WO2018090722A1

WO2018090722A1 - Method and apparatus for realizing wired screen delivery

Info

Publication number: WO2018090722A1
Application number: PCT/CN2017/103469
Authority: WO
Inventors: 庞远杨; 侯旻翔
Original assignee: 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
Priority date: 2016-10-12
Filing date: 2017-09-26
Publication date: 2018-05-24
Also published as: CN107948565B; CN107948565A

Abstract

The present invention relates to a method and apparatus for realizing wired screen delivery. The method comprises: providing, for a first device via a first USB interface of a local end, several communication protocol ports that can be recognized by a universal driver of the first device, and establishing a USB communication connection between the local end and the first device via the communication protocol ports and the first USB interface; when it is detected that there is information from the first device at the first USB interface, detecting a communication protocol port for transmitting the information, and if the port is a port for transmitting audio and video data, recognizing the information as the audio and video data; forwarding the audio and video data to a second device via a second USB interface of the local end; and when it is detected that there is a manipulation signal from the second device at the second USB interface, adapting the manipulation signal to a port for transmitting the manipulation signal, and sending same to the first device via the first USB interface. The present invention can simplify the wiring during screen delivery, and reduce the wiring difficulty of a user.

Description

Method and device for realizing wired screen transmission

Technical field

The present invention relates to the field of data transmission technologies, and in particular, to a method and apparatus for implementing wired transmission.

Background technique

The implementation of the screen is that the display source device such as a computer intercepts the screen page and sound data of the system and sends it to the display device, and the display device decodes and displays and plays the transmitted picture and sound. The screen is often used in conferences or teaching areas. Users need to project the audio and video signals of the computer to the large-screen LCD whiteboard or projector for display. The audio and video data on the computer is sent to the display device through the corresponding data line. However, in the traditional screen display mode, the display device only serves as an information display function, and does not have the function of receiving a user operation instruction and returning the display source end, and is inconvenient for the user to perform a demonstration operation.

Based on this, in the screen mode based on the touch screen display device, it is proposed to feed back the control signal of the first device detected by the display device to the computer end, and correspondingly, a need is added between the computer and the display device. A connection line for transmitting control signals. Therefore, two or more connection cables (HDMI cable + USB cable / RS232 cable, VGA cable + audio cable + USB cable or RS232 cable, etc.) are required between the computer and the display device. There is a problem that the wiring is complicated and the professional level of the user is high.

Summary of the invention

Based on this, the method and device for implementing wired screen transmission provided by the embodiments of the present invention can simplify the wiring during the screen display and reduce the difficulty of wiring the user.

An aspect of the present invention provides a method for implementing a wired screen, including:

Providing, by the first USB interface of the local end, a plurality of communication protocol ports to the first device, the communication protocol ports being identifiable by the universal drive of the first device; 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 for transmitting a control signal;

Establishing a USB communication connection between the local end and the first device by using the communication protocol port and the first USB interface;

Detecting that 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;

Detecting that the second USB interface has a control signal from the second device, adapting the control signal to a port for transmitting the control signal, and sending the first USB interface to the first device, indicating the first device An action corresponding to the manipulation signal is performed after receiving the manipulation signal.

Another aspect of the present invention provides a method for implementing wired screen transmission, including:

Identifying, by a pre-installed universal drive, a communication protocol port provided by a USB device that accesses the USB interface of the first device; the universal driver provides a universal communication protocol for communication between the first device and the standard USB device, the communication protocol port being at least The port includes: a port for transmitting audio and video data and a port for transmitting a control signal; the USB device is provided with a first USB interface, and the USB device passes The first 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 driving of the first device through the first USB interface;

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 a corresponding port of the USB interface of the first device, where the corresponding port is used for transmitting audio and video data Adapted to the port;

Receiving, by the first device USB interface, information from the first USB interface of the USB device, detecting a communication protocol port transmitting the information; if the port is for transmitting a control signal, identifying the information as a manipulation signal, and A device performs an action corresponding to the manipulation signal.

Detecting that the USB device of the second device has a USB device access, and identifying whether the USB device is a USB device that meets the requirements; the USB device is provided with a second USB interface, and the USB device is accessed through the second USB interface. Two device USB interface;

If the USB device meets the requirements, the audio and video data forwarded by the second USB interface of the USB device is received through the USB interface of the second device, and the corresponding audio and video is played on the second device;

Acquiring the control signal of the first device detected by the second device, and sending the control signal to the second USB interface of the USB device through the second device USB interface to return through the first USB interface of the USB device The first device instructs the first device to perform an action corresponding to the manipulation signal after receiving the manipulation signal.

Another aspect of the present invention provides an apparatus for implementing a wired screen, including:

a port simulation module, configured to provide, by the first USB interface of the local end, a plurality of communication protocol ports to the first device, where the communication protocol port can be recognized by the universal driver of the first device; the universal driver 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 transmitting a control signal;

a connection establishing module, 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 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;

The control signal returning module 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 first to the first USB interface And the device instructing the first device to perform an action corresponding to the control signal after receiving the control signal.

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 USB interface of the first device, the universal driver providing 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 for transmitting a control signal; 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;

An audio and video intercepting module, configured to intercept a picture and audio played by the first device;

And an audio and video sending module, configured to send the intercepted audio and video data to a first USB interface of the USB device through a corresponding port of the USB interface of the first device, where the corresponding port is adapted to be a port for transmitting audio and video data ;

The control signal receiving module is configured to receive information from the first USB interface of the USB device through the first device USB interface, and detect a communication protocol port that transmits the information; if the port is used to transmit the control signal, the information is It is recognized as a manipulation signal, and causes the first device to perform an action corresponding to the manipulation signal.

The USB access detection module 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 requirement; the USB device is provided with a second USB interface, and the USB device passes through the device. The second USB interface is connected to the USB interface of the second device;

The audio and video data receiving module is configured to receive, by the second device, the audio and video data forwarded by the second USB interface of the USB device, and play the corresponding audio and video on the second device, if the USB device meets the requirements;

The control signal sending module is configured to acquire a control signal for the second device, and send the control signal to the second USB interface of the USB device through the second device USB interface to pass the first USB interface of the USB device Returning to the first device, causing the first device to perform an action corresponding to the manipulation signal.

In the above technical solution, by pre-simulating a standard USB device, the display source device is provided with a plurality of communication protocol ports required by the USB interface of the simulated USB device, so as to establish a wired transmission screen of the display source device and the display device through the simulated USB device. Connecting; when detecting that the first USB interface of the simulated USB device has information from the display source device, detecting a communication protocol port transmitting the information, if it is a port for transmitting audio and video data, identifying the information as a tone The video data is forwarded to the display device through the second USB interface of the local end to play the corresponding audio and video on the display device; when the second USB interface of the simulated USB device is detected from the display device When the signal is manipulated, 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 control signal, thereby realizing The effect of displaying the source device is manipulated on the display device side. 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.

DRAWINGS

1 is a schematic diagram of a system environment for implementing a method for implementing wired screen transmission according to the present invention;

2 is a schematic flowchart of a method for implementing wired screen transmission according to an embodiment;

3 is a detailed flowchart of a method for implementing wired screen transmission according to an embodiment;

4 is a schematic flowchart of a method for implementing wired screen transmission in a second embodiment;

5 is a detailed flowchart of a method for implementing a wired screen transmission by a display source device according to a second embodiment;

6 is a schematic flowchart of a method for implementing wired screen transmission in a third embodiment;

7 is a detailed flowchart of a method for implementing a wired screen display by a display device of a third embodiment;

FIG. 8 is a schematic structural diagram of an apparatus for implementing a wired screen according to an embodiment; FIG.

FIG. 9 is a schematic structural diagram of an apparatus for implementing wired screen transmission according to a second embodiment; FIG.

FIG. 10 is a schematic structural diagram of an apparatus for implementing wired screen transmission of the third embodiment.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 is a schematic diagram of a system environment for implementing a method for wired screen transmission of the present invention. As shown in FIG. 1, the system environment of the embodiment of the present invention includes a display source device (ie, a first device), a circuit A (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 circuit A 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. Circuit A can run an embedded operating system and connect to the display source device through USB interface C. USB interface B can be an ordinary USB interface for accessing display devices such as smart tablets (or other large-screen devices). Driven and identified by the system of the display device. Circuit A 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 circuit A 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. Circuit A can be powered directly through the USB interface of the display source device or the USB interface of the display device.

FIG. 2 is a schematic flowchart of a method for implementing wired screen transmission according to an embodiment of the present invention. In this embodiment, the method is applied to circuit A as an example. The circuit A includes a first USB interface and a second USB interface for accessing the display source device and the display device, respectively.

As shown in FIG. 2, the method for implementing wired screen transmission in this embodiment includes the following steps:

S11. 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. a universal communication protocol, the communication protocol port comprising at least a port for transmitting audio and video data and a port for transmitting a control signal;

In this embodiment, the first device is the display source device, and the local device refers to the circuit A. Circuit A can be modeled into several types of standard USB devices and provides a corresponding communication protocol port. The generic driver pre-installed by the display source device can independently drive different types of standard USB devices. Circuit A simulates a standard USB device that displays the source device to be recognized by the drive (ie, it can be identified by a universal drive, without the need for a specific universal drive).

