CN108391161A - A kind of cross-platform wireless throwing screen method - Google Patents
A kind of cross-platform wireless throwing screen method Download PDFInfo
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- CN108391161A CN108391161A CN201810116649.8A CN201810116649A CN108391161A CN 108391161 A CN108391161 A CN 108391161A CN 201810116649 A CN201810116649 A CN 201810116649A CN 108391161 A CN108391161 A CN 108391161A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 238000004891 communication Methods 0.000 claims abstract description 23
- 230000004044 response Effects 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 6
- 230000008707 rearrangement Effects 0.000 claims description 6
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008140 language development Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
-
- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention is a kind of cross-platform wireless throwing screen method, this method defines the receiving terminal of the transmitting terminal and receiving device picture of transmitting equipment picture respectively, the transmitting terminal is accessed with receiving terminal and is connected in unified network and between each other by corresponding communications protocol, and it by equipment discovery phase, throws screen mounting phase, media transmission stage and throws screen ending phase, the Mirror Info for carrying out screen by way of network transmission in LAN is shared.The present invention can realize the projection of screen between different platform, and transplantability, versatility and professional platform independence are more preferable, and scene adaptability is more preferably.
Description
Technical field
The present invention relates to intelligent terminal interconnection technique fields, and in particular to a kind of cross-platform wireless throwing screen method.
Background technology
With popularizing for intelligent terminal, more and more people all using computer, handle official business by mobile phone, tablet, entertains, and learns
It practises, the desktop mirror image in terminal is shared with other people is illustrated in amusement, handles official business, and the scenes such as live streaming have huge effect.Due to people
Life is more and more closer with the connection of network, need to be connected to each other between device, the chance of exchanging contents it is more and more.Traditional
Using obviously cannot be satisfied mobility, the requirement of convenience by the way of the physical connections such as VGA/HDMI/DVI.
WIFI alliances release Miracast agreements in recent years, are based on so as to be established between multimedia equipment and maintain one
The connection of WIFI, and promote video and audio to be played in the presentation of target device using this connection；Apple Inc. is proposed
Airplay agreements, ipad, the desktop images of iphone equipment can be shared Airplay receiving terminals by it.
Miracast agreements greatly facilitate screen with the release of Airplay agreements and share, but are all limited.Currently
Miracast equipment is short of in terms of stability and compatibility in the market, and how variant the realization of each manufacturer is also, and
Miracast equipment on current market does not support multichannel to project, current Miracast transmitting terminals be mainly Android 4.2 with
On mobile phone or ipad and windows8 or more PC, network interface card must support wifip2p；Airplay agreements then have envelope
Closing property is the undocumented agreement of Apple Inc. so that its application also has certain limitation, and itself does not also support multichannel
Throw screen.And it can not mutual projection image before the equipment of different platform.
The present invention proposes a kind of cross-platform terminal room by network connection and carries out the method that screen shares, and passes through this method
User can carry out multi-person conference, and multiplayer, multi-person synergy office, file-sharing, time delay is short, and performance is stablized, and clarity is high.
And it is easy to be transplanted on other embedded platform machines.It can be in ios, android, windows, the mainstreams such as linux
Intercommunication is realized in system.
Invention content
The object of the present invention is to overcome the problems of the prior art, provides a kind of cross-platform wireless throwing screen method.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme：
A kind of cross-platform wireless throwing screen method, this method define the transmitting terminal and receiving device picture for emitting equipment picture respectively
Receiving terminal, the transmitting terminal and receiving terminal are accessed and are connected in unified network and between each other by corresponding communications protocol,
Wherein, this method includes following stage etch：
Step 1）Equipment discovery phase, transmitting terminal search for the receiving terminal in network automatically, obtain the response message of receiving terminal, and with
The receiving terminal of all responses is safeguarded and shown to list mode；
Step 2）Screen mounting phase is thrown, transmitting terminal selectes several receiving terminals in receiving terminal list as throwing screen object, transmitting terminal
Emit picture and throw screen request message to selected receiving terminal, receiving terminal determines whether to access, if allowing to access, completes matchmaker
The negotiation of body end mouth starts the media transmission stage of next stage step, if not allowing to access, user is prompted to throw screen failure；
Step 3）Media transmission stage, transmitting terminal and receiving terminal enter medium data acquisition, transmission and the process of presentation, transmitting terminal
Receiving terminal is sent to after capture apparatus picture and coding, receiving terminal is decoded broadcasting to the information received, repeats above-mentioned matchmaker
Volume data acquisition, transmission and the process presented, until terminating to enter next stage step；
Step 4）Screen ending phase is thrown, by transmitting terminal or receiving terminal as initiator, sends and throws screen end message to another party, separately
One side replys after receiving throws screen end confirmation message to initiator, throws screen and terminates, transmitting terminal and receiving terminal recovery port resource.
