CN113965799A - Method and device for realizing wired screen transmission - Google Patents

Method and device for realizing wired screen transmission Download PDF

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Publication number
CN113965799A
CN113965799A CN202110911331.0A CN202110911331A CN113965799A CN 113965799 A CN113965799 A CN 113965799A CN 202110911331 A CN202110911331 A CN 202110911331A CN 113965799 A CN113965799 A CN 113965799A
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China
Prior art keywords
usb interface
port
audio
equipment
transmitting
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Granted
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CN202110911331.0A
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Chinese (zh)
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CN113965799B (en
Inventor
庞远杨
侯旻翔
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
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Priority to CN202110911331.0A priority Critical patent/CN113965799B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—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 or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
    • H04N21/43632—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • 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 or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]

Abstract

The invention relates to a method and a device for realizing wired screen transmission. The method comprises the following steps: providing more than two communication protocol ports for first equipment based on a pre-installed general driver of the first equipment, and establishing USB communication connection between a local terminal and the first equipment through the communication protocol ports and a first USB interface of the local terminal; detecting that the first USB interface has information from first equipment, detecting a port for transmitting the information, identifying the information as audio and video data if the port is used for transmitting the audio and video data, and playing corresponding audio and video at the local terminal; the method comprises the steps of obtaining a control signal of a first device detected by a local terminal, adapting the control signal to a port for transmitting the control signal, and sending the control signal to the first device through a first USB interface. The invention can simplify the wiring during screen transmission and reduce the wiring difficulty for users.

Description

Method and device for realizing wired screen transmission
The present application is a divisional application of the chinese patent application with application number 201611043054.1, entitled "method and apparatus for realizing wired screen transmission" filed by the chinese patent office in 2016, 11, month 21, the entire contents of which are incorporated herein by reference.
Technical Field
The invention relates to the technical field of data transmission, in particular to a method and a device for realizing wired screen transmission.
Background
The screen transmission realization mode is that the display source equipment such as a computer intercepts the screen page and the sound data of the system and sends the data to the display equipment, and the display equipment decodes, displays and plays the sent pictures and sound. The pass screen is often used in meeting or teaching field, and the user needs to show the audio and video signal of computer on projecting the liquid crystal whiteboard or the projector of large-size screen, and audio and video data on the computer is sent to display device through corresponding data line. However, in the conventional display mode of the transmission screen, the display device is only used as an information display function, and does not have the functions of receiving the operation instruction of the user and returning the operation instruction to the display source, so that the user is inconvenient to perform the demonstration operation.
On the basis, in a screen transmission mode based on the touch screen display equipment, a touch control signal detected by the display equipment is fed back to a computer terminal, and correspondingly, a connecting line for transmitting a control signal needs to be added between the computer and the display equipment. Therefore, two or more connecting wires (HDMI cable + USB cable/RS 232 cable, VGA cable + audio cable + USB cable or RS232 cable, etc.) are required between the computer and the display device. The problem that the wiring is complex and the requirement on the professional level of a user is high exists.
Disclosure of Invention
Based on this, the method and the device for realizing wired screen transmission provided by the embodiment of the invention can simplify the wiring during screen transmission display and reduce the wiring difficulty for users.
One aspect of the present invention provides a method for implementing wired screen transmission, including:
providing a plurality of communication protocol ports for first equipment through a first USB interface preset at the local terminal, wherein the communication protocol ports can be identified by a universal driver of the first equipment; the generic driver provides a generic communication protocol for communication between the first device and a standard USB device, the communication protocol port comprising at least: the port used for transmitting audio and video data and the port used for transmitting the control signal;
establishing a USB communication connection between the local terminal and first equipment through the communication protocol port and the first USB interface;
detecting that the first USB interface has information from first equipment, detecting a port for transmitting the information, and identifying the information as audio and video data if the port is used for transmitting the audio and video data; playing corresponding audio and video at the local terminal according to the audio and video data;
the method comprises the steps of obtaining a control signal of a first device detected by a local terminal, adapting the control signal to a port for transmitting the control signal, sending the control signal to the first device through a first USB interface, and indicating the first device to execute an action corresponding to the control signal after receiving the control signal.
Another aspect of the present invention provides a method for implementing wired screen transmission, including:
identifying a communication protocol port provided by a second device accessed to a second USB interface of the home terminal through a pre-installed universal driver, wherein the universal driver provides a universal communication protocol for communication between the home terminal and a standard USB device, and the communication protocol port at least comprises: the port used for transmitting audio and video data and the port used for transmitting the control signal; the second device is pre-provided with a first USB interface, is accessed to a second USB interface at the local end through the first USB interface and provides a plurality of communication protocol ports which can be identified by the universal drive of the first device through the first USB interface;
intercepting the picture and/or audio played by the home terminal;
transmitting the intercepted audio and video data to a first USB interface of the second equipment through a designated port of a second USB interface of the local terminal, wherein the designated port is adapted to a port for transmitting the audio and video data;
receiving information from a first USB interface of the second equipment, and detecting a port for transmitting the information; and if the port is used for transmitting the control signal, identifying the information as the control signal, and enabling the first equipment to execute the action corresponding to the control event signal.
The invention also provides a device for realizing wired screen transmission, which comprises:
the port simulation module is used for providing a plurality of communication protocol ports for the first equipment through a first USB interface preset at the local terminal, and the communication protocol ports can be identified by a general driver of the first equipment; the generic driver provides a generic communication protocol for communication between the first device and a standard USB device, the communication protocol port comprising at least: the port used for transmitting audio and video data and the port used for transmitting the control signal;
the connection establishing module is used for establishing the USB communication connection between the local terminal and the first equipment through the communication protocol port and the first USB interface;
the audio and video data receiving module is used for detecting that the first USB interface has information from the first equipment, detecting a port for transmitting the information, and identifying the information as audio and video data if the port is used for transmitting the audio and video data; playing corresponding audio and video at the local terminal according to the audio and video data received by the first USB interface;
the control signal returning module is used for acquiring a control signal of the first device detected by the home terminal, adapting the control signal to a port for transmitting the control signal, sending the control signal to the first device through a first USB interface of the home terminal, and instructing the first device to execute an action corresponding to the control signal after receiving the control signal.
The invention also provides a device for realizing wired screen transmission, which comprises:
a USB identification module, configured to identify, through a pre-installed generic driver, a communication protocol port provided by a second device accessing to a second USB interface of a home terminal, where the generic driver provides a generic communication protocol for communication between the home terminal and a standard USB device, and the communication protocol port at least includes: the port used for transmitting audio and video data and the port used for transmitting the control signal; the second device is pre-provided with a first USB interface, is accessed to a second USB interface at the local end through the first USB interface and provides a plurality of communication protocol ports which can be identified by the universal drive of the first device through the first USB interface;
the audio and video capture module is used for capturing the picture and/or audio played by the home terminal;
the audio and video transmission module is used for transmitting the intercepted audio and video data to a first USB interface of the second equipment through a designated port of a second USB interface of the local terminal, and the designated port is adapted to a port for transmitting the audio and video data;
the control signal receiving module is used for receiving information from a first USB interface of the second equipment and detecting a port for transmitting the information; and if the port is used for transmitting the control signal, identifying the information as the control signal, and enabling the first equipment to execute the action corresponding to the control event signal.
