CN114697735B - Interconnection screen projection method and device and interaction panel - Google Patents
Interconnection screen projection method and device and interaction panel Download PDFInfo
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- CN114697735B CN114697735B CN202011563600.0A CN202011563600A CN114697735B CN 114697735 B CN114697735 B CN 114697735B CN 202011563600 A CN202011563600 A CN 202011563600A CN 114697735 B CN114697735 B CN 114697735B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000003993 interaction Effects 0.000 title description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 190
- 230000002452 interceptive effect Effects 0.000 claims abstract description 46
- 238000004590 computer program Methods 0.000 claims description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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 stream to a specific local network, e.g. a Bluetooth® network
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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
- H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
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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
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
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- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Controls And Circuits For Display Device (AREA)
- Projection Apparatus (AREA)
Abstract
The application provides an interconnection screen projection method and device, comprising the following steps: receiving a first video signal transmitted by video output equipment in a TYPE C first transmission mode, and judging whether the display quality of the first video signal reaches a target display quality or not; if the display quality of the first video signal does not reach the target display quality, sending target display quality information and a supported video transmission protocol to video output equipment; receiving a second video signal output by the video output device in a TYPE EC second transmission mode according to the target display quality information and a video transmission protocol, wherein the TYPE EC second transmission mode comprises a first video transmission protocol and a second USB data transmission protocol; and receiving and displaying the second video signal. The interconnection screen projection method has the advantage that the corresponding video transmission channel can be selected according to the screen projection display quality requirement of the interactive flat panel so as to transmit video signals meeting the screen projection display quality.
Description
Technical Field
The application relates to the technical field of screen projection, in particular to an interconnection screen projection method, an interconnection screen projection device and an interaction panel.
Background
The screen of the intelligent device such as a notebook, a mobile phone, a tablet personal computer and the like is small, and the display screen is required to be put into a large-size display screen for display in a specific scene, such as putting the display screen of the notebook on a large-size interaction tablet. At this time, the screen is thrown to the interconnection that notebook and interactive dull and stereotyped will be realized through TYPEC interface generally. When the screen is projected through interconnection, the USB3.0 data transmission protocol is preferentially selected for data transmission to obtain a higher transmission rate, so that the screen projection mode between the notebook and the interactive flat panel is DP+USB3.0. The USB3.0 needs to occupy 2 data transmission channels (TX and RX) of the TYPEC interface, so that only 2 data transmission channels (TX and RX) can transmit video signals, and if the notebook does not support the DP1.4 video transmission protocol, then enough data bandwidth cannot be obtained to transmit video signals with a resolution of 4K, a frame rate of 60 frames per second, and only video signals with a resolution of 4K and a frame rate of 30 frames per second. Therefore, in the case of preferentially selecting the USB3.0 data transmission protocol for data transmission, the quality of the display screen of the notebook placed on the interactive tablet is poor.
Disclosure of Invention
In order to overcome the problems in the related art, the embodiment of the application provides an interconnection screen projection method, an interconnection screen projection device and an interaction panel, which have the advantage that a corresponding video transmission channel can be selected according to the screen projection display requirement of the interaction panel so as to transmit video signals meeting the screen projection display quality.
According to a first aspect of an embodiment of the present application, there is provided an interconnection screen projection method, including the steps of:
receiving a first video signal transmitted by video output equipment in a TYPE C first transmission mode, and judging whether the display quality of the first video signal reaches a target display quality, wherein the TYPE C first transmission mode comprises a first video transmission protocol and a first USB data transmission protocol;
if the display quality of the first video signal does not reach the target display quality, sending target display quality information and a supported video transmission protocol to video output equipment; wherein the target display quality information includes target frame rate information;
receiving a second video signal output by the video output device in a TYPE EC second transmission mode according to the target display quality information and a video transmission protocol, wherein the TYPE EC second transmission mode comprises a first video transmission protocol and a second USB data transmission protocol;
and receiving and displaying the second video signal.