Further, the step 1）In, equipment discovery phase is as follows：
Step 1.1）After transmitting terminal and receiving terminal normal operation, receiving terminal persistently monitors a port K appointed；
Step 1.2）Transmitting terminal is periodically sent in detection broadcast discovery message to network, and destination interface is the port
K；
Step 1.3）One response device_ of reply after discovery message is broadcasted in the detection that receiving terminal receives transmitting terminal
Info_rsp message carries the IP address of receiving terminal in the response device_Info_rsp message, communication port, sets
Standby name and equipment unique identification information；
Step 1.4）After transmitting terminal receives the response device_Info_rsp message, receiving terminal list is safeguarded and shown, if
Transmitting terminal receives the response device_Info_rsp message of multiple receiving terminals, then transmitting terminal is safeguarded and shown with list mode
The receiving terminal of all responses.
Further, the step 2）In, it throws screen mounting phase and is as follows：
Step 2.1）Transmitting terminal sends setup message to the communication port of receiving terminal, and the communication port passes through step 1.3）It obtains
It takes, the setup message carries the transmission resolution ratio of the local ports RTP and local desktop mirror image video；
Step 2.2）After receiving terminal receives the setup message in communication port, determine whether to access, and reply
Setup_rsp message is to transmitting terminal, and the setup_rsp message carries the media communication port of receiving terminal and access responds
Code；
Step 2.3）After transmitting terminal receives the setup_rsp message, if judging, receiving terminal agrees to access, enters media transmission
Otherwise stage prompts user to throw screen failure.
Further, the step 3）In, the media transmission stage includes transmitting terminal media transmission step and receiving terminal media
Transmitting step, wherein
Steps are as follows for the transmitting terminal media transmission：
Step 3.1）Transmitting terminal is according to the corresponding interface timing capture apparatus screen-picture provided on equipment platform；
Step 3.2）H264 codings are carried out to screen-picture；
Step 3.3）Media data after being encoded to H264 carries out FEC algorithm process, for occurring under packet drop in network
It can restore screen-picture；
Step 3.4）It will treated that media data is packaged into RTP packets is transferred to receiving terminal；
Repeat the above steps 3.1）To step 3.4）；
Steps are as follows for the receiving terminal media transmission：
Step 3.5）Receiving terminal collects the media data of media communication port；
Step 3.6）Group RTP packets, and carry out out of order rearrangement；
Step 3.7）By step 3.6）In treated media data be sent into H264 decoders, decoded media data is broadcast
It puts.
Further, the step 3.6）In, when carrying out out of order rearrangement, while packet loss is judged whether there is, the feelings of packet loss
FEC algorithm process is used under condition.
The beneficial effects of the invention are as follows:
The transmitting terminal and receiving terminal of the present invention can be separately operable in the system of different platform, can be real between different platform
The projection of existing screen, and transplantability is good, while the method for the present invention can support a transmitting terminal to be emitted to multiple receptions well
End, multiple transmitting terminals are emitted to application scenarios as a receiving terminal, relative to miracast, the methods of airplay, this hair
Bright throwing screen method is more general, and professional platform independence is more preferable, and scene adaptability is more preferably.
Description of the drawings
Fig. 1 is the equipment discovery phase schematic diagram of the present invention；
Fig. 2 is the throwing screen mounting phase schematic diagram of the present invention；
Fig. 3 is the transmitting terminal media transmission stage schematic diagram of the present invention；
Fig. 4 is the receiving terminal media transmission stage schematic diagram of the present invention；
Fig. 5 is the throwing screen ending phase schematic diagram of the present invention.
Specific implementation mode
It is below with reference to the accompanying drawings and in conjunction with the embodiments, next that the present invention will be described in detail.
A kind of cross-platform wireless throwing screen method, this method defines the transmitting terminal of transmitting equipment picture respectively and receiving device is drawn
The receiving terminal in face, the transmitting terminal and receiving terminal access to be connected in unified network and between each other by corresponding communications protocol
It connects, in the present embodiment, the optional BJCast agreements of communications protocol, transmitting terminal and receiving terminal can access unification using wifi modes
Network in, can also be accessed in unified network using RJ45 interfaces, wherein this method includes following stage etch：
Step 1）Equipment discovery phase, transmitting terminal search for the receiving terminal in network automatically, obtain the response message of receiving terminal, and with
The receiving terminal of all responses is safeguarded and shown to list mode；
Step 2）Screen mounting phase is thrown, transmitting terminal selectes several receiving terminals in receiving terminal list as throwing screen object, transmitting terminal
Emit picture and throw screen request message to selected receiving terminal, receiving terminal determines whether to access, if allowing to access, completes matchmaker
The negotiation of body end mouth starts the media transmission stage of next stage step, if not allowing to access, user is prompted to throw screen failure；
Step 3）Media transmission stage, transmitting terminal and receiving terminal enter medium data acquisition, transmission and the process of presentation, transmitting terminal
Receiving terminal is sent to after capture apparatus picture and coding, receiving terminal is decoded broadcasting to the information received, repeats above-mentioned matchmaker
Volume data acquisition, transmission and the process presented, until terminating to enter next stage step；
Step 4）Screen ending phase is thrown, by transmitting terminal or receiving terminal as initiator, sends and throws screen end message to another party, separately
One side replys after receiving throws screen end confirmation message to initiator, throws screen and terminates, transmitting terminal and receiving terminal recovery port resource.