According to the technical scheme, the display equipment is simulated into standard USB equipment, a plurality of communication protocol ports required by the display source equipment are provided for the display source equipment through the USB interface of the display equipment, and the USB communication connection between the display equipment and the display source equipment is established through the communication protocol ports, the USB interface of the display equipment and the USB interface of the display source equipment; when detecting that the USB interface of the display equipment has information from the display source equipment, detecting a port for transmitting the information, if the port is used for transmitting audio and video data, identifying the information as the audio and video data, and playing corresponding audio and video on the display equipment; and meanwhile, acquiring a control signal which is detected by a display equipment end and is played by the display source equipment, adapting the control signal to a port for transmitting the control signal, and sending the control signal to the display source equipment through a USB interface of the display equipment so that the display equipment executes an action corresponding to the control signal. Display source equipment and display device all only need a connecting wire alright realize audio and video data pass the screen show, can also realize display device simultaneously and control the passback of signal, have realized controlling the effect of display source equipment at the display device end, have simplified the wiring that passes the screen display and show, reduce the wiring degree of difficulty to the user.
Drawings
FIG. 1 is a schematic diagram of a system environment for implementing a method for wired screen transmission according to the present invention;
FIG. 2 is a schematic flow chart diagram of a method of implementing wired pass screen according to an embodiment;
FIG. 3 is a detailed flowchart of a method for implementing cable screen transmission according to an embodiment;
FIG. 4 is a schematic flow chart of a method for implementing wired screen transmission according to a second embodiment;
fig. 5 is a detailed flowchart of a method for implementing wired screen transmission by a display source device according to a second embodiment;
FIG. 6 is a schematic block diagram of an apparatus implementing wired pass screen according to an embodiment;
fig. 7 is a schematic configuration diagram of an apparatus for implementing wired screen transmission of the second embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a schematic diagram of a system environment for implementing the method for wired screen transmission according to the present invention. As shown in fig. 1, the system environment of the embodiment of the present invention includes a display source device (i.e., a first device) and a display device (i.e., a second device). The display source device can be a device or a system such as a PC (personal computer), a mobile phone and the like running with an operating system, at least one pre-installed universal driver is arranged in the system, and the universal driver provides a universal communication protocol for communication between the display source device and a standard USB device. The display source device is also provided with at least one USB interface (namely a USB interface B/a second USB interface), and the attribute of the USB interface is set as USBhost.
The display device is a device or a system running an operating system, such as a large-screen electronic whiteboard, and is provided with a memory and a processor; the display equipment is also preset with a USB interface (namely a USB interface A/a first USB interface), and the attribute of the USB interface is set as USBdevice and is used for being butted with a USB interface B of the display source equipment; a corresponding processor program runs in the processor and can identify the type of the information received by the USB interface A; one of the purposes of the memory is a downloader for storing a specific program or programs required by the display source device or the display device.
Based on the system environment diagram shown in fig. 1, fig. 2 is a schematic flow chart of a method for implementing wired screen transmission according to an embodiment; in this embodiment, the method is applied to a display device side as an example for explanation, and the display device includes a first USB interface for connecting with a second USB interface of a display source device.
As shown in fig. 2, the method for implementing wired screen transmission in this embodiment includes the steps of:
s11, providing a plurality of communication protocol ports for the first equipment through a first USB interface preset at the local terminal, wherein the communication protocol ports can be identified by a universal driver of the first equipment; the generic driver provides a generic communication protocol for communication between the first device and a standard USB device, the communication protocol port comprising at least: the port used for transmitting audio and video data and the port used for transmitting the control signal;
in this embodiment, the local terminal refers to a display device, and the display device can be simulated into a standard USB device through a USB interface of the display device; the first equipment is display source equipment, the pre-installed general driver of the display source equipment can independently drive different types of standard USB equipment, and the display source equipment can also be provided with corresponding client software for receiving screen transmission operation of a user.
In this embodiment, the USB interface is a physical concept, and the communication protocol ports provided through the USB interface are abstract concepts facing the USB connection service, and different communication protocol ports can be distinguished through corresponding port identifiers, for example, through port numbers. In this embodiment, the port identifier of each communication protocol port can be identified by the universal USB driver, and the corresponding processor in the local terminal also receives and transmits various types of information (including audio/video data or control signals) through the port identifier of the communication protocol port, so as to realize the reception and transmission of various types of information through the same physical interface.
Correspondingly, the display device can be simulated into a standard USB device, which means that the display device can enumerate a plurality of standard USB communication protocol ports based on a universal standard USB communication protocol, and different USB communication protocol ports are distinguished by using different port identifiers.
S12, establishing a USB communication connection between the second device and the first device through the communication protocol port and a first USB interface of the second device;
in this embodiment, the second device is a display device, and the display device may be simulated as several types of standard USB devices and provides a corresponding communication protocol port. And the display device is simulated into a standard USB device, and the display source device can recognize the standard USB device without driving (namely, the standard USB device can be recognized by a universal USB driver of the display source device system without a specific universal driver).
Preferably, the communication protocol port further includes: and a port for transmitting connection information. Correspondingly, when the display equipment confirms that the accessed display source equipment meets the requirements, a connection success instruction can be generated; and the connection success instruction is adapted to a port for transmitting connection information and is sent to the display source equipment through the first USB interface so as to inform the display source equipment that the display equipment meets the requirement of audio and video transmission display.
S13, detecting that the first USB interface has information from the first device, detecting a port for transmitting the information, and identifying the information as audio and video data if the port is used for transmitting the audio and video data; playing corresponding audio and video on second equipment according to the audio and video data;
preferably, the second device further needs to parse, decompress and/or decode the audio/video data.
S14, acquiring a control signal detected by the second device, adapting the control signal to a port for transmitting the control signal, and sending the control signal to the first device through the first USB interface, so as to instruct the first device to execute an action corresponding to the control signal after receiving the control signal.
The action corresponding to the manipulation event signal may be any action that can be performed by the first device.
The execution sequence of steps S13 and S14 is not limited to the above sequence, and the execution sequence of the two parts may be switched or may be executed simultaneously.
Preferably, the communication protocol port further includes: a port for accessing a memory space. After the display source equipment is successfully connected with the display equipment, if a software program for intercepting a display picture and/or an audio is installed in advance in the display source equipment, intercepting the currently played display picture and/or audio through the software program, packaging and sending the currently played display picture and/or audio to the display equipment; if the display source device does not have the software program installed in advance, the software program which is used for intercepting the currently played display picture and/or audio and is stored in the memory of the display device in advance can be read by accessing the memory (storage space) of the display device, and is packaged (at the moment, the display device is equivalent to an external USB (universal serial bus) disk), the packaged audio and video data are sent to the corresponding port, and the packaged audio and video data are sent to the display device through the USB interface B. The second method has lower requirements on the display source device, even if the corresponding program is not installed in advance, for the display source device (such as a PC), when the display device is inserted, a "removable disk", which is a storage space of the display device, can be seen in the root directory of the my computer, so that the display source device can run the application program stored in advance from the "removable disk", and the plug and play effect is realized. The display equipment receives the audio and video data from the USB interface A, processes the audio and video data and plays the audio and video data, and screen transmission display of the audio and video data is achieved.