In an alternative embodiment, the receiving the first video signal transmitted by the video output device in the first transmission mode of type ec, determining whether the display quality of the first video signal reaches the target display quality includes:
receiving a first video signal transmitted by a video output device in a TYPE EC first transmission mode;
decoding the first video signal to obtain a frame rate of the first video signal;
and judging whether the frame rate of the first video signal reaches a target frame rate matched with the target display quality.
In an alternative embodiment, if the display quality of the first video signal does not reach the target display quality, the method sends the target display quality information and the supported video transmission protocol to the video output device, where the method includes:
and if the frame rate of the first video signal does not reach the target frame rate matched with the target display quality, sending target frame rate information and a supported video transmission protocol to video output equipment.
In an alternative embodiment, the receiving the first video signal transmitted by the video output device in the first transmission mode of type ec, determining whether the display quality of the first video signal reaches the target display quality includes:
receiving a first video signal transmitted by a video output device in a TYPE EC first transmission mode;
decoding the first video signal to obtain the frame rate and resolution of the first video signal;
and judging whether the frame rate of the first video signal reaches a target frame rate matched with the target display quality, and judging whether the resolution of the first video signal reaches a target resolution matched with the target display quality.
In an alternative embodiment, the target display quality information further includes target resolution information;
if the display quality of the first video signal does not reach the target display quality, sending target display quality information and a supported video transmission protocol to a video output device, wherein the method comprises the following steps:
and if the frame rate of the first video signal does not reach the frame rate matched with the target display quality and the resolution of the first video signal does not reach the resolution matched with the target display quality, sending target frame rate information, target resolution information and a supported video transmission protocol to video output equipment.
In an alternative embodiment, the TYPE EC first transmission mode includes the DP1.2 video transmission protocol, and the USB3.0 data transmission protocol;
receiving a first video signal transmitted by a video output device in a type first transmission mode, comprising:
receiving a video signal transmitted by a video output device according to a DP1.2 video transmission protocol;
a data signal transmitted by a video output device in a USB3.0 data transmission protocol is received.
In an alternative embodiment, the TYPE EC second transmission mode includes the DP1.2 video transmission protocol, and the USB2.0 data transmission protocol;
the step of receiving the second video signal output by the video output device in the TYPE C second transmission mode according to the target display quality information and the video transmission protocol includes:
receiving a video signal transmitted by the video output equipment according to the target display quality information and a video transmission protocol and in a DP1.2 video transmission protocol;
and receiving a data signal transmitted by the video output equipment according to the target display quality information and a video transmission protocol and a USB2.0 data transmission protocol.
In an alternative embodiment, the resolution of the target display quality is 4K and the frame rate is 60 frames per second.
In an optional embodiment, the step of receiving the first video signal transmitted by the video output device in the type first transmission mode, and determining whether the display quality of the first video signal reaches the target display quality further includes the step of:
and establishing an interconnection channel with the video output equipment.
In an alternative embodiment, the establishing an interconnection channel with the video output device includes:
establishing connection with video output equipment through a TYPE C interface;
and receiving an interconnection screen-throwing request transmitted by the video output equipment in a TYPE C first transmission mode, and establishing an interconnection channel with the video output equipment.
According to a second aspect of an embodiment of the present application, there is provided an interconnection screen projection device, including:
a first receiving module, configured to receive a first video signal transmitted by a video output device in a type ec first transmission mode, and determine whether a display quality of the first video signal reaches a target display quality, where the type ec first transmission mode includes a first video transmission protocol and a first USB data transmission protocol;
a sending module, configured to send target display quality information and a supported video transmission protocol to a video output device if the display quality of the first video signal does not reach the target display quality; wherein the target display quality information includes target frame rate information;
a second receiving module, configured to receive a second video signal output by the video output device in a type second transmission mode according to the target display quality information and a video transmission protocol, where the type second transmission mode includes a first video transmission protocol and a second USB data transmission protocol;
and the display module is used for receiving and displaying the second video signal.