As shown in Figure 1, the step 1）In, equipment discovery phase is as follows：
Step 1.1）After transmitting terminal and receiving terminal normal operation, receiving terminal persistently monitors a port K appointed, the present embodiment
Middle port K selection ports 9089；
Step 1.2）Transmitting terminal is periodically sent in detection broadcast discovery message to network, and destination interface is port 9089；
Step 1.3）One response device_ of reply after discovery message is broadcasted in the detection that receiving terminal receives transmitting terminal
Info_rsp message carries the IP address of receiving terminal in the response device_Info_rsp message, communication port, sets
Standby name and equipment unique identification information；
Step 1.4）After transmitting terminal receives the response device_Info_rsp message, receiving terminal list is safeguarded and shown, if
Transmitting terminal receives the response device_Info_rsp message of multiple receiving terminals, then transmitting terminal is safeguarded and shown with list mode
The receiving terminal of all responses.
As shown in Fig. 2, the step 2）In, it throws screen mounting phase and is as follows：
Step 2.1）Transmitting terminal sends setup message to the communication port of receiving terminal, and the communication port passes through step 1.3）It obtains
It takes, the setup message carries the transmission resolution ratio of the local ports RTP and local desktop mirror image video；
Step 2.2）It after receiving terminal receives the setup message in communication port, determines whether to access, allows to access plan
Slightly can be maximum in the present embodiment to support 4 road receiving terminals of access according to the design of concrete application, then it can not just be connect more than behind 4 tunnels
Enter, and reply setup_rsp message to transmitting terminal, the setup_rsp message carry receiving terminal media communication port and
Access answer code；
Step 2.3）After transmitting terminal receives the setup_rsp message, if judging, receiving terminal agrees to access, enters media transmission
Otherwise stage prompts user to throw screen failure.
The step 3）In, the media transmission stage includes transmitting terminal media transmission step and receiving terminal media transmission step,
Wherein,
As shown in figure 3, steps are as follows for the transmitting terminal media transmission：
Step 3.1）Transmitting terminal is according to the corresponding interface timing capture apparatus screen-picture provided on equipment platform, in the present embodiment
It is 40ms to be chosen if frame per second is configured to 25 in timing, and when capture apparatus screen-picture, the system SDK of windows, linux are
The corresponding interface is provided, android5.0 or more has also opened relevant interface, is then needed on ios platforms in acquisition by one
Airplay receives service to carry out video acquisition；
Step 3.2）H264 codings are carried out to screen-picture；
Step 3.3）Media data after being encoded to H264 carries out FEC algorithm process, for occurring under packet drop in network
It can restore screen-picture；
Step 3.4）It will treated that media data is packaged into RTP packets is transferred to receiving terminal；
Repeat the above steps 3.1）To step 3.4）；
As shown in figure 4, steps are as follows for the receiving terminal media transmission：
Step 3.5）Receiving terminal collects the media data of media communication port；
Step 3.6）Group RTP packets, and carry out out of order rearrangement；
Step 3.7）By step 3.6）In treated media data be sent into H264 decoders, decoded media data is broadcast
It puts.
The step 3.6）In, when carrying out out of order rearrangement, while packet loss is judged whether there is, is used in the case of packet loss
FEC algorithm process.
Terminate to be initiated by transmitting terminal as shown in figure 5, throwing screen, can also be initiated by receiving terminal, need the side terminated
Hangup message is sent, hangup_rsp message is replied in opposite end after receiving message, after, transmitting terminal and receiving terminal need to recycle
The resources such as port.
The scene of a transmitting terminal and the one-to-one projection video pictures of receiving terminal is introduced in above-described embodiment；One
The scene that receiving terminal receives multiple transmitting terminals is consistent in agreement flow with above-described embodiment, and receiving terminal is playing at this time
It may be used picture synthesis when multichannel picture, poll plays etc., and strategies are presented；The method of the present invention can naturally support one
Receiving terminal receives the projection image of multichannel transmitting terminal, for example allows 4 tunnels of maximum allowable support in access strategy in the present embodiment
Transmitting terminal accesses；In addition theoretically, the method for the present invention is also easy to expand to a transmitting terminal while projecting multiple receiving terminals
Scene, i.e. the method for the present invention can support a transmitting terminal to be emitted to multiple receiving terminals well, and multiple transmitting terminals are emitted to one
Application scenarios as a receiving terminal, in addition, the core of the method for the present invention can use c language developments, can aspect shifting
Plant the platforms such as arm.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of cross-platform wireless throwings screen method, which is characterized in that this method define respectively emit the transmitting terminal of equipment picture with
The receiving terminal of receiving device picture, the transmitting terminal and receiving terminal access in unified network and between each other by corresponding
Communications protocol connects, wherein this method includes following stage etch：
Step 1）Equipment discovