CN114157891B - Self-adaptive docking method, system and storage medium for screen-throwing terminal - Google Patents
Self-adaptive docking method, system and storage medium for screen-throwing terminal Download PDFInfo
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- CN114157891B CN114157891B CN202111427331.XA CN202111427331A CN114157891B CN 114157891 B CN114157891 B CN 114157891B CN 202111427331 A CN202111427331 A CN 202111427331A CN 114157891 B CN114157891 B CN 114157891B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003032 molecular docking Methods 0.000 title claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 14
- 230000003044 adaptive effect Effects 0.000 claims description 15
- 230000004044 response Effects 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 8
- 230000009191 jumping Effects 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Classifications
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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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440263—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
Abstract
The invention discloses a self-adaptive docking method, a system and a storage medium of a screen-throwing terminal, wherein the method comprises the following steps: s01, constructing a broadcasting control platform; s02, connecting a screen throwing terminal; s03, the broadcasting control platform adapts to the resolution of the screen throwing terminal to issue the content; the security communication protocol established between the connecting terminal and the screen throwing terminal can prevent external illegal signals from being inserted, so that the security of a broadcasting control system is improved.
Description
Technical Field
The invention relates to the technical field of screen projection, in particular to a self-adaptive docking method, a self-adaptive docking system and a storage medium for a screen projection terminal.
Background
The electronic display screen is used as a propagation carrier with high cost performance and high availability, and has wide application. The LED electronic display screen industry in China developed rapidly from 1995, the number of manufacturers increased rapidly, the industry competition was very strong, and a large number of manufacturers were out or turned over in the environment of the superior and inferior. The rapid development of the industry drives economic growth, but the rapid development also leads to the inability to customize standards in time, the standards used by products of various factories are not uniform, and various private protocol layers are endless. In recent years, the LED display screen industry presents a stable development situation under the further guidance and standardization of government regulatory authorities, and the government regulatory authorities combine several industry taps to specify travel industry standards and standardization, and the LED electronic display screen industry gradually enters an adjustment development period. According to the supervision requirements, more and more LED electronic display screen owners carry out unified access management on scattered display screens, however, due to the disorder of the prior industry, the display screens established in the early stage are difficult to match with the current standards and specifications, and great obstruction is caused for management work.
Disclosure of Invention
In view of the above, the present invention aims to provide a method, a system and a storage medium for adaptive docking of a screen-throwing terminal, which are convenient for docking and reliable and stable in playing control.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a self-adaptive docking method of a screen-throwing terminal comprises the following steps:
s01, constructing a broadcasting control platform;
s02, connecting a screen throwing terminal;
s03, the broadcasting control platform is adapted to the resolution of the screen throwing terminal to issue the content.
As a possible implementation manner, in the scheme S01, the broadcast control platform is further built through a B/S architecture; s02, the broadcasting control platform is connected with the screen throwing terminal through a connecting terminal, and the broadcasting control platform is in communication connection with the connecting terminal; in S03, the broadcasting control platform distributes the content to the connection terminal, and the connection terminal controls the screen throwing terminal to broadcast.
As a preferred implementation choice, in S03, the connection terminal is preferably connected to the screen-throwing terminal through a communication protocol adapted to the screen-throwing terminal, and controls the playing of the screen-throwing terminal in an asynchronous or synchronous manner.
As a preferred implementation option, preferably, the connection terminal is connected to the screen-throwing terminal through a standard high-definition signal protocol or an internet of things unified standard protocol MQTT.
As a preferred implementation choice, in S02, the method for connecting the screen-throwing terminal is preferably as follows:
s021, constructing an SDK library of the screen-throwing terminal;
s022, responding to the butt joint operation of the connection screen terminal, obtaining information of the screen terminal, calling an SDK library of the screen terminal, pre-configuring one SDK, and then outputting a test signal;
s023, continuously maintaining the receiving of the response information of the screen-throwing terminal in the preset time period,
when receiving, configuring the SDK corresponding to the test data to be in butt joint with the screen projection terminal,
and when the response information is not received, recalling and configuring other SDKs in the SDK library of the screen throwing terminal, and then continuing to output the test data until the response information is received.