According to a third aspect of an embodiment of the present application, there is provided an interactive tablet comprising: a processor, a memory, a display device, and a TYPE EC interface; the memory, the display device and the TYPE EC interface are respectively and electrically connected with the processor;
the memory stores a computer program adapted to be loaded by the processor and to perform the interconnected screen-casting method as described above;
the TYPE C interface is externally connected with video output equipment, receives video signals and transmits the video signals to the processor; the processor receives the video signal and sends out a driving signal to drive the display device to display.
According to a fourth aspect of embodiments of the present application, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the interconnection screen projection method as described above.
By applying the technical scheme of the embodiment of the application, when the video output equipment and the interactive flat board are connected through the TYPEC interface to carry out interconnection screen projection, if the display quality of video signals transmitted by the video output equipment is poor, the interactive flat board can send resolution information of target display quality required by the interactive flat board, frame rate information and video transmission protocols supported by the frame rate information to the video output equipment, so that the video output equipment can conveniently select a corresponding video transmission mode to transmit video signals with better quality, and a better screen projection display effect can be obtained.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
For a better understanding and implementation, the present application is described in detail below with reference to the drawings.
Drawings
Fig. 1 is a schematic view of an application scenario of an interconnection screen projection method according to an exemplary embodiment of the present application;
FIG. 2 is a flow chart of an interconnected screen-casting method according to an exemplary embodiment of the present application;
fig. 3 is a flowchart for judging display quality shown in an exemplary embodiment 1 of the present application;
fig. 4 is a flowchart for judging display quality shown in an exemplary embodiment 2 of the present application;
FIG. 5 is a flow chart illustrating the reception of a first video signal according to an exemplary embodiment of the present application;
FIG. 6 is a flow chart illustrating the reception of a second video signal according to an exemplary embodiment of the present application;
FIG. 7 is a block diagram illustrating an interconnect screen apparatus according to an exemplary embodiment of the present application;
fig. 8 is a block diagram of an interactive tablet shown in an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. The word "if"/"if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination", depending on the context.
Referring to fig. 1, an application scenario of an interconnection screen projection method according to an exemplary embodiment is shown.
As shown in fig. 1, an application environment of the interconnection screen projection method of the present embodiment includes an interactive tablet 100 and a video output device 200, where the video output device 200 uses a notebook as an example, and the interactive tablet 100 and the notebook 200 implement interconnection screen projection through a type ec interface connection. In the interconnection screen-throwing process, since the notebook 200 cannot know whether the interactive flat board 100 supports the DP1.2 or DP1.4 video transmission protocol, if the notebook 200 supports the DP1.4 video transmission protocol, the video transmission mode of DP1.4+usb3.0 is selected to directly output the video signal with the resolution of 4k and the frame rate of 60 frames per second to the interactive flat board 100. However, in the case where the notebook 200 itself supports only the DP1.2 video transmission protocol, the first video signal is transmitted in the first video transmission mode of type ec, that is, the video signal is transmitted in the DP1.2 video transmission protocol, and the data signal is transmitted in the USB3.0 data transmission protocol, so as to obtain a higher data transmission rate. At this time, the first video signal to be transmitted is a video signal having a resolution of 4k and a frame rate of 30 frames per second. However, the resolution is 4k, so that the video signal with the frame rate of 30 frames per second is not smooth enough in screen display, and the display effect is poor. In order to obtain a video signal with a better display effect, the interactive flat panel 100 interacts with the notebook 200 through an interconnection screen-projection method to inform the notebook 200 of outputting a second video signal with a resolution of 4k and a frame rate of 60 frames per second, so as to obtain a better display effect.
Specific examples are described below.
According to a first aspect of the embodiment of the present application, an interconnection screen projection method is provided, and the interconnection screen projection method is applied to interconnection screen projection of a video output device and an interactive tablet, where the video output device may be a smart device such as a notebook, a mobile phone, and a tablet computer, in this embodiment, the video output device is illustrated by taking the notebook as an example, and the interactive tablet itself supports a DP1.2 video transmission protocol and a DP1.4 video transmission protocol.