In this embodiment, the USB interface is a physical concept, and 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. In this embodiment, the port identifiers of the communication protocol ports can be recognized by the universal USB driver, and the processor in the circuit A 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.

Correspondingly, circuit A can be simulated into several types of standard USB devices, which means that circuit A can enumerate several standard USB communication protocol ports based on the common standard USB communication protocol, and different USB communication protocol ports use different port identifications to distinguish .

S12. Establish a USB communication connection between the local end and the first device by using the communication protocol port and the first USB interface.

Preferably, the communication protocol port further includes: a port for transmitting connection information. After the circuit A confirms that the USB communication connection between the local end and the first device is established, 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.

S13, detecting that 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; The 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;

In this embodiment, the second device is a display device.

S14. The second USB interface is detected to have a control signal from the second device, and the control signal is adapted to a port for transmitting the control signal, and sent to the first device through the first USB interface, so that the first The device performs an action corresponding to the manipulation signal.

It should be noted that the 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 corresponding source software is installed in the display source device for receiving the user's screen operation. The communication protocol port further includes: a port for accessing the storage space. After the display source device is successfully connected to the circuit A, if the display source device is pre-installed with a software program for intercepting the currently displayed display screen and audio, the currently displayed display screen and audio are intercepted by the software program, and the packaged device is packaged. After processing, it is sent to circuit A (in which case circuit A is equivalent to an analog USB device); if the display source device does not have a software program for intercepting the currently displayed display screen and audio, access to circuit A's memory (storage space) Reading data stored in the memory of the circuit A or a software program for intercepting the currently displayed display screen and audio, and packaging the same (in this case, the circuit A is equivalent to an external USB flash drive), and then The packaged audio and video data is sent to circuit A (in this case circuit A 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 circuit A, and for the display source device (for example, a PC), the circuit A is inserted. At that time, I will see a "removable disk" in the "My Computer" root directory, which is the storage space of circuit A, thereby showing that the source device can run the pre-stored application from the "removable disk". In turn, the effect of plug and play is realized. After the audio and video data received by the circuit A from the USB interface C is forwarded to the display device through the USB interface B, the screen display of the audio and video data is realized.

On the other hand, the circuit A can also receive the control signal of the display device from the USB interface B, and the control device can transmit the control information based on the pre-determined port information, and after receiving the control signal of the display device, the circuit A Adapted to the transmission control letter The port of the number can thereby return the control signal of the display device to the display source device through the USB interface C, so that the display source device converts the manipulation signal into a corresponding manipulation event and performs a corresponding manipulation action. For example, circuit A 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. For the display source device system, the HID touch device is processed according to the conventional method. The way of touching events. 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.

Based on the circuit A described above, on the one hand, various types of USB communication protocol ports that are needed for the common display source device can be provided, and the display source device can be freely recognized by the drive, and can also complete the corresponding sound according to the data information stored in the circuit A. The video data capture function realizes the plug-and-play effect; based on the circuit A, 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.

It can be understood that the port for transmitting the connection information, the port for transmitting the audio and video information in the embodiment may be the HID1 port and the HID2 port, respectively, and the port for transmitting the storage space access instruction may be the Mass port. In other words, in the embodiment, the circuit A can be simulated into a plurality of types of communication protocol ports that can be recognized by the display source terminal by the USB interface C according to actual needs, and can be independently driven by the universal drive of the display source terminal. , used to transmit different types of data information.

3 is a detailed flowchart of a method for implementing wired screen transmission according to an embodiment; referring to FIG. 3, circuit A detects that USB interface C has information from a display source device, and detects a communication protocol port for transmitting the information, if used for Transmitting the port of the return request, the information is identified as a backhaul request instruction; the backhaul request command is forwarded to the display device via the USB interface B to cause the display device to return to the detected control signal. Specifically, the steps that circuit A needs to perform are as follows:

S101, after the circuit A processor program starts running, the circuit A is simulated into a standard USB device through the USB interfaces B and C, so that the display source device with the universal driver can be driven to recognize it.

S102. Check whether the USB interface C has a display source device that meets the requirements;

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.

S103. Detect whether the USB interface B has a display device that meets the requirements;

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.

It can be understood that the execution order of steps S102 and S103 is 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.

S104. Generate a connection success instruction, and confirm that the screen connection is successful.

In this embodiment, the 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.

S105. Check whether the USB interface C has an audio and video file stream from the display source device.

In this embodiment, after detecting that the USB interface C has information from the display source device, the circuit A further detects the communication protocol port that transmits the information, and if it is a port for transmitting audio and video data, the information can be recognized as a tone. Video data.