As a preferred implementation choice, in S03, the screen-throwing terminal outputs the content released by the broadcast control platform in an interface replacement manner, and the replaced interface is output by the broadcast control platform.
As a preferred implementation choice, in S03, the method for controlling the playing of the screen-throwing terminal by the connection terminal includes:
s311, obtaining resolution information of a screen throwing terminal through a connecting terminal;
s312, the playing control platform correspondingly calculates the pulling-up proportion required by full-screen filling picture according to the resolution information of the screen throwing terminal,
when the transverse or longitudinal stretching proportion is lower than a preset stretching parameter or higher than a preset 1/preset stretching parameter, content release is carried out in a full-screen filling mode;
when the transverse or longitudinal stretching ratio is higher than the preset stretching parameter or lower than 1/preset stretching parameter, jumping to S313;
s313, calculating the screen occupation ratio of the picture stretched according to the original proportion limit by taking the longitudinal resolution of the screen projection terminal as a limit value,
when the proportion of the horizontal or longitudinal screen is lower than a preset duty ratio parameter, content release is carried out in a stretching and centering mode according to the original proportion;
when the horizontal or vertical screen duty ratio is higher than the preset duty ratio parameter, jumping to S314;
s314, transversely and/or longitudinally dividing the screen projection terminal into N display areas, setting each divided display area as an independent display area, and then repeating the steps S312 and S313 by taking the display area as a content delivery area to release the content.
As a preferred implementation choice, in S0314, the display area is formed by dividing the projection terminal into horizontal and/or vertical equal parts or unequal parts, and when the display area is formed by dividing the unequal parts, 1 pixel point is sequentially discarded from the display area of the display terminal in the order of right, left, front, back, top and bottom, and then the display area of the display terminal is reselected.
Based on the above scheme, the invention also provides a self-adaptive docking system of the screen-throwing terminal, which comprises:
the remote server is configured to be used for building a broadcast control platform and providing screen throwing content;
the screen throwing terminal is used for visually outputting screen throwing content;
and the connection terminal is configured to be connected with the screen projection terminal, receives the screen projection content issued by the remote server and transmits the screen projection content to the screen projection terminal.
Based on the above scheme, the invention also provides a computer readable storage medium, wherein at least one instruction, at least one section of program, code set or instruction set is stored in the storage medium, and the at least one instruction, the at least one section of program, the code set or the instruction set is loaded and executed by a processor to realize the screen projection terminal self-adaption butting method.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that: according to the scheme, content is put into the screen throwing terminal through the broadcasting control platform, the connection terminal is combined to be in butt joint with the screen throwing terminal, when the connection terminal is in butt joint with the screen throwing terminal, a communication protocol adaptive to the screen throwing terminal is adopted, after the screen throwing content issued by the broadcasting control platform is received through the connection terminal, the screen throwing content is put into the screen throwing terminal to be displayed and played, interference caused by an original broadcasting control private protocol and an irregular standard can be avoided, unified management of electronic display is achieved, meanwhile, inserting of external illegal signals can be stopped based on a safety communication protocol established between the connection terminal and the screen throwing terminal, safety of a broadcasting control system is improved, in addition, the scheme can not change a screen throwing mechanism of the original screen throwing terminal, adaptive pressure caused by changing of the screen throwing mechanism is avoided, new management risks are avoided being introduced, the scheme can be suitable for screen throwing mechanism reconstruction of the original screen throwing terminal, display screen control cards, display screen modules and other equipment are replaced as much as possible, and reconstruction cost is greatly reduced on the reconstruction level.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of the method of the present invention;
fig. 2 is a schematic diagram of a simplified connection of the system of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present invention, but do not limit the scope of the present invention. Likewise, the following examples are only some, but not all, of the examples of the present invention, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present invention.