Referring to fig. 2, fig. 2 is a flowchart illustrating an interconnection screen projection method according to an exemplary embodiment of the present application.
The interconnection screen projection method comprises the following steps:
s1: receiving a first video signal transmitted by video output equipment in a TYPE C first transmission mode, and judging whether the display quality of the first video signal reaches a target display quality, wherein the TYPE C first transmission mode comprises a first video transmission protocol and a first USB data transmission protocol; specifically, the TYPE EC first transmission mode includes the DP1.2 video transmission protocol, and the USB3.0 data transmission protocol.
The interactive flat board is connected with the notebook computer through the TYPEC interface, and an interconnection channel is established to realize the screen throwing function. Before the notebook transmits video signals to the interactive tablet, an interconnection channel needs to be established between the interactive tablet and the notebook. Specifically, establishing an interconnection channel with a video output device includes the steps of: establishing connection with video output equipment through a TYPE C interface; and receiving an interconnection screen-throwing request transmitted by the video output equipment in a TYPE C first transmission mode, and establishing an interconnection channel with the video output equipment. That is, when the notebook is connected with the interactive tablet through the TYPE C interface, the notebook can send an interconnection screen-throwing request through the TYPE C first transmission mode, and after the interactive tablet receives the interconnection screen-throwing request sent by the notebook, an interconnection channel is established with the notebook to prepare for screen throwing.
In order to obtain better screen-throwing display quality, when the notebook transmits a first video signal to the interactive flat board in a TYPE C first transmission mode, the interactive flat board receives the first video signal through a TYPE C interface and judges whether the display quality of the first video signal reaches the target display quality.
In an alternative embodiment 1, please refer to fig. 3, fig. 3 is a flowchart illustrating a display quality determination according to an exemplary embodiment 1 of the present application.
Step S1 comprises the steps of:
s101: receiving a first video signal transmitted by a video output device in a TYPE EC first transmission mode;
in this step, since the type c first transmission mode includes: DP1.2 video transport protocol, USB3.0 data transport protocol; accordingly, a specific method of receiving a first video signal transmitted by a video output apparatus in a type first transmission mode includes:
receiving a video signal transmitted by a video output device according to a DP1.2 video transmission protocol;
and receives data signals transmitted by the video output device in a USB3.0 data transmission protocol.
S102: decoding the first video signal to obtain a frame rate of the first video signal;
s103: and judging whether the frame rate of the first video signal reaches a target frame rate matched with the target display quality.
It should be noted that: the Frame rate (Frame rate) is the frequency (rate) at which bitmap images in frames called units appear continuously on the display. The frame rate may also be referred to as the frame frequency and is expressed in hertz (Hz).
In the first transmission mode of TYPEC, since the data transmission protocol is the USB3.0 data transmission protocol, the data transmission occupies the D+ and D-data ports in the TYPEC interface, and two groups of TX and RX data ports for transmitting USB data, and the video signal can only be transmitted through the other two groups of TX and RX data ports, at this time, if the video signal is transmitted by using the video transmission protocol of DP1.2, the data bandwidth is 5.4×2=10.8G, the video signal with the resolution of 4K, the frame rate of 60 frames per second can only be transmitted, and the video signal with the resolution of 4K and the frame rate of 30 frames per second can not be transmitted.
Because the frame rate of the video signal affects the fluency of video playing, that is, the fluency of the video signal with the frame rate of 30 frames per second is worse than the fluency of the video signal with the frame rate of 60 frames per second, after the interactive flat board receives the first video signal, the interactive flat board decodes the first video signal to obtain the frame rate of the first video signal, and judges whether the frame rate of the first video signal reaches the target frame rate matched with the target display quality, if the frame rate of the first video signal does not reach the target frame rate, the screen-throwing display is not smooth enough, is not realistic enough, and affects the overall screen-throwing display quality, then the video signal with higher frame rate is hoped to be obtained.