In this embodiment, the circuit A also provides a port for accessing the storage space to the display source device. Before this step, if circuit A detects After the USB interface C has the information from the display source device, the communication protocol port for transmitting the information is further detected. If the port is used to access the storage space, the information is recognized as a storage space access command, and the circuit A stores the preset. The content information of the space is displayed to the display source device such that the display source device system interface can be used to intercept the picture and audio played by the display source device by running the program of the storage space. An exe executable program for intercepting audio and video data is stored in the storage space of the circuit A, or download information of the corresponding program is stored. Therefore, the display source device accesses the information of the storage space of the circuit A for intercepting the picture or audio currently played.

S106. Forward the audio and video file stream received by the USB interface C to the display device through the USB interface B.

In this embodiment, after the audio and video data received by the circuit A, the received audio and video data can be identified according to the communication protocol port used by the circuit A, and directly forwarded to the second device through the USB interface B.

As a preferred embodiment, after the circuit A 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 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 circuit A is pressed, or may be a specific touch control signal generated on the human-machine interaction interface provided by the circuit A, that is, the user may trigger through the hardware/software. The trigger mode is used to control the forwarding of the audio and video data by the circuit A, so as to flexibly control the effect of the screen display.

S107. Detect whether the USB interface C has a return request instruction from the display source device.

In this embodiment, if the circuit A detects that the USB interface C has information from the display source device, and detects a communication protocol port that transmits the information, if it is a port for transmitting a return request, the information may be identified as a backhaul. Request instruction.

S108. Forward the received backhaul request command to the display device through the USB interface B.

It can be understood that the above trigger mechanism for forwarding audio and video data is also applicable to the forwarding of the return request command by the trigger circuit A, that is, the circuit A can also control the return request command by the hardware trigger mode/software trigger mode. Forwarding.

In this embodiment, the circuit A sends a return request request to the display device via the USB interface B according to the protocol rule agreed with the display device.

It can be understood that the execution order of 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.

S109. Detect whether the USB interface B has a control signal from the display device.

In this embodiment, the circuit A 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.

S110, the control signal is adapted to a corresponding port provided by the circuit A for displaying the source device for transmitting control information, and sent to the display source device through the USB interface C, so that the display source device performs corresponding to the control signal. The action thus achieves the effect of manipulating the display source device on the display device side.

It can be understood that the above trigger mechanism for forwarding audio and video data is also applicable to the forwarding of the control signal by the trigger circuit A, that is, the hardware trigger mode/software trigger mode can also be used to control the forwarding of the control signal by the circuit A. Flexible control of multi-end control.

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 of the device Connecting; when detecting that the first USB interface of the simulated USB device has information from the display source device, detecting a communication protocol port transmitting the information, if it is a port for transmitting audio and video data, identifying the information as a tone The video data is forwarded to the display device through the second USB interface of the local end to play the corresponding audio and video on the display device; when the second USB interface of the simulated USB device is detected from the display device When the signal is manipulated, the manipulation signal is adapted to a port for transmitting the manipulation 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 The effect of manipulating the display source device on the display device side is realized. 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.

FIG. 4 is a schematic flowchart of a method for implementing wired screen transmission according to a second embodiment; the embodiment is applicable to a display source device. As shown in FIG. 4, the method for implementing wired screen 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 (circuit A), and the universal driver provides communication between the first device and the standard USB device. a universal communication protocol, the communication protocol port at least comprising: a port for transmitting audio and video data and a port for transmitting a control signal; 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;

In this embodiment, the USB interface C of the circuit A 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: 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 a corresponding port of the USB interface of the first device, where the corresponding port is used for transmission The port of the audio and video data is adapted;

In this embodiment, the communication protocol port further includes: a port for accessing the storage space. The manner of intercepting the screen and the audio played by the source device may be implemented by running a program stored in the circuit A, 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 access a port of the storage space, and sent to the USB interface C of the USB device to access a preset storage space of the USB device, and running the program of the preset storage space through a system interface of the display source device for intercepting the display The picture and audio played by the source device. Thereby, it is not necessary to pre-install the corresponding program on the display source device, which provides convenience for the user.

Preferably, 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.

Step S23: 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 The corresponding action of the manipulation signal.

It should be noted that the 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.

Preferably, the user of the display source device can select whether to turn on the control signal return function according to actual needs, and if necessary, send a backhaul request to the display device through the circuit A after the connection is successfully established, corresponding to the communication protocol. The port also includes: for transmission The port on which the request is returned. 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 sent to the USB interface C of the circuit A, and sent to the display device through the USB interface B of the circuit A.