As shown in fig. 1, the adaptive docking method of the screen projection terminal includes:
s01, constructing a broadcasting control platform;
s02, connecting a screen throwing terminal;
s03, the broadcasting control platform is adapted to the resolution of the screen throwing terminal to issue the content.
In order to improve connection reliability and stability, in the scheme S01, a broadcast control platform is built through a B/S architecture; s02, the broadcasting control platform is connected with the screen throwing terminal through a connecting terminal, and the broadcasting control platform is in communication connection with the connecting terminal; in S03, the broadcasting control platform distributes the content to the connection terminal, and the connection terminal controls the screen throwing terminal to broadcast.
According to the scheme, the connection terminal is used for connecting the screen throwing terminal, communication protocol adaptation and SDK adaptation are compatible or paired with the screen throwing terminal through the connection terminal, so that the screen throwing terminal can be managed uniformly, release content of the broadcast control platform is received through the connection terminal, and the stability and continuity of content input and output of the screen throwing terminal can be improved.
The function of the connection terminal is only to receive the playing content issued by the playing control platform and transmit the playing content to the screen throwing terminal, and establish an adaptive communication protocol with the screen throwing terminal, so that the connection terminal with the function has market and sales, and the specific working principle and details of the connection terminal are not repeated.
In the playing control aspect, the connection terminal is in communication connection with the screen throwing terminal through a communication protocol which is adaptive to the screen throwing terminal, and controls the screen throwing terminal to play in an asynchronous or synchronous mode, and preferably, the connection terminal is connected with the screen throwing terminal through a standard high definition signal protocol or an Internet of things communication unified standard protocol MQTT.
In the adaptive scheme connected with the connection terminal, in the scheme S02, the method for connecting the screen-throwing terminal is as follows:
s021, constructing an SDK library of the screen-throwing terminal;
s022, responding to the butt joint operation of the connection screen terminal, obtaining information of the screen terminal, calling an SDK library of the screen terminal, pre-configuring one SDK, and then outputting a test signal;
s023, continuously maintaining the receiving of the response information of the screen-throwing terminal in the preset time period,
when receiving, configuring the SDK corresponding to the test data to be in butt joint with the screen projection terminal,
and when the response information is not received, recalling and configuring other SDKs in the SDK library of the screen throwing terminal, and then continuing to output the test data until the response information is received.
By the method, the connection adaptation of the connection terminal and the screen projection terminal can be more humanized and efficient, and the technical effect of automatic configuration of the SDK is achieved to a certain extent.
In the aspect of content playing, in the scheme S03, the screen-throwing terminal outputs the content released by the playing control platform in an interface replacement manner, and the replaced interface is output by the playing control platform.
In order to adapt to the resolution of the screen-throwing terminal and provide more diversified content display, in the scheme S03, the method for controlling the screen-throwing terminal to play by the connection terminal is as follows:
s311, obtaining resolution information of a screen throwing terminal through a connecting terminal;
s312, the playing control platform correspondingly calculates the pulling-up proportion required by full-screen filling picture according to the resolution information of the screen throwing terminal,
when the transverse or longitudinal stretching proportion is lower than a preset stretching parameter or higher than a preset 1/preset stretching parameter, content release is carried out in a full-screen filling mode;
when the transverse or longitudinal stretching ratio is higher than the preset stretching parameter or lower than 1/preset stretching parameter, jumping to S313;
s313, calculating the screen occupation ratio of the picture stretched according to the original proportion limit by taking the longitudinal resolution of the screen projection terminal as a limit value,
when the proportion of the horizontal or longitudinal screen is lower than a preset duty ratio parameter, content release is carried out in a stretching and centering mode according to the original proportion;
when the horizontal or vertical screen duty ratio is higher than the preset duty ratio parameter, jumping to S314;
s314, transversely and/or longitudinally dividing the screen projection terminal into N display areas, setting each divided display area as an independent display area, and then repeating the steps S312 and S313 by taking the display area as a content delivery area to release the content.