S2: if the display quality of the first video signal does not reach the target display quality, sending target display quality information and a supported video transmission protocol to video output equipment; wherein the target display quality information includes target frame rate information, and the target frame rate corresponding to the target display quality is 60 frames per second.
Based on the problem that the frame rate of the first video signal does not reach the target frame rate,
the specific method of the step S2 is as follows: and if the frame rate of the first video signal does not reach the target frame rate matched with the target display quality, sending target frame rate information and a supported video transmission protocol to video output equipment.
Namely, the frame rate of the first video signal is 30 frames per second, and the target frame rate of 60 frames per second is not reached, so that the picture is not smooth enough when the screen is put into display, and the interactive panel sends the target frame rate information of 60 frames per second to the notebook; in order to facilitate the notebook to select a corresponding video transmission protocol to transmit video signals, the video transmission protocol supported by the interactive tablet is sent to the notebook. The video transmission protocols supported by the interactive tablet are a DP1.2 video transmission protocol and a DP1.4 video transmission protocol.
The resolution of the video signal is also an important parameter that affects the quality of the projection display. Resolution is also called resolution, and can be subdivided into display resolution, image resolution, print resolution, scan resolution, and the like. The display resolution (screen resolution) is the precision of the screen image and refers to how many pixels the display can display. Since the points, lines and planes on the screen are all composed of pixels, the more pixels the display can display, the finer the picture, and the more information can be displayed in the same screen area, the resolution is a very important performance index. If the whole image is imagined as a large chessboard, the resolution is expressed in terms of the number of all warp and weft intersections. Under the condition of certain display resolution, the smaller the display screen is, the clearer the image is, otherwise, when the size of the display screen is fixed, the higher the display resolution is, the clearer the image is.
Accordingly, in a more preferred embodiment 2, referring to fig. 4, fig. 4 is a flowchart for determining display quality according to an exemplary embodiment 2 of the present application.
Step S1 comprises the steps of:
s111: a first video signal transmitted by a video output device in a TYPE EC first transmission mode is received.
In this step, referring to fig. 5, fig. 5 is a flowchart illustrating a method for receiving a first video signal according to an exemplary embodiment of the present application.
In S111, a specific method for receiving a first video signal transmitted by a video output apparatus in a type first transmission mode includes:
s1111: receiving a video signal transmitted by a video output device according to a DP1.2 video transmission protocol;
s1112: and receives data signals transmitted by the video output device in a USB3.0 data transmission protocol.
S112: decoding the first video signal to obtain the frame rate and resolution of the first video signal;
s113: and judging whether the frame rate of the first video signal reaches a target frame rate matched with the target display quality, and judging whether the resolution of the first video signal reaches a target resolution matched with the target display quality.
The frame rate of the video signal will affect the fluency of video playing, and the resolution will affect the definition of video playing, that is, the resolution is 4K, the fluency of the video signal with the frame rate of 30 frames per second will be worse than that of the video signal with the resolution of 4K, and the fluency of the video signal with the frame rate of 60 frames per second will be worse, so after the interactive flat board receives the first video signal, the interactive flat board will decode the first video signal to obtain the frame rate of the first video signal, and determine whether the frame rate of the first video signal reaches the target frame rate matched with the target display quality, if the frame rate of the first video signal does not reach the target frame rate, the screen-throwing display is not fluent enough, is not realistic enough, affects the overall screen-throwing display quality, and hopefully obtains the video signal with higher frame rate.
Meanwhile, the interactive panel determines whether the resolution of the first video signal has reached the resolution of the target display quality, in this embodiment, the resolution of the target display quality is 4K, and the resolution of the first video signal is also 4K, so that the resolution of the first video signal has reached the target resolution. If the resolution of the target display quality is 4K and the frame rate is 60 frames per second, the target display quality information also needs to include the target resolution information when the resolution of the first video signal does not reach the target resolution.
At this time, the specific method of step S2 is as follows: and if the frame rate of the first video signal does not reach the frame rate matched with the target display quality and the resolution of the first video signal does not reach the resolution matched with the target display quality, sending target frame rate information, target resolution information and a supported video transmission protocol to video output equipment.