FIG. 5 is a detailed flowchart of a method for implementing wired screen transmission in the second embodiment; referring to FIG. 5, the steps to be performed on 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, circuit A) having a specific ID (PID/VID) conforming to the feature of the circuit A is accessed;

S202, if yes, confirm whether there is a connection success instruction sent by the circuit A;

In this embodiment, the universal driving of the display source device detects the information of the USB interface C from the circuit A 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 for transmitting 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, the screen and/or audio currently displayed by the display source device is intercepted, then compressed or encoded into a specific file format, and then sent to the connected circuit A;

Preferably, the port for accessing the storage space is obtained from the communication protocol port provided by the circuit A 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 Accessing the port of the storage space and sending it to the USB interface C of the circuit A to access the preset storage space of the circuit A, and running the program of the preset storage space through the system interface of the display source device for intercepting the display source device to play Picture and audio. 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 preset memory space of circuit A of the system interface of the source device for transmission. Since the intercept code is stored in a U disk emulated by the circuit A, after the display source device is connected to the circuit A, the exe program data stored in the circuit A can be viewed through the USB communication protocol port pre-simulated by the circuit A USB interface. By running the relevant program in circuit A, 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.

S204, confirming whether the return request function switch of the display source device is turned on (the user can select to open or close);

In this embodiment, after the connection is successful, 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.

S205, if opened, sending a return request command to the circuit A;

If 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 circuit A to the display source device; and sending the circuit to the circuit USB interface C of A is sent to the display device through USB interface B of circuit A.

S206, detecting whether there is a control signal sent back by the USB interface C of the circuit A;

S207. If the control signal returned by the circuit A is received, the corresponding response action is performed.

In this embodiment, the USB interface D is detected to receive information from the USB interface C of the circuit A, and the communication protocol for transmitting the information is detected. The port, if it is a port for transmitting a control signal, can identify the returned control signal according to a conventional manner of processing the external HID device control signal, and cause the first device to perform an action corresponding to the control signal.

It can be understood that the execution order of 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 implementing wired screen transmission according to a third embodiment; the embodiment is applicable to a display device. As shown in FIG. 6, the method for implementing wired screen transmission in this embodiment includes the following steps.

S31. 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;

In this embodiment, it is detected that the USB interface A of the display device has a USB device access, and whether the current access is the circuit A is 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.

S32. 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;

Preferably, after detecting that the USB interface A of the display device has the required circuit A access, a connection response signal may also be generated and sent to the USB interface B of the circuit A to inform the circuit A that the display device conforms to the audio and video transmission display. According to the requirement, circuit A can confirm whether the connection is successful according to the information.

In this embodiment, in order to facilitate the transmission, 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.

S33. 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 return to the first device by using the first USB interface of the USB device. Instructing the first device to perform an action corresponding to the manipulation signal after receiving the manipulation signal;

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.

7 is a detailed flowchart of a method for implementing wired screen transmission in the third embodiment; referring to FIG. 7, the steps to be performed by the display device are as follows:

S301. After the display device system program runs, it detects whether a USB device with a specific ID (ie, circuit A) is accessed.

In this embodiment, the ID is the USB ID (PID or VID) of the circuit A preset in the program; therefore, it is detected whether the circuit A is connected to the USB interface A of the display device.

S302, if it is detected that the circuit A is connected, the specified format data information is sent through the USB interface A, and the circuit A is informed that the local end meets the requirements of the audio and video transmission display;

S303, detecting whether the audio interface file is transmitted by the USB interface B of the circuit A;

Since the display device can make a customized terminal, the type of signal transmitted by the USB interface B of the circuit A can be automatically recognized. That is, the display device can recognize whether the audio and video data is sent by the circuit A, or whether the request command is returned, or the connection is successful.

In this embodiment, the audio and video file stream is data subjected to compression and encoding processing.

S304. If the audio and video file stream transmitted by the circuit A 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.

Preferably, the display device can also reply to the preset message to the circuit A, and forward the communication protocol port pre-simulated by the circuit A to the display source device to notify the display source device that the screen display is successful.

S305, detecting whether the USB interface B of the circuit A has a control signal return request transmitted;

In this embodiment, the display device can detect information from the USB interface B of the circuit A, and identify whether the information identifies whether it is a return request command.

S306. If a control signal return request is detected, acquiring a control signal to the display source device detected by the local end, and sending the control signal to the circuit A.

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.

Through the method for implementing wired screen transmission in the above embodiment, the circuit A 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. Circuit A also obtains the 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 the system interface of the display source device, but the corresponding exe program data Can be saved in a USB flash drive emulated by circuit A. Circuit A is also modeled as a USB storage device that stores program data or program downloaders for data communication and interception of audio and video data of the display source device. After the display source device establishes a USB connection with the circuit A, the USB storage device simulated by the circuit A can be accessed to run the corresponding exe program data for intercepting the picture 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 circuit A, and transmit the corresponding communication protocol port provided by the circuit A to the display source device to the circuit A, and the circuit A is from the USB interface C. The data packet is received, and the content of the package is not changed, and is directly forwarded to the display device through the 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 return it to the circuit A through the USB interface A, and the circuit A adapts the operation signal to the corresponding communication protocol port. And submit 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 circuit A, and converts it into a manipulation event (the touch operation signal is converted into a touch event. This process is displayed by the operating system of the display source device. , WINDOWS/MAC has this function), thereby causing the display source device to perform an action corresponding to the manipulation signal.