According to the scheme, the content played by the screen-throwing terminal can be suitable for the resolution of the screen-throwing terminal to display the content, so that the played content picture is more coordinated and accurate, and abnormal conditions such as picture deformation and the like when the screen-throwing terminal plays the content with the original playing content due to different resolutions or picture sizes are avoided; in order to adapt to some large screens, the scheme also divides the display area of the screen-throwing terminal into a plurality of display areas, and then plays the screen-throwing content by respectively establishing independent screen-throwing areas for the plurality of display areas, thereby being beneficial to content insertion or content release of business information delivery. In S0314, the display area is preferably divided into horizontal and/or vertical halves or unequal halves for the projection terminal, and when the display area is divided into unequal halves, 1 pixel point is sequentially discarded from the display area of the display terminal in the order of right, left, front, back, top, and bottom, and then the display area of the display terminal is reselected.
As shown in fig. 2, based on the above method, the present solution further provides a screen-projection terminal adaptive docking system, which is characterized in that it includes:
the remote server is configured to be used for building a broadcast control platform and providing screen throwing content;
the screen throwing terminal is used for visually outputting screen throwing content;
and the connection terminal is configured to be connected with the screen projection terminal, receives the screen projection content issued by the remote server and transmits the screen projection content to the screen projection terminal.
In addition, the method of the present invention may be further loaded in a storage medium, and the present invention further provides a computer readable storage medium, where at least one instruction, at least one section of program, a code set, or an instruction set is stored in the storage medium, where the at least one instruction, at least one section of program, the code set, or the instruction set is loaded and executed by a processor to implement the adaptive docking method of a screen-projection terminal.
In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing description is only a partial embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes using the descriptions and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (8)
1. The self-adaptive docking method of the screen-throwing terminal is characterized by comprising the following steps of:
s01, constructing a broadcast control platform, wherein the broadcast control platform is constructed through a B/S architecture;
s02, the broadcasting control platform is connected with the screen throwing terminal through a connecting terminal, and the broadcasting control platform is in communication connection with the connecting terminal;
s03, the broadcasting control platform adapts to the resolution of the screen throwing terminal, content is distributed to the connecting terminal, and the connecting terminal controls the screen throwing terminal to distribute and play the content;
in S02, the method for connecting the screen-throwing terminal includes:
s021, constructing an SDK library of the screen-throwing terminal;
s022, responding to the butt joint operation of the connection screen terminal, obtaining information of the screen terminal, calling an SDK library of the screen terminal, pre-configuring one SDK, and then outputting a test signal;
s023, continuously maintaining the receiving of the response information of the screen-throwing terminal in the preset time period,
when receiving, configuring the SDK corresponding to the test signal to be in butt joint with the screen projection terminal,
and when the response information is not received, recalling and configuring other SDKs in the SDK library of the screen throwing terminal, and then continuously outputting the test signal until the response information is received.
2. The adaptive docking method of a screen projection terminal according to claim 1, wherein in S03, the connection terminal is communicatively connected to the screen projection terminal through a communication protocol adapted to the screen projection terminal, and controls the screen projection terminal to play in an asynchronous or synchronous manner.
3. The method for adaptively interfacing a screen-throwing terminal according to claim 2, wherein the connection terminal is connected with the screen-throwing terminal through a standard high definition signal protocol or an internet of things communication unified standard protocol MQTT.
4. The adaptive docking method of a screen-throwing terminal according to claim 1, wherein in S03, the screen-throwing terminal outputs the content issued by the broadcast control platform in an interface replacement manner, and the replaced interface is output by the broadcast control platform.
5. The adaptive docking method of a screen projection terminal according to claim 1, wherein in S03, the method for controlling the screen projection terminal to play by the connection terminal is as follows:
s311, obtaining resolution information of a screen throwing terminal through a connecting terminal;
s312, the playing control platform correspondingly calculates the stretching proportion required by full-screen filling pictures according to the resolution information of the screen throwing terminal,
when the transverse or longitudinal stretching ratio is lower than the preset stretching parameter or higher than 1/preset stretching parameter, content release is carried out in a full-screen filling mode;
when the transverse or longitudinal stretching ratio is higher than the preset stretching parameter or lower than 1/preset stretching parameter, jumping to S313;
s313, calculating the screen occupation ratio of the picture stretched according to the original proportion limit by taking the longitudinal resolution of the screen projection terminal as a limit value,
when the occupation ratio of the transverse or longitudinal screen is lower than a preset occupation ratio parameter, content release is carried out in a stretching and centering mode according to the original proportion;
jumping to S314 when the horizontal or vertical screen occupation ratio is higher than the preset occupation ratio parameter;
s314, transversely and/or longitudinally dividing the screen projection terminal into N display areas, setting each divided display area as an independent display area, and then repeating the steps S312 and S313 by taking the display area as a content delivery area to release the content.
6. The adaptive docking method of a screen terminal according to claim 5, wherein in S314, the display area is divided into horizontal and/or vertical halves or unequal halves, and when the display area is divided into unequal halves, 1 pixel point is sequentially discarded from the display area of the screen terminal in order of right-front, left-front, down-front and up-front, and then the display area of the screen terminal is reselected.
7. A screen-projection terminal adaptive docking system loaded with the screen-projection terminal adaptive docking method according to one of claims 1 to 6, the docking system comprising:
the remote server is configured to be used for building a broadcast control platform and providing screen throwing content;
the screen throwing terminal is used for visually outputting screen throwing content;
and the connection terminal is configured to be connected with the screen projection terminal, receives the screen projection content issued by the remote server and transmits the screen projection content to the screen projection terminal.
8. A computer-readable storage medium, characterized by: at least one instruction, at least one program, a code set or an instruction set is stored in the storage medium, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement the self-adaptive docking method of the screen-throwing terminal according to one of claims 1 to 6.
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| CN202111427331.XA CN114157891B (en) | 2021-11-26 | 2021-11-26 | Self-adaptive docking method, system and storage medium for screen-throwing terminal |
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| CN202111427331.XA CN114157891B (en) | 2021-11-26 | 2021-11-26 | Self-adaptive docking method, system and storage medium for screen-throwing terminal |
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| CN114157891B true CN114157891B (en) | 2024-03-22 |
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| CN107493484A (en) * | 2017-08-18 | 2017-12-19 | 三星电子（中国）研发中心 | System, method and apparatus for projection screen |
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| CN111651366A (en) * | 2020-07-06 | 2020-09-11 | Oppo广东移动通信有限公司 | SDK test method, device, equipment and storage medium |
| CN112612433A (en) * | 2020-12-09 | 2021-04-06 | 深圳乐播科技有限公司 | Screen projection method, device and system for vertical screen video |
| CN113056031A (en) * | 2021-02-01 | 2021-06-29 | 广州朗国电子科技有限公司 | Method for establishing wireless screen projection connection |
| CN113542841A (en) * | 2021-06-16 | 2021-10-22 | 杭州当贝网络科技有限公司 | Screen projection method and screen projection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20140310590A1 (en) * | 2013-03-13 | 2014-10-16 | Bby Solutions, Inc. | Presentation layer software development kit for creation of dynamic webpages |
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| CN107493484A (en) * | 2017-08-18 | 2017-12-19 | 三星电子（中国）研发中心 | System, method and apparatus for projection screen |
| CN209182811U (en) * | 2018-09-12 | 2019-07-30 | 深圳市壹顺科科技有限公司 | A kind of mobile terminal throwing screen device |
| CN111651366A (en) * | 2020-07-06 | 2020-09-11 | Oppo广东移动通信有限公司 | SDK test method, device, equipment and storage medium |
| CN112612433A (en) * | 2020-12-09 | 2021-04-06 | 深圳乐播科技有限公司 | Screen projection method, device and system for vertical screen video |
| CN113056031A (en) * | 2021-02-01 | 2021-06-29 | 广州朗国电子科技有限公司 | Method for establishing wireless screen projection connection |
| CN113542841A (en) * | 2021-06-16 | 2021-10-22 | 杭州当贝网络科技有限公司 | Screen projection method and screen projection system |
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