If the resolution of the first video signal is 4K, the frame rate is 30 frames per second, and only the frame rate does not reach the target frame rate of 60 frames per second, so that the picture is not smooth enough when the screen is put into display, and the interactive flat plate sends the target frame rate information of 60 frames per second to the notebook; in order to facilitate the notebook to select the corresponding video transmission protocol to transmit the video signal, the video transmission protocol supported by the interactive tablet is transmitted to the notebook. If the resolution of the first video signal does not reach 4K, the interactive flat board can send the target resolution information and the target frame rate information to the notebook computer at the same time, so that the notebook computer can select the video signal with better display quality for transmission.
S3: receiving a second video signal output by the video output device in a TYPE EC second transmission mode according to the target display quality information and a video transmission protocol, wherein the TYPE EC second transmission mode comprises a first video transmission protocol and a second USB data transmission protocol; specifically, the TYPE EC second transmission mode includes a DP1.2 video transmission protocol and a USB2.0 data transmission protocol.
Accordingly, referring to fig. 6, fig. 6 is a flowchart illustrating receiving a second video signal according to an exemplary embodiment of the present application.
The step S3 includes:
s301: receiving a video signal transmitted by the video output equipment according to the target display quality information and a video transmission protocol and in a DP1.2 video transmission protocol;
s302: and receiving a data signal transmitted by the video output equipment according to the target display quality information and a video transmission protocol and a USB2.0 data transmission protocol.
In the second transmission mode of the type ec, since the data transmission protocol is the USB2.0 data transmission protocol, the d+ and D-data ports in the type ec interface are occupied during data transmission, and the TX and RX data ports are not occupied to transmit USB data, so that the video signal may be transmitted through four sets of TX and RX data ports, and at this time, if the video signal is transmitted by using the video transmission protocol of DP1.2, the data bandwidth is 5.4×4=21.6g, so that the resolution is 4K, the frame rate is 60 frames per second, and the video signal with higher definition and better fluency is obtained.
S4: and receiving and displaying the second video signal.
And the processor of the interactive flat board receives the second video signal and then sends the second video signal to the display device for display.
By applying the technical scheme of the embodiment of the application, when the video output equipment and the interactive flat board are connected through the TYPEC interface to carry out screen projection, if the display quality of the video signals transmitted by the video output equipment is poor, the interactive flat board can send the resolution information of the target display quality required by the interactive flat board, the frame rate information and the video transmission protocol supported by the frame rate information to the video output equipment, so that the video output equipment can conveniently select the corresponding video transmission mode to transmit the video signals with better quality, and a better screen projection display effect can be obtained.
According to a second aspect of the embodiment of the present application, an interconnection screen projection device is provided, referring to fig. 7, and fig. 7 is a block diagram of the interconnection screen projection device according to an exemplary embodiment of the present application.
The interconnected screen projection device comprises:
a first receiving module 1, configured to receive a first video signal transmitted by a video output device in a type first transmission mode, and determine whether a display quality of the first video signal reaches a target display quality, where the type first transmission mode includes a first video transmission protocol and a first USB data transmission protocol;
a transmitting module 2, configured to transmit target display quality information and a supported video transmission protocol to a video output device if the display quality of the first video signal does not reach the target display quality; wherein the target display quality information includes target frame rate information;
a second receiving module 3, configured to receive a second video signal output by the video output device in a type ec second transmission mode according to the target display quality information and a video transmission protocol, where the type ec second transmission mode includes a first video transmission protocol and a second USB data transmission protocol;
and the display module 4 is used for receiving and displaying the second video signal.
It should be noted that, when the interconnection screen projection device provided in the foregoing embodiment executes the interconnection screen projection method, only the division of the foregoing functional modules is used for illustrating, in practical application, the foregoing functional allocation may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the embodiment of the interconnection screen projection device and the embodiment of the interconnection screen projection method provided in the foregoing embodiments belong to the same concept, and the detailed implementation process is shown in the embodiments, which are not repeated here.
