均为USB device；
    第一设备为显示源设备，第二设备为显示设备
  20. 一种USB有线传屏的装置，其特征在于，包括：
    USB识别模块，用于通过预安装的通用驱动识别接入第一设备USB接口的USB设备提供的通信协议端口；所述通用驱动提供了第一设备和标准USB设备之间通信的通用通信协议，所述通信协议端口至少包括：用于传输音视频数据的端口和模拟的虚拟声卡的端口；所述USB设备设置有第一USB接口，所述USB设备通过所述第一USB接口接入第一设备USB接口，并通过所述第一USB接口提供若干能够被第一设备的通用驱动识别的通信协议端口；
    声音切换模块，用于通过识别出的虚拟声卡的端口将第一设备的系统声音切换至所述USB设备模拟的虚拟声卡，所述虚拟声卡未连接任何功放设备；
    音视频截获模块，用于截获第一设备播放的画面和音频；
    音视频发送模块，用于将截获到的音视频数据通过第一设备的USB接口发送至所述USB设备的第一USB接口。
  21. 根据权利要求20所述的USB有线传屏的装置，其特征在于，所述通信协议端口还包括用于传输操控信号的端口；
    所述USB有线传屏的装置还包括：
    操控信号接收模块，用于通过第一设备USB接口接收来自所述USB设备的第一USB接口的信息，检测传输该信息的通信协议端口；若为用于传输操控信号的端口，将该信息识别为操控信号，控制第一设备执行与所述操控信号相应的动作。
  22. 根据权利要求20所述的USB有线传屏的装置，其特征在于，所述通信协议端口还包括：用于访问存储空间的端口；
    所述音视频截获模块：用于将生成的访问指令适配到用于访问存储空间的端口，并通过第一设备USB接口发送至所述USB设备的第一USB接口，以访问所述USB设备的预设存储空间，并通过第一设备系统接口运行所述预设存储空间的程序以截获第一设备播放的画面和音频。
  23. 根据权利要求20至22任一所述的USB有线传屏的装置，其特征在于，
    第一设备为显示源设备，第一设备USB接口的属性为USB host；
    所述第一USB接口的属性为USB device。
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