On the other hand, the control signal which is detected by the display equipment end and is played by the display source equipment can be obtained, the control signal is adapted to the port for transmitting the control signal, and the control signal is transmitted back through the USB interface A of the display equipment, so that the display source equipment executes the action corresponding to the control signal. For example: the display device converts the touch event into an HID touch event, which is simulated as an HID touch device, which is submitted to the display source device system through USB interface a. And for the display source equipment system, corresponding actions are executed according to the received operation events in a manner of conventionally processing the operation events of the HID touch equipment.
Based on the wired screen transmission method, on one hand, various USB communication protocol ports required to be used can be provided for common display source equipment, the common display source equipment can be identified without driving, corresponding audio and video data interception and capture functions can be completed according to data information stored in the display equipment in advance, and the plug-and-play effect is achieved; the display source device and the display device can be connected in a limited screen transmission mode only by one USB connecting line without extra middle screen transmission devices, meanwhile, the display device can also achieve back transmission of control signals, a user can control the display source device at the display device end, and wiring displayed by the screen transmission device is simplified.
It is understood that, in the present embodiment, the port for transmitting connection information and the port for transmitting audio/video information may be an HID1 port and an HID2 port, respectively; the port for transmitting the memory access instruction may be a Mac type port. In other words, in this embodiment, the display device may be simulated into a plurality of types of communication protocol ports capable of being recognized by the display source device system without being driven through the USB interface a according to actual needs, and each of the plurality of communication protocol ports may be driven by the general driver of the display source device independently, and is respectively used for transmitting different data information.
FIG. 3 is a detailed flowchart of a method for implementing cable screen transmission according to an embodiment; referring to fig. 3, the display device detects that the USB interface a has information from the display source device, detects a port for transmitting the information, and if the port is a port for transmitting a backhaul request, recognizes the information as a backhaul request instruction, and starts a function of the display device for acquiring a detected control signal for the first device. Specifically, the steps to be executed by the display device are as follows:
s101, after the display device processor program runs, detecting whether the USB interface A meets the condition or not to access the display source device.
And detecting whether the USB interface A is connected with equipment or not, and if so, further detecting whether the equipment is display source equipment meeting the requirements or not. Specifically, whether the accessed device is a display source device that meets the requirement can be detected by a specific ID (PID/VID).
S102, if the display source equipment is detected to be accessed, a processor program of the display equipment simulates the display equipment into standard USB equipment through a USB interface A, so that the display source equipment with the universal drive can identify the display source equipment without driving.
S103, generating a connection success instruction and confirming that the screen transmission connection is successful;
in this embodiment, the connection success instruction is adapted to a port for transmitting connection information, and is sent to a USB interface B of the display source device through the USB interface a, so as to inform that the local terminal of the display source device meets the requirement of audio/video transmission and display.
S104, detecting whether the USB interface A of the display equipment has audio and video file streams from the display source equipment;
in this embodiment, after detecting that the USB interface a of the display device has information from the display source device, a port for transmitting the information is further detected, and if the port is a port for transmitting audio/video data, the information may be identified as audio/video data.
In this embodiment, the display device further provides a port for accessing the storage space to the display source device. Before the step, if the USB interface A of the display equipment is detected to have the information from the display source equipment, a port for transmitting the information is detected, and if the port is used for accessing the storage space, the information is identified as a storage space access instruction; and displaying the preset storage space of the display equipment to the display source equipment, so that a system interface of the display source equipment is used for intercepting and capturing pictures and/or audio played by the display source equipment by operating a program of the storage space. The preset storage space is stored with an exe executable program for intercepting audio and video data or download information of the corresponding program. Therefore, the display source device can realize the function of capturing the played picture or audio by accessing the storage space of the display device.
And S105, decompressing and/or decoding the audio/video file stream received through the USB interface A, and playing a corresponding picture and/or audio at a display device end.
As a preferred embodiment, after receiving the audio/video file stream, monitoring whether a preset trigger control signal for indicating screen transmission display exists, decompressing and/or decoding the audio/video file stream if the trigger control signal is monitored, and playing the corresponding audio/video at the local terminal according to the obtained audio/video data. The trigger control signal may be an operation signal that a preset button of the home terminal is pressed, or may be a specific touch control signal generated on a human-computer interaction interface preset by the home terminal, that is, a user may control the display of the home terminal on audio and video data in a hardware trigger mode/a software trigger mode, so as to flexibly control the effect of the screen transmission display.
S106, detecting whether the USB interface A of the display equipment has a return request instruction from the display source equipment;
in this embodiment, if it is detected that the USB interface a of the display device has information from the display source device, a port for transmitting the information is detected, and if the port is a port for transmitting the backhaul request, the information may be identified as the backhaul request instruction.
And S107, if a return request instruction from the display source device is received, starting a function (or a thread for running a corresponding function) of the display device, which is used for acquiring the detected control signal of the display source device, and acquiring the control signal of the display device to the display source device.
And S108, adapting the control signal to a port for transmitting the control signal, and sending the control signal to the display source equipment through the USB interface A of the display equipment so that the display source equipment executes the action corresponding to the control signal.
It can be understood that the above-mentioned trigger mechanism for audio and video data screen transmission display is also suitable for controlling the local terminal to send the control signal, so as to flexibly control the remote control effect.
It is understood that the execution sequence of steps S104 to S105 and steps S106 to S108 is not limited to the example in the figure, and steps S106 to S108 may be executed first, and then steps S104 to S105 may be executed; or both parts are executed in parallel according to respectively set time intervals.
The wired screen transmission method of the embodiment simulates the display device into a standard USB device, provides a plurality of communication protocol ports required by the display source device through the USB interface of the display device, and establishes USB communication connection between the display device and the display source device through the communication protocol ports and the USB interface of the display device; when detecting that the USB interface of the display equipment has information from the display source equipment, detecting a port for transmitting the information, if the port is used for transmitting audio and video data, identifying the information as the audio and video data, and playing corresponding audio and video on the display equipment; and meanwhile, acquiring a control signal which is played by the display source equipment and is detected by the display equipment terminal, adapting the control signal to a port for transmitting the control signal, and sending the control signal to the display source equipment through a USB interface of the display equipment so that the display equipment executes an action corresponding to the control signal, thereby realizing the control of the display source equipment at the display equipment terminal. Need not extra middle biography screen equipment, display source equipment and display device all only need a USB connecting wire alright realize audio and video data pass the screen show, can also realize the passback of display device control signal simultaneously, have simplified the wiring that passes the screen display and show, reduce the wiring degree of difficulty to the user.
FIG. 4 is a schematic flow chart of a method for implementing wired screen transmission according to a second embodiment; the method for realizing the wired screen transmission is mainly applied to a display source device side. Referring to fig. 4, the method for implementing wired screen transmission in the present embodiment includes the following steps.