According to a third aspect of an embodiment of the present application, an interactive tablet 100 is provided, referring to fig. 8, and fig. 8 is a block diagram of an interactive tablet according to an exemplary embodiment of the present application.
The interactive tablet 100 includes a processor 101, a memory 102, a display device 103, and a TYPE EC interface 104; the memory 102, the display 103, and the type ec interface 104 are electrically connected to the processor 101, respectively;
the memory 102 stores a computer program adapted to be loaded by the processor 101 and to perform the interconnection screen projection method as described above;
the TYPE EC interface 104 is externally connected with video output equipment, and receives video signals and transmits the video signals to the processor 101; the processor 101 receives the video signal and sends a driving signal to drive the display device 103 to display.
The interactive tablet 100 further includes a touch device, where the touch device generates a touch signal and transmits the touch signal to the processor 101, and the processor 101 receives the touch signal and outputs the touch signal to the video output device through the type ec interface 104.
According to a fourth aspect of embodiments of the present application, there is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the interconnection screen projection method as described above.
By applying the technical scheme of the embodiment of the application, when the video output device and the interactive flat board are connected through the TYPEC interface to perform screen projection, if the display quality of the video signal transmitted by the video output device is poor, the interactive flat board can send the resolution information of the target display quality required by the interactive flat board, the frame rate information and the video transmission protocol supported by the frame rate information to the video output device, so that the video output device can conveniently select the corresponding video signal with better video transmission mode transmission quality, better screen projection display effect is obtained, and better user experience is realized.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.
Claims (13)
1. The interconnection screen projection method is characterized by comprising the following steps of:
receiving a first video signal transmitted by a video output device in a TYPE C first transmission mode, and judging whether the display quality of the first video signal reaches a target display quality, wherein the TYPE C first transmission mode comprises a first video transmission protocol and a first USB data transmission protocol, the TYPE C first transmission mode occupies D+ and D-data ports in a TYPE C interface, and two groups of TX and RX data ports are used for transmitting USB data;
if the display quality of the first video signal does not reach the target display quality, sending target display quality information and a supported video transmission protocol to video output equipment; wherein the target display quality information includes target frame rate information;
receiving a second video signal output by the video output device in a TYPE EC second transmission mode according to the target display quality information and a video transmission protocol, wherein the TYPE EC second transmission mode comprises a first video transmission protocol and a second USB data transmission protocol, the TYPE EC second transmission mode occupies D+ and D-data ports in a TYPE EC interface, and does not occupy TX and RX data ports to transmit USB data;
and receiving and displaying the second video signal.
2. The method for interconnecting screen shots of claim 1 wherein,
the receiving the first video signal transmitted by the video output device in the TYPE C first transmission mode, judging whether the display quality of the first video signal reaches the target display quality, including:
receiving a first video signal transmitted by a video output device in a TYPE EC first transmission mode;
decoding the first video signal to obtain a frame rate of the first video signal;
and judging whether the frame rate of the first video signal reaches a target frame rate matched with the target display quality.
3. The method for interconnecting screen shots of claim 2 wherein,
if the display quality of the first video signal does not reach the target display quality, sending target display quality information and a supported video transmission protocol to a video output device, wherein the method comprises the following steps:
and if the frame rate of the first video signal does not reach the target frame rate matched with the target display quality, sending target frame rate information and a supported video transmission protocol to video output equipment.
4. The method for interconnecting screen shots of claim 1 wherein,
the receiving the first video signal transmitted by the video output device in the TYPE C first transmission mode, judging whether the display quality of the first video signal reaches the target display quality, including:
receiving a first video signal transmitted by a video output device in a TYPE EC first transmission mode;
decoding the first video signal to obtain the frame rate and resolution of the first video signal;
and judging whether the frame rate of the first video signal reaches a target frame rate matched with the target display quality, and judging whether the resolution of the first video signal reaches a target resolution matched with the target display quality.
5. The interconnected screen method of claim 4, wherein the target display quality information further comprises target resolution information;
if the display quality of the first video signal does not reach the target display quality, sending target display quality information and a supported video transmission protocol to a video output device, wherein the method comprises the following steps:
and if the frame rate of the first video signal does not reach the frame rate matched with the target display quality and the resolution of the first video signal does not reach the resolution matched with the target display quality, sending target frame rate information, target resolution information and a supported video transmission protocol to video output equipment.
6. The method of claim 1, wherein the type c first transmission mode comprises a DP1.2 video transmission protocol and a USB3.0 data transmission protocol;
receiving a first video signal transmitted by a video output device in a type first transmission mode, comprising:
receiving a video signal transmitted by a video output device according to a DP1.2 video transmission protocol;
a data signal transmitted by a video output device in a USB3.0 data transmission protocol is received.
7. The method of claim 1, wherein the type second transmission mode comprises DP1.2 video transmission protocol and USB2.0 data transmission protocol;
the step of receiving the second video signal output by the video output device in the TYPE C second transmission mode according to the target display quality information and the video transmission protocol includes:
receiving a video signal transmitted by the video output equipment according to the target display quality information and a video transmission protocol and in a DP1.2 video transmission protocol;
and receiving a data signal transmitted by the video output equipment according to the target display quality information and a video transmission protocol and a USB2.0 data transmission protocol.
8. The interconnected screen method of claim 1, wherein the resolution of the target display quality is 4K and the frame rate is 60 frames per second.
9. The method for interconnecting screen shots of claim 1 wherein,
the step of receiving the first video signal transmitted by the video output device in the type first transmission mode and judging whether the display quality of the first video signal reaches the target display quality further includes the steps of:
and establishing an interconnection channel with the video output equipment.
10. The method for interconnecting video output devices according to claim 9, wherein said establishing an interconnecting channel with the video output devices comprises:
establishing connection with video output equipment through a TYPE C interface;
and receiving an interconnection screen-throwing request transmitted by the video output equipment in a TYPE C first transmission mode, and establishing an interconnection channel with the video output equipment.
11. An interconnected screen projection device, comprising:
the first receiving module is used for receiving a first video signal transmitted by the video output equipment in a TYPE EC first transmission mode and judging whether the display quality of the first video signal reaches a target display quality, wherein the TYPE EC first transmission mode comprises a first video transmission protocol and a first USB data transmission protocol, the TYPE EC first transmission mode occupies D+ and D-data ports in a TYPE EC interface, and two groups of TX and RX data ports are used for transmitting USB data;
a sending module, configured to send target display quality information and a supported video transmission protocol to a video output device if the display quality of the first video signal does not reach the target display quality; wherein the target display quality information includes target frame rate information;
the second receiving module is used for receiving a second video signal output by the video output device in a TYPE EC second transmission mode according to the target display quality information and the video transmission protocol, wherein the TYPE EC second transmission mode comprises a first video transmission protocol and a second USB data transmission protocol, the TYPE EC second transmission mode occupies D+ and D-data ports in a TYPE EC interface, and does not occupy TX and RX data ports to transmit USB data;
and the display module is used for receiving and displaying the second video signal.
12. The interactive tablet is characterized by comprising a processor, a memory, a display device and a TYPE EC interface; the memory, the display device and the TYPE EC interface are respectively and electrically connected with the processor;
the memory stores a computer program adapted to be loaded by the processor and to perform the interconnection screen projection method of any one of claims 1 to 10;
the TYPE C interface is externally connected with video output equipment, receives video signals and transmits the video signals to the processor; the processor receives the video signal and sends out a driving signal to drive the display device to display.
13. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the interconnection screen projection method as claimed in any one of claims 1 to 10.
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| CN107959545A (en) * | 2016-10-17 | 2018-04-24 | 中兴通讯股份有限公司 | Data transmission method and device, mobile phone, data card |
| CN111316224A (en) * | 2018-03-19 | 2020-06-19 | 广州视源电子科技股份有限公司 | Data transmission device and data transmission method |
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