It should be noted that, for the foregoing method embodiments, for the sake of brevity, they are all expressed as a series of action combinations, but Those skilled in the art will appreciate that the present invention is not limited by the described order of the acts, as some steps may be performed in other sequences or concurrently in accordance with the present invention.

Based on the same idea as the method for implementing wired screen transmission in the above embodiments, the present invention also provides an apparatus and system for implementing wired screen transmission, and the apparatus and system can be used to implement the above method for implementing wired screen transmission. For the convenience of the description, in the structural diagram of the device and the system embodiment for implementing the wired screen, only the parts related to the embodiment of the present invention are shown, and those skilled in the art can understand that 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 implementing a wired screen according to an embodiment of the present invention. As shown in FIG. 8, the apparatus for implementing a wired screen in this embodiment includes: a port simulation module 510, a connection establishment module 520, and a sound. The video data forwarding module 530 and the control signal returning 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 comprising at least a port for transmitting audio and video data and a port for transmitting a control signal;

The 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 audio and video data forwarding module 530 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. The audio and video data is forwarded to the second device through 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;

As a preferred embodiment, after the audio/video data forwarding module 530 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 control signal returning module 540 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.

Preferably, the communication protocol port further includes: a port for transmitting connection information; correspondingly, the device for implementing wired screen 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.

Preferably, the communication protocol port further includes: a port for transmitting a return request; correspondingly, the device for implementing the wired screen 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, causing the second device to return its detected control signal to the first device.

Preferably, the communication protocol port further includes: a port for accessing the storage space; correspondingly, the device for implementing the wired screen further includes a storage module 550, 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.

In this embodiment, 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.

FIG. 9 is a schematic structural diagram of an apparatus for implementing wired screen transmission of the second embodiment. As shown in FIG. 9, the apparatus for implementing wired screen transmission in 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 at least includes: a port for transmitting audio and video data and a port for transmitting a control signal; the USB device is provided with a first USB interface, and the USB device is accessed through the first USB interface a first device USB interface, and providing, by the first USB interface, a plurality of communication protocol ports that can be recognized by the universal drive of the first device;

The audio and video intercepting module 620 is configured to intercept the picture and audio played by the first device;

The audio and video sending module 630 is configured to send to the first USB interface of the USB device through a corresponding port of the USB interface of the first device, where the corresponding port is adapted to a port for transmitting audio and video data.

And a control signal receiving module 640, configured to receive information from the first USB interface of the USB device, to detect a communication protocol port that transmits the information; and if the port is used to transmit the control signal, identify the information as a control signal And causing the first device to perform an action corresponding to the manipulation signal.

Preferably, the communication protocol port further includes: a port for accessing the storage space; correspondingly, the audio and video intercepting module 620 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.

In this embodiment, 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 implementing wired screen transmission of the third embodiment. As shown in FIG. 10, the apparatus for implementing wired screen transmission in this embodiment 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 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;

And 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, The first device is configured to perform an action corresponding to the manipulation signal after receiving the manipulation signal.

In this embodiment, the second device is a display device, and the attribute of the second USB interface is a USB device.

It should be noted that, in the implementation of the device for implementing wired screen in the above example, the information interaction, the execution process, and the like between the modules/units are based on the same concept as the foregoing method embodiments of the present invention. The technical effects are the same as those of the foregoing method embodiments of the present invention. For details, refer to the description in the method embodiment of the present invention, and details are not described herein again.

In addition, in the implementation of the foregoing apparatus for implementing wired screen transmission, the logical division of each functional module is merely an example, and the actual application may be considered according to requirements, for example, for configuration requirements of corresponding hardware or convenience of implementation of software. The above-mentioned function allocation is completed by different function modules, that is, the internal structure of the device for implementing wired screen 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.

It will be understood by those skilled in the art that all or part of the processes in the above embodiments may be implemented by a computer program to instruct related hardware, and the program may be stored in a computer readable storage medium as Independent product sales or use. The program, when executed, may perform all or part of the steps of an embodiment of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

In the above embodiments, the descriptions of the various embodiments are all focused, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments. It will be understood that the terms "first", "second", and the like, as used herein, are used herein to distinguish an object, but these are not limited by these terms.