Step S21, identifying a communication protocol port provided by a second device accessed to a second USB interface of the first device through a pre-installed universal driver; the generic driver provides a generic communication protocol for communication between the first device and a standard USB device, the communication protocol port comprising at least: the port used for transmitting audio and video data and the port used for transmitting the control signal; the second device is pre-provided with a first USB interface, is accessed to a second USB interface at the local end through the first USB interface and provides a plurality of communication protocol ports which can be identified by the universal drive of the first device through the first USB interface;
in this embodiment, the first device is a display source device, which refers to a device serving as a display source; the second device is a display device; the USB interface A of the display equipment is butted with the USB interface B of the display source equipment; the attribute of the USB interface B is USB host, and the attribute of the USB interface A is USB device.
Step S22, capturing the picture and/or audio played by the first device;
in this embodiment, the manner of capturing the picture and/or audio played by the display source device may be: the communication protocol port is implemented by running a program stored in the display device, and correspondingly, the communication protocol port further comprises: a port for accessing a memory space. Specific examples thereof include: the display source equipment generates a storage space access instruction according to user operation, adapts the access instruction to a port used for accessing the storage space, sends the access instruction to a USB interface A of the display equipment through a USB interface B so as to access a preset storage space of the display equipment, and operates a program of the preset storage space through a system interface of the display source equipment so as to intercept pictures and/or audio played by a local terminal. Therefore, the corresponding program does not need to be installed in the display source equipment in advance, plug and play are realized, and convenience is provided for users.
Step S23, sending the intercepted audio and video data to a first USB interface of the second device through a designated port of a second USB interface, wherein the designated port is adapted to a port for transmitting the audio and video data;
preferably, before the display source device sends the audio/video data, the display source device may further run a corresponding program in a preset storage space of the display device through a system interface of the display source device to perform compression and/or encoding processing on the captured audio/video data, so as to facilitate transmission.
Step S24, receiving information from the first USB interface of the second device, and detecting a port through which the information is transmitted; and if the port is used for transmitting the control signal, identifying the information as the control signal, and executing the action corresponding to the control signal.
The execution sequence of steps S23 and S24 is not limited to the above sequence, and the execution sequence of the two parts may be switched or may be executed simultaneously.
Preferably, a user at the display source device end can select whether to start the function of returning the control signal, and if the user selects to start the function of returning the control signal, the display source device can send a return request to the display device through the USB interface B after the connection is successfully established; correspondingly, the communication protocol port further comprises: a port for transmitting backhaul requests. The specific mode is as follows: acquiring return request identification bit information preset by display source equipment, and determining whether a return request function of the display source equipment is in an open state or not according to the return request identification bit information; if yes, generating a return request instruction; and adapting the return request instruction to a port for transmitting a return request, and sending the return request instruction to a USB interface A of the display equipment through a USB interface B so as to inform the display equipment to return the control signal of the played audio and/or picture.
FIG. 5 is a detailed flowchart of a method for implementing cable screen transmission according to a second embodiment; referring to fig. 5, the steps to be performed by the source device are shown as follows:
s201, running a general driver of a display source device, and detecting whether a USB device (namely, a display device) which accords with set characteristics is accessed in a system background;
whether the accessed USB device is a display device conforming to the set characteristics can be identified by a specific ID (PID and/or VID).
S202, if yes, whether a connection success instruction sent by the display equipment is received is confirmed;
in this embodiment, the universal driver of the display source device detects that the USB interface B receives information from the USB interface a of the display device, detects a port for transmitting the information, and if the port is a port for transmitting connection information, can identify whether the information is a connection success instruction according to the content of the signal.
S203, if the video and/or audio are received, the currently played picture and/or audio of the display source equipment are intercepted, compressed or coded into a specific file format, and sent to the connected display equipment through a USB interface B of the display source equipment;
preferably, the display source device may generate a storage space access instruction according to a user operation, acquire a port for accessing the storage space from a port provided by the display device to the display source device, adapt the access instruction to the port for accessing the storage space, and send the access instruction to the USB interface a of the display device through the USB interface B to access the preset storage space of the display device; and operating the program of the preset storage space through a system interface of the display source equipment to intercept and capture pictures and/or audio played by the display source equipment. Therefore, the display source equipment does not need to be pre-installed with a corresponding program, plug and play is realized, and convenience is provided for users.
And the audio and video data can be compressed and/or encoded by operating a corresponding program of a preset storage space of the display equipment through a system interface of the display source equipment so as to be convenient for transmission. The interception code can be stored in a U disk simulated by the display device, after the display source device is connected to the display device, the data information stored in the memory of the display device can be viewed through the corresponding communication protocol port, and the related program is run through the system interface of the display source device to intercept and display the picture and/or audio (including sound data and audio adjustment information such as volume, sound channel and the like) played by the display source device.
S204, confirming whether a return request function switch of the display source equipment is turned on (the user can select to turn on or turn off);
in this embodiment, after the connection is successful, whether the backhaul request function of the display source device is in an on state may be determined by reading backhaul request flag bit information preset by the display source device.
S205, if the display device is opened, sending a return request instruction to the display device through a USB interface B of the display source device;
if the current return request function of the display source equipment is in an opening state, a return request instruction is generated; and adapting the return request instruction to a port for transmitting the return request, and sending the return request instruction to a USB interface A of the display equipment through a USB interface B of the display source equipment.
S206, detecting whether the USB interface B of the display source equipment receives a control signal returned by the USB interface A of the display equipment;
s207, if the control signal returned by the display device is received, a corresponding response action is executed.
In this embodiment, the USB interface B of the display source device receives information from the USB interface a of the display device, and detects a port for transmitting the information, and if the port is a port for transmitting an operation signal, the returned operation signal may be identified in a conventional manner for processing an operation event of an external HID device, and an action corresponding to the operation signal is executed.
It is understood that the execution sequence of steps S204 and S205 and steps S206 to S207 is not limited to the example in the figure, and steps S206 to S207 may be executed first, and then steps S204 and S205 may be executed; or both parts are executed in parallel according to respectively set time intervals.
In the wired screen transmission method of the embodiment, the display device is simulated into the standard USB device, and the USB interface of the display device provides the required communication protocol ports for the display source device, so as to establish the wired screen transmission connection between the display source device and the display device; the requirement on the display source equipment is reduced, plug-and-play is realized, additional middle screen transmission equipment is not needed, the display source equipment and the display equipment can realize screen transmission display of audio and video data only through one USB connecting line, meanwhile, the back transmission of control signals of the display equipment can also be realized, wiring displayed by the screen transmission is simplified, and the wiring difficulty of a user is reduced.
Through the method for realizing the wired screen transmission of the embodiment, the display equipment can be simulated into a plurality of types of USB equipment through the USB interface, and the display source equipment provided with the universal drive can be free from special drive identification. The display source device can also obtain a data stream of a control signal from the display device, a code for intercepting the audio and video data can be a system interface of the display source device, but corresponding program data can be stored in a memory of the display device, and the memory of the display device is pre-stored with program data or a program downloader for data communication and interception of the audio and video data of the display source device. After the display source device establishes the USB connection with the display device, the memory of the display device may be accessed to run corresponding program data therein for capturing a picture or audio of the display source device. The display source device can also pack the audio and video data according to an agreed protocol by operating corresponding program data in the display source device, then transmits the audio and video data to the display device through a corresponding communication protocol port, and the display device receives a data packet from the USB interface A, analyzes the protocol and the packet content, and decodes the audio and video data for playing.
The software at the display device end can also obtain the touch operation (or other control signals) of the user on the played picture or audio, and the touch operation (or other control signals) is transmitted back to the display source device through the USB interface A. The display source device can identify the transmitted touch operation signal according to the corresponding communication protocol port, convert the touch operation signal into a similar operation event of the corresponding HID device and execute a corresponding response (the process is supported by an operating system of the display source device, and WINDOWS/MAC has the function), so that the effect of synchronously adjusting the picture and/or audio played by the display source device is realized.
It should be noted that, for the sake of simplicity, the foregoing method embodiments are described as a series of acts or combinations, but those skilled in the art should understand that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention.
Based on the same idea as the method for realizing the wired screen transmission in the embodiment, the invention also provides a device and a system for realizing the wired screen transmission, and the device and the system can be used for executing the method for realizing the wired screen transmission. For convenience of illustration, the schematic structural diagrams of the embodiments of the device and the system for implementing wired screen transmission only show the parts related to the embodiments of the present invention, and those skilled in the art will understand that the illustrated structures do not constitute a limitation to the devices and the systems, and may include more or less components than those illustrated, or combine some components, or arrange different components.
Fig. 6 is a schematic structural diagram of an apparatus for implementing wired screen transmission according to an embodiment of the present invention, and as shown in fig. 6, the apparatus for implementing wired screen transmission according to this embodiment may be a certain functional block in a display device such as a large-screen whiteboard, which specifically includes: the port simulation module 510, the connection establishment module 520, the audio/video data receiving module 530, and the control signal returning module 540 are described in detail as follows:
the port simulation module 510 is configured to provide a plurality of communication protocol ports to a first device through a first USB interface preset at a local terminal, where the communication protocol ports can be identified by a universal driver of the first device; the generic driver provides a generic communication protocol for communication between the first device and a standard USB device, the communication protocol port comprising at least: the port used for transmitting audio and video data and the port used for transmitting the control signal;
the connection establishing module 520 is configured to establish a USB communication connection between the second device and the first device through the communication protocol port, the first USB interface of the second device, and the second USB interface of the first device;
the audio/video data receiving module 530 is configured to detect that the first USB interface has information from the first device, detect a port for transmitting the information, and identify the information as audio/video data if the port is used for transmitting the audio/video data; playing corresponding audio and video on second equipment according to the audio and video data received by the first USB interface;
as a preferred embodiment, after the audio/video data receiving module 530 identifies the information as audio/video data, if a preset trigger control signal for indicating screen transmission display is monitored, corresponding audio/video is played at the local terminal according to the audio/video data. The trigger control signal comprises an operation signal that a control button preset at the home terminal is pressed, and can also be a specific touch control signal generated on a human-computer interaction interface provided by the home terminal, namely, a user can control the home terminal to display audio and video data through a hardware trigger mode/a software trigger mode, and the user can flexibly control the screen transmission display effect.
The control signal returning module 540 is configured to obtain a control signal detected by the second device, adapt the control signal to a port for transmitting the control signal, and send the control signal to the first device through the first USB interface, so as to instruct the first device to execute an action corresponding to the control signal after receiving the control signal.
Preferably, the communication protocol port further includes: a port for transmitting connection information; correspondingly, the device for realizing wired screen transmission further comprises: and the connection confirmation module (not shown in the figure) is used for generating a connection success instruction, adapting the connection success instruction to a port for transmitting connection information, and sending the connection success instruction to the first equipment through the first USB interface so as to inform the first equipment that the second equipment meets the requirement of audio and video transmission display.
Preferably, the communication protocol port further includes: a port for transmitting a backhaul request; correspondingly, the device for implementing wired screen transmission further includes a backhaul request module (not shown in the figure) for detecting that the first USB interface has information from the first device, detecting a port for transmitting the information, and if the port is a port for transmitting a backhaul request, starting a function of the second device for acquiring a detected control signal for the first device.
Preferably, the communication protocol port further includes: a port for accessing a memory space; correspondingly, the device for implementing wired screen transmission further includes a storage module 550, configured to detect that the first USB interface has information from the first device, detect a port for transmitting the information, and if the port is a port for accessing a storage space, display a preset storage space of the second device to the first device, so that a system interface of the first device is used to capture a picture and/or an audio played by the first device by running a program of the storage space.
In this embodiment, the first device is a display source device, and the second device is a display device; the attribute of the USB interface of the second device is USB device, and the attribute of the USB interface of the first device is USB host.
Fig. 7 is a schematic configuration diagram of an apparatus for implementing wired screen transmission of the second embodiment. As shown in fig. 7, the apparatus for implementing wired screen transmission of the present embodiment includes:
a USB identification module 610, configured to identify, through a pre-installed generic driver, a communication protocol port provided by a second device accessing to a second USB interface of a first device, where the generic driver provides a generic communication protocol for communication between the first device and a standard USB device, and the communication protocol port at least includes: the port used for transmitting audio and video data and the port used for transmitting the control signal; the second device is pre-provided with a first USB interface, is accessed to a second USB interface at the local end through the first USB interface and provides a plurality of communication protocol ports which can be identified by the universal drive of the first device through the first USB interface;
the audio/video capturing module 620 is configured to capture a picture and/or an audio played by the first device;
and the audio/video sending module 630 is configured to send the captured audio/video data to the first USB interface of the second device through a designated port of the second USB interface, where the designated port is adapted to a port for transmitting the audio/video data.
The control signal receiving module 640 is configured to receive information from the first USB interface of the second device, and detect a port for transmitting the information; and if the port is used for transmitting the control signal, identifying the information as the control signal, and executing the action corresponding to the control signal.
Preferably, the communication protocol port further includes: a port for accessing a memory space; correspondingly, the audio/video capture module 620: the access instruction is specifically used for adapting the generated access instruction to a port for accessing a storage space, sending the access instruction to a first USB interface of the second device through a second USB interface so as to access a preset storage space of the second device, and operating a program of the preset storage space through a system interface of the first device so as to intercept and capture pictures and/or audio played by the first device.
Preferably, the communication protocol port further includes: a port for transmitting a backhaul request; correspondingly, the device for realizing wired screen transmission further comprises: a backhaul request module (not shown in the figure), configured to obtain backhaul request identification bit information preset by the first device, and determine whether a backhaul request function of the first device is in an on state according to the backhaul request identification bit information; if yes, generating a return request instruction; and adapting the return request instruction to a port for transmitting the return request, and sending the return request instruction to a first USB interface of the second equipment through a second USB interface so as to start a function of the second equipment for acquiring the detected control signal of the first equipment.
In this embodiment, the first device is a display source device, and the second device is a display device; the attribute of the USB interface of the second device is USB device, and the attribute of the USB interface of the first device is USB host.
It should be noted that, in the above-mentioned embodiment of the device for implementing wired screen transmission, contents such as information interaction and execution process between modules/units are the same as those of the foregoing method embodiment of the present invention, and the technical effect brought by the above-mentioned method embodiment of the present invention is the same as that of the foregoing method embodiment of the present invention, and specific contents may refer to descriptions in the method embodiment of the present invention, and are not described herein again.