The above-described embodiments are merely illustrative of several embodiments of the invention and are not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A method for implementing wired screen transmission, comprising:

Providing, by the first USB interface of the local end, a plurality of communication protocol ports to the first device, the communication protocol ports being identifiable by the universal drive of the first device; 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 for transmitting a control signal;

Establishing a USB communication connection between the local end and the first device by using the communication protocol port and the first USB interface;

Detecting that 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;

Detecting that the second USB interface has a control signal from the second device, adapting the control signal to a port for transmitting the control signal, and sending the first USB device to the first device, indicating that the first device is The action corresponding to the manipulation signal is performed after receiving the manipulation signal.
The method for implementing wired screen transmission according to claim 1, wherein the communication protocol port further comprises: a port for transmitting connection information;

After the USB communication connection between the local device and the first device is established by using the communication protocol port and the first USB interface, the method further includes:

A connection success instruction is generated, the connection success instruction is adapted to a port for transmitting connection information, and sent to the first device through the first USB interface.
The method for implementing wired screen transmission according to claim 1, wherein the communication protocol port further comprises: a port for transmitting a backhaul request;

The first USB interface is detected to have information from the first device, and after detecting the communication protocol port for transmitting the information, the method further includes:

If the port is used for transmitting the backhaul request, the information is identified as a backhaul request instruction; the backhaul request command is forwarded to the second device through the second USB interface, so that the second device returns the detected pair The control signal of the first device.
The method for implementing wired screen transmission according to claim 1, wherein the communication protocol port further comprises: a port for accessing a storage space;

The first USB interface is detected to have information from the first device, and after detecting the communication protocol port for transmitting the information, the method further includes:

If the port is used to access the storage space, the information is identified as a storage space access instruction; the preset storage space is displayed to the first device, so that the system interface of the first device intercepts the first program by running the storage space The picture and audio played by the device.
The method for implementing a wired screen according to claim 1, wherein the step of forwarding the audio and video data to the second device through the second USB interface of the local end comprises:

If the preset trigger control signal for indicating information forwarding is monitored, the audio and video data is forwarded to the second device through the second USB interface of the local end.
The method for implementing wired screen transmission according to claim 5, wherein the trigger control signal comprises a preset control of the local end The operation signal that the button is pressed.
The method for implementing a wired screen according to any one of claims 1 to 6, wherein the attributes of the first USB interface and the second USB interface are both USB devices;

The first device is a display source device, and the second device is a display device.
A method for implementing wired screen transmission, comprising:

Identifying, by a pre-installed universal drive, a communication protocol port provided by a USB device that accesses the USB interface of the first device; the universal driver provides a universal communication protocol for communication between the first device and the standard USB device, the communication protocol port being at least The port includes: a port for transmitting audio and video data and a port for transmitting a control signal; the USB device is provided with a first USB interface, and the USB device accesses the first device USB interface through the first USB interface, and Providing, by the first USB interface, a plurality of communication protocol ports that can be recognized by the universal drive of the first 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 a corresponding port of the USB interface of the first device, where the corresponding port is used for transmitting audio and video data Adapted to the port;

Receiving, by the first device USB interface, information from the first USB interface of the USB device, detecting a communication protocol port transmitting the information; if it is a port for transmitting a control signal, identifying the information as a manipulation signal, and The first device performs an action corresponding to the manipulation signal.
The method for implementing a wired screen according to claim 8, wherein the communication protocol port further comprises: a port for accessing a storage space;

The step of intercepting the picture and audio played by the first device includes:

Adapting the generated access instruction to a port for accessing the storage space, and sending the first USB interface to the USB device through the first device USB interface to access the preset storage space of the USB device, and A device system interface runs the program of the preset storage space to intercept the picture and audio played by the first device.
The method for implementing wired screen transmission according to claim 8, wherein the communication protocol port further comprises: a port for transmitting a backhaul request;

After the communication protocol port provided by the USB device connected to the USB interface of the first device is identified by the pre-installed universal driver, the following further includes:

Obtaining a backhaul request identifier bit information preset by the first device, determining, according to the backhaul request identifier bit information, whether the backhaul request function of the first device is in an open state; if yes, generating a backhaul request instruction;

The backhaul request instruction is adapted to a port for transmitting a backhaul request and sent to the first USB interface of the USB device through the first device USB interface.
The method for implementing wired screen transmission according to claim 9, wherein before the intercepting the audio and video data to the communication protocol port, the method further comprises:

The intercepted audio and video data is compressed and/or encoded by a program that runs the preset storage space of the USB device through the first device system interface.
The method for implementing wired screen transmission according to any one of claims 8 to 11, wherein the first device is a display source device, The attribute of the first device USB interface is a USB host; the attribute of the first USB interface is a USB device.
A method for implementing wired screen transmission, comprising:

Detecting that the USB device of the second device has a USB device access, and identifying whether the USB device is a USB device that meets the requirements; the USB device is provided with a second USB interface, and the USB device is accessed through the second USB interface. Two device USB interface;

If the USB device meets the requirements, the audio and video data forwarded by the second USB interface of the USB device is received through the USB interface of the second device, and the corresponding audio and video is played on the second device;

Acquiring the detected control signal to the first device, sending the control signal to the second USB interface of the USB device through the second device USB interface, to return to the first device by using the first USB interface of the USB device And causing the first device to perform an action corresponding to the manipulation signal.
The method for implementing a wired screen according to claim 13, wherein after the USB device is identified as a compliant USB device, the method further comprises:

A connection response signal is generated and sent to the second USB interface of the USB device through the second device USB interface.
The method for implementing a wired screen according to claim 13, wherein after receiving the audio and video data forwarded by the second USB interface of the USB device through the second device USB interface, the method further includes:

The audio and video data is decompressed and/or decomposed.
The method for implementing wired screen transmission according to claim 13, wherein the type of the manipulation signal comprises: a touch control signal, an infrared remote control signal or a mouse/keyboard control signal.
A method for implementing wired screen transmission according to any one of claims 13 to 16, wherein

The second device is a display device, and the attribute of the second device USB interface is a USB host;

The attribute of the second USB interface is a USB device.
An apparatus for implementing wired screen transmission, comprising:

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 transmitting a control signal;

a connection establishing module, 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 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;

The control signal returning module 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 first to the first USB interface And the device instructing the first device to perform an action corresponding to the control signal after receiving the control signal.
The device for implementing wired screen transmission according to claim 18, wherein the communication protocol port further comprises: The port to which the connection information is transmitted;

The device for implementing wired screen transmission further includes:

And a connection confirmation module, configured to generate a connection success instruction, adapt the connection success instruction to a port for transmitting connection information, and send the first connection to the first device through the first USB interface.
The device for implementing wired screen transmission according to claim 18, wherein the communication protocol port further comprises: a port for transmitting a return request;

The device for implementing wired screen transmission further includes:

The backhaul request 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 the return request, the information is identified as a backhaul request command Transmitting the backhaul request command to the second device through the second USB interface, and causing the second device to return the detected control signal to the first device.
The device for implementing wired screen transmission according to claim 18, wherein the communication protocol port further comprises: a port for accessing a storage space;

The device for implementing wired screen transmission further includes:

The storage 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 to access the storage space, the information is identified as a storage space access instruction. Displaying the preset storage space to the first device, such that the first device system interface is configured to intercept the picture and audio played by the first device by running the program of the storage space.
The device for implementing wired screen transmission according to any one of claims 18 to 21, wherein 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
An apparatus for implementing wired screen transmission, comprising:

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 for transmitting a control signal; 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;

An audio and video intercepting module, configured to intercept a picture and audio played by the first device;

And an audio and video sending module, configured to send the intercepted audio and video data to a first USB interface of the USB device through a corresponding port of the USB interface of the first device, where the corresponding port is connected to a port for transmitting audio and video data adapt;

The control signal receiving module is configured to receive information from the first USB interface of the USB device through the first device USB interface, and detect a communication protocol port that transmits the information; if the port is used to transmit the control signal, identify the information To manipulate the signal, and cause the first device to perform an action corresponding to the manipulation signal.
The apparatus for implementing wired screen transmission according to claim 23, wherein the communication protocol port further comprises: a port for accessing a storage space;

The audio and video intercepting module is configured to adapt the generated access instruction to a port for accessing the storage space, and send the first USB interface to the USB device through the first device USB interface to access the USB device Pre-set storage space, and running the program of the preset storage space through the first device system interface to intercept the picture and audio played by the first device.
The apparatus for implementing wired screen transmission according to claim 23 or 24, characterized in that

The first device is a display source device, and the attribute of the first device USB interface is a USB host;

The attribute of the first USB interface is a USB device.
An apparatus for implementing wired screen transmission, comprising:

The USB access detection module 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 requirement; the USB device is provided with a second USB interface, and the USB device passes through the device. The second USB interface is connected to the USB interface of the second device;

The audio and video data receiving module is configured to receive, by the second device, the audio and video data forwarded by the second USB interface of the USB device, and play the corresponding audio and video on the second device, if the USB device meets the requirements;

The control signal sending module is configured to acquire the detected control signal to the first device, and send the control signal to the second USB interface of the USB device through the second device USB interface to pass the USB device A USB interface returns to the first device, causing the first device to perform an action corresponding to the manipulation signal.
The apparatus for implementing wired screen transmission according to claim 26, wherein

The second device is a display device, and the attribute of the second device USB interface is a USB host;

The attribute of the second USB interface is a USB device.