In addition, in the above-mentioned exemplary embodiment of the device for implementing a wired touch screen, the logical division of the functional modules is only an example, and in practical applications, the above-mentioned function distribution may be performed by different functional modules according to needs, for example, due to configuration requirements of corresponding hardware or due to convenience of implementation of software, that is, the internal structure of the device for implementing a wired touch screen is divided into different functional modules to perform all or part of the above-mentioned functions. The functional modules can be realized in a hardware mode or a software functional module mode.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium and sold or used as a stand-alone product. The program, when executed, may perform all or a portion of the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to 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 one object from another, but the objects are not limited by these terms.
The above-described examples merely represent several embodiments of the present invention and should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (60)

1. A method for realizing wired screen transmission is characterized by comprising the following steps:
establishing connection between a first USB interface preset by display equipment and a second USB interface on first source equipment;
the display equipment receives the audio and video data signal transmitted by the second USB interface of the first source equipment through the first USB interface and plays the audio and video data;
and the display equipment transmits a control signal to a second USB interface of the first source equipment through the first USB interface, so that the first source equipment responds to the control signal.
2. The method for implementing wired screen transmission according to claim 1,
and the display equipment receives audio and video data signals transmitted by a port used for transmitting audio and video data in the second USB interface of the first source equipment.
3. The method for implementing wired screen transmission according to claim 1,
the first USB interface is provided with a port for transmitting a control signal, and the display device transmits the control signal to the first source device through the port for transmitting the control signal in the first USB interface.
4. The method for implementing wired screen transmission according to claim 3,
providing a plurality of communication protocol ports to the first source device through the first USB interface preset by the display device, wherein the communication protocol ports can be identified by a universal driver of the first source device; the generic driver provides a generic communication protocol for communication between the first source device and a standard USB device; the communication protocol port includes at least: the port for transmitting audio and video data and the port for transmitting control signals;
the communication protocol port further comprises: a port for transmitting connection information;
and establishing communication connection between the display equipment and the second USB interface of the first source equipment through the communication protocol port and the first USB interface.
5. The method for implementing wired screen transmission according to claim 4,
after the second USB interface communication connection between the display device and the first source device is established through the communication protocol port and the first USB interface, the method further includes:
and generating a connection success instruction, adapting the connection success instruction to a port for transmitting the connection information, and sending the connection success instruction to the first source equipment through the first USB interface.
6. The method for implementing wired screen transmission according to claim 4, wherein the communication protocol port further comprises: a port for transmitting a backhaul request; after receiving the audio and video data signal transmitted by the second USB interface of the first source device through the first USB interface, the method further includes: and transmitting a return request instruction through the port of the return request, and after receiving the return request instruction, starting a function for acquiring the detected control signal of the first source device by the display device.
7. The method for implementing wired screen transmission according to claim 4, wherein the communication protocol port further comprises: a port for accessing a memory space;
detecting that the first USB interface has information from the first source equipment, and detecting a port for transmitting the information; if the port is used for accessing the storage space, the information is identified as a storage space access instruction; and displaying the preset storage space of the display device to the first source device, so that a system interface of the first source device is used for intercepting and capturing pictures and/or audio played by the first source device by operating a program of the preset storage space.
8. The method for implementing wired screen transmission according to any one of claims 1 to 7, wherein the attribute of the first USB interface is USB device, and the attribute of the second USB interface is USB host.
9. The method for realizing wired screen transmission according to any one of claims 1 to 7, wherein when the display device detects that the audio/video data is transmitted, the audio/video data is decompressed and/or de-encoded.
10. The method for realizing wired screen transmission according to any one of claims 1 to 7, wherein the types of the manipulation signals include: a touch control signal or an infrared remote control signal.
11. The method for realizing wired screen transmission according to any one of claims 1 to 7, wherein the playing of the audio and video data by the display device specifically includes:
and if a preset trigger control signal for indicating screen transmission display is monitored, playing corresponding audio and video on the display equipment according to the audio and video data.
12. A method for realizing wired screen transmission is characterized by comprising the following steps:
establishing connection between a first USB interface preset by display equipment and a second USB interface on first source equipment;
capturing the picture and/or audio played by the first source equipment;
the display equipment receives and plays the captured picture and/or audio played by the first source equipment and transmitted by the second USB interface of the first source equipment through the first USB interface;
and the display equipment transmits a control signal to a second USB interface of the first source equipment through the first USB interface, so that the first source equipment responds to the control signal.
13. The method for implementing wired screen transmission according to claim 12,
and the display equipment receives the intercepted picture and/or audio played by the first source equipment, which is transmitted by a port used for transmitting audio and video data in the second USB interface of the first source equipment.
14. The method for implementing wired screen transmission according to claim 12,
the first USB interface is provided with a port for transmitting control signals, and the display equipment transmits the control signals to the first source equipment through the port for transmitting the control signals in the first USB interface.
15. The method for implementing wired screen transmission according to claim 14,
providing a plurality of communication protocol ports to the first source device through the first USB interface preset by the display device, wherein the communication protocol ports can be identified by a universal driver of the first source device; the generic driver provides a generic communication protocol for communication between the first source device and a standard USB device; the communication protocol port includes at least: the port for transmitting audio and video data and the port for transmitting control signals;
the communication protocol port further comprises: a port for transmitting connection information;
and establishing the second USB interface communication connection between the display equipment and the first source equipment through the communication protocol port and the first USB interface.
16. The method for implementing wired screen transmission according to claim 15,
the communication protocol port further comprises: a port for accessing a memory space;
the specific steps of capturing the picture and/or audio played by the first source device include:
and the generated access instruction is adapted to a port for accessing a storage space, the generated access instruction is sent to the first USB interface of the display equipment through the second USB interface of the first source equipment so as to access a preset storage space of the display equipment, and a program of the preset storage space is operated through a system interface of the first source equipment so as to intercept and capture pictures and/or audio played by the first source equipment.
17. The method for implementing wired screen transmission according to claim 16, wherein the communication protocol port further comprises: a port for transmitting a backhaul request; the display device further includes, after receiving, through the first USB interface, the captured picture and/or audio played by the first source device and transmitted through the second USB interface of the first source device: and transmitting a return request instruction through a port of the return request, and after receiving the return request instruction, starting a function for acquiring and detecting the control signal of the first source device by the display device.
18. The method for implementing wired screen transmission according to claim 17, wherein before transmitting the captured pictures and/or audio played by the first source device to the first USB interface of the display device, the method further comprises:
and operating a corresponding program of the preset storage space through the system interface of the first source equipment to compress and/or encode the intercepted picture and/or audio data played by the first source equipment.
19. A method for implementing wired screen transmission according to any one of claims 12 to 18, wherein the attribute of the first USB interface is USB device, and the attribute of the second USB interface is USB host.
20. An apparatus for implementing wired screen transmission, comprising:
the connection establishing module is used for establishing the connection between a first USB interface of the display equipment and a second USB interface of the first source equipment;
the audio and video data receiving module is used for receiving the audio and video data signals transmitted to the first USB interface of the display device by the second USB interface of the first source device and enabling the display device to play the audio and video data;
the control signal sending module is configured to send a control signal to a second USB interface of the first source device through the first USB interface of the display device, so that the first source device responds to the control signal.
21. The apparatus for implementing wired screen transmission according to claim 20, further comprising:
the port simulation module is used for providing a plurality of communication protocol ports for the first source equipment through the first USB interface preset by the display equipment, and the communication protocol ports can be identified by the universal driver of the first source equipment; the communication protocol port comprises a port for transmitting audio and video data and a port for transmitting a control signal.
22. The device for implementing wired screen transmission according to claim 21, wherein the communication protocol port further comprises: a port for transmitting connection information;
the device for realizing wired screen transmission further comprises:
and the connection confirmation module is used for generating a connection success instruction, adapting the connection success instruction to the port for transmitting the connection information, and sending the connection success instruction to the first source equipment through the first USB interface of the display equipment.
23. The device for implementing wired screen transmission according to claim 21, wherein the communication protocol port further comprises: a port for transmitting a backhaul request;
the device for realizing wired screen transmission further comprises:
a return request receiving module, configured to detect that the first USB interface of the display device has information from the first source device, and detect a port through which the information is transmitted; and if the port is the port for transmitting the return request, starting a function of the display device for acquiring the control signal of the first source device.
24. The device for implementing wired screen transmission according to claim 21, wherein the communication protocol port further comprises: a port for accessing a memory space;
the device for realizing wired screen transmission further comprises:
the storage module is used for detecting that the first USB interface has information from the first source equipment and detecting a port for transmitting the information; and if the port is used for accessing the storage space, displaying the preset storage space of the display device to the first source device, so that the system interface of the first source device is used for intercepting and capturing pictures and/or audio played by the first source device by running a program of the preset storage space.
25. A device for implementing wired screen transmission according to any one of claims 20 to 24, wherein the attribute of the first USB interface is USB device, and the attribute of the second USB interface is USB host.
26. An apparatus for implementing wired screen transmission, comprising:
the connection establishing module is used for establishing the connection between a first USB interface of the display equipment and a second USB interface of the first source equipment;
the audio/video capture module is used for capturing the picture and/or audio played by the first source equipment;
the audio and video data receiving module is used for receiving the intercepted picture and/or audio played by the first source device and transmitted to the first USB interface of the display device by the second USB interface of the first source device and enabling the display device to play the intercepted picture and/or audio played by the first source device;
the control signal sending module is configured to send a control signal to the second USB interface of the first source device through the first USB interface of the display device, so that the first source device responds to the control signal.
27. The apparatus for implementing wired screen transmission according to claim 26, further comprising: the port simulation module is used for providing a plurality of communication protocol ports for the first source equipment through the first USB interface preset by the display equipment, and the communication protocol ports can be identified by the universal driver of the first source equipment; the communication protocol port comprises a port for transmitting audio and video data and a port for transmitting a control signal.
28. The device for implementing wired screen transmission according to claim 27, wherein the communication protocol port further comprises: a port for accessing a memory space;
the audio and video capture module is used for adapting the generated access instruction to the port for accessing the storage space, sending the generated access instruction to the first USB interface of the display equipment through the second USB interface of the first source equipment so as to access the preset storage space of the display equipment, and operating a program of the preset storage space through the system interface of the first source equipment so as to capture the picture and/or audio played by the first source equipment.
29. The device for implementing wired screen transmission according to claim 27, wherein the communication protocol port further comprises: a port for transmitting a backhaul request;
the device for realizing wired screen transmission further comprises:
a backhaul request module, configured to obtain backhaul request identification bit information preset by the first source device, and determine whether a backhaul request function of the first source device is in an on state according to the backhaul request identification bit information; if yes, generating a return request instruction; and adapting the return request instruction to the port for transmitting the return request, and sending the return request instruction to the first USB interface of the display device through the second USB interface of the first source device.
30. A device for implementing wired screen transmission according to any one of claims 27 to 29, wherein the attribute of the first USB interface is USB device, and the attribute of the second USB interface is USB host.
31. A method for realizing wired screen transmission is characterized by comprising the following steps:
establishing connection between a first USB interface preset by display equipment and a second USB interface on first source equipment;
the first source device transmits the audio and video data signal to a first USB interface of a display device through the second USB interface, so that the display device plays the audio and video data;
and the first source equipment receives the control signal transmitted by the display equipment through the first USB interface through the second USB interface and responds to the control signal.
32. The method for implementing wired screen transfer of claim 31,
the second USB interface is provided with a port for transmitting audio and video data, and the first source equipment transmits signals of the audio and video data to the display equipment through the port for transmitting the audio and video data in the second USB interface.
33. The method for implementing wired screen transfer of claim 31,
the first source device receives the control signal transmitted by the display device through a port used for transmitting the control signal in the first USB interface.
34. The method for implementing wired screen transfer of claim 33,
providing a plurality of communication protocol ports to the first source device through the first USB interface preset by the display device, wherein the communication protocol ports can be identified by a universal driver of the first source device; the generic driver provides a generic communication protocol for communication between the first source device and a standard USB device; the communication protocol port includes at least: the port for transmitting audio and video data and the port for transmitting control signals;
the communication protocol port further comprises: a port for transmitting connection information;
and establishing the second USB interface communication connection between the display equipment and the first source equipment through the communication protocol port and the first USB interface.
35. The method for implementing wired screen transfer of claim 34,
after the second USB interface communication connection between the display device and the first source device is established through the communication protocol port and the first USB interface, the method further includes:
and generating a connection success instruction, adapting the connection success instruction to a port for transmitting the connection information, and sending the connection success instruction to the first source equipment through the first USB interface.
36. The method for implementing wired screen transmission according to claim 34, wherein the communication protocol port further comprises: a port for transmitting a backhaul request; after the audio and video data signal is transmitted to the first USB interface of the display device, the method further includes: and transmitting a return request instruction through the port of the return request, and after receiving the return request instruction, starting a function for acquiring the detected control signal of the first source device by the display device.
37. The method for implementing wired screen transmission according to claim 34, wherein the communication protocol port further comprises: a port for accessing a memory space;
detecting that the first USB interface has information from the first source equipment, and detecting a port for transmitting the information; if the port is used for accessing the storage space, the information is identified as a storage space access instruction; and displaying the preset storage space of the display device to the first source device, so that a system interface of the first source device is used for intercepting and capturing pictures and/or audio played by the first source device by operating a program of the preset storage space.
38. A method for implementing wired screen transmission according to any one of claims 31 to 37, wherein the attribute of the first USB interface is USB device, and the attribute of the second USB interface is USB host.
39. A method for realizing wired screen transmission according to any one of claims 31 to 37, wherein when the display device detects that the audio/video data is transmitted, the audio/video data is decompressed and/or de-encoded.
40. A method for implementing wired screen transmission according to any one of claims 31 to 37, wherein the types of the manipulation signal include: a touch control signal or an infrared remote control signal.
41. The method for implementing wired screen transmission according to any one of claims 31 to 37, wherein the playing of the audio and video by the display device specifically includes:
and if a preset trigger control signal for indicating screen transmission display is monitored, playing corresponding audio and video on the display equipment according to the audio and video data.
42. A method for realizing wired screen transmission is characterized by comprising the following steps:
establishing connection between a first USB interface preset by display equipment and a second USB interface on first source equipment;
capturing the picture and/or audio played by the first source equipment;
the first source device transmits the intercepted picture and/or audio played by the first source device to the first USB interface of the display device through a second USB interface, so that the display device plays the intercepted picture and/or audio played by the first source device;
the first source device receives the control signal transmitted by the display device through the first USB interface and responds to the control signal.
43. The method for implementing wired screen transfer according to claim 42,
the second USB interface is provided with a port for transmitting audio and video data, and the first source device transmits the intercepted picture and/or audio played by the first source device to the display device through the port for transmitting audio and video data in the second USB interface.
44. The method for implementing wired screen transfer according to claim 42,
the first source device receives the control signal transmitted by the display device through a port used for transmitting the control signal in the first USB interface.
45. The method for implementing wired screen transfer of claim 44,
providing a plurality of communication protocol ports to the first source device through the first USB interface preset by the display device, wherein the communication protocol ports can be identified by a universal driver of the first source device; the generic driver provides a generic communication protocol for communication between the first source device and a standard USB device; the communication protocol port includes at least: the port for transmitting audio and video data and the port for transmitting control signals;
the communication protocol port further comprises: a port for transmitting connection information;
and establishing the second USB interface communication connection between the display equipment and the first source equipment through the communication protocol port and the first USB interface.
46. The method for implementing wired screen transfer of claim 45,
the communication protocol port further comprises: a port for accessing a memory space;
the specific steps of capturing the picture and/or audio played by the first source device include:
and the generated access instruction is adapted to a port for accessing a storage space, the generated access instruction is sent to the first USB interface of the display equipment through the second USB interface of the first source equipment so as to access a preset storage space of the display equipment, and a program of the preset storage space is operated through a system interface of the first source equipment so as to intercept and capture pictures and/or audio played by the first source equipment.
47. The method for implementing a wired pass screen according to claim 46, wherein the communication protocol port further comprises: a port for transmitting a backhaul request; the method for transmitting the intercepted picture and/or audio played by the first source device to the first USB interface of the display device further comprises the following steps: and transmitting a return request instruction through a port of the return request, and after receiving the return request instruction, starting a function for acquiring and detecting the control signal of the first source device by the display device.
48. The method for implementing wired screen transmission according to claim 47, wherein the step of transmitting the captured pictures and/or audio played by the first source device to the first USB interface of the display device further comprises:
and operating a corresponding program of the preset storage space through the system interface of the first source equipment to compress and/or encode the intercepted picture and/or audio data played by the first source equipment.
49. A method for implementing a wired pass screen according to any one of claims 42 to 48, wherein the attribute of the first USB interface is USB device, and the attribute of the second USB interface is USB host.
50. An apparatus for implementing wired screen transmission, comprising:
the connection establishing module is used for establishing the connection between a first USB interface of the display equipment and a second USB interface of the first source equipment;
the audio and video data sending module is used for sending the audio and video data signals of the first source equipment to a first USB interface of the display equipment through the second USB interface so that the display equipment can play the audio and video data;
and the control signal receiving module is used for receiving the control signal transmitted by the display equipment through the first USB interface and enabling the first source equipment to respond to the control signal.
51. The device for realizing wired screen transmission according to claim 50, further comprising:
the port simulation module is used for providing a plurality of communication protocol ports for the first source equipment through the first USB interface preset by the display equipment, and the communication protocol ports can be identified by the universal driver of the first source equipment; the communication protocol port comprises a port for transmitting audio and video data and a port for transmitting a control signal.
52. The device for implementing wired screen transmission according to claim 51, wherein the communication protocol port further comprises: a port for transmitting connection information;
the device for realizing wired screen transmission further comprises:
and the connection confirmation module is used for generating a connection success instruction, adapting the connection success instruction to the port for transmitting the connection information, and sending the connection success instruction to the first source equipment through the first USB interface of the display equipment.
53. The device for implementing wired screen transmission according to claim 51, wherein the communication protocol port further comprises: a port for transmitting a backhaul request;
the device for realizing wired screen transmission further comprises:
a return request receiving module, configured to detect that the first USB interface of the display device has information from the first source device, and detect a port through which the information is transmitted; and if the port is the port for transmitting the return request, starting a function of the display device for acquiring the control signal of the first source device.
54. The device for implementing wired screen transmission according to claim 51, wherein the communication protocol port further comprises: a port for accessing a memory space;
the device for realizing wired screen transmission further comprises:
the storage module is used for detecting that the first USB interface has information from the first source equipment and detecting a port for transmitting the information; and if the port is used for accessing the storage space, displaying the preset storage space of the display device to the first source device, so that the system interface of the first source device is used for intercepting and capturing pictures and/or audio played by the first source device by running a program of the preset storage space.
55. A device for realizing wired screen transmission according to any one of claims 50 to 54, wherein the attribute of the first USB interface is USB device, and the attribute of the second USB interface is USB host.
56. An apparatus for implementing wired screen transmission, comprising:
the connection establishing module is used for establishing the connection between a first USB interface of the display equipment and a second USB interface of the first source equipment;
the audio/video capture module is used for capturing the picture and/or audio played by the first source equipment;
the audio and video transmission module is used for transmitting the intercepted picture and/or audio played by the first source equipment to the first USB interface of the display equipment through the second USB interface so that the display equipment plays the intercepted picture and/or audio played by the first source equipment;
and the control signal receiving module is used for receiving the control signal transmitted by the display equipment through the first USB interface and responding to the control signal.
57. The apparatus for implementing wired screen transmission according to claim 56, further comprising: the port simulation module is used for providing a plurality of communication protocol ports for the first source equipment through the first USB interface preset by the display equipment, and the communication protocol ports can be identified by the universal driver of the first source equipment; the communication protocol port comprises a port for transmitting audio and video data and a port for transmitting a control signal.
58. The device for implementing wired screen transmission according to claim 57, wherein the communication protocol port further comprises: a port for accessing a memory space;
the audio and video capture module is used for adapting the generated access instruction to the port for accessing the storage space, sending the generated access instruction to the first USB interface of the display equipment through the second USB interface of the first source equipment so as to access the preset storage space of the display equipment, and operating a program of the preset storage space through the system interface of the first source equipment so as to capture the picture and/or audio played by the first source equipment.
59. The device for implementing wired screen transmission according to claim 57, wherein the communication protocol port further comprises: a port for transmitting a backhaul request;
the device for realizing wired screen transmission further comprises:
the return request module is used for acquiring return request identification bit information preset by first source equipment and determining whether a return request function of the first source equipment is in an open state or not according to the return request identification bit information; if yes, generating a return request instruction; and adapting the return request instruction to the port for transmitting the return request, and sending the return request instruction to the first USB interface of the display device through the second USB interface of the first source device.
60. A device for realizing wired screen transmission according to any one of claims 57 to 59, wherein the attribute of the first USB interface is USB device, and the attribute of the second USB interface is USB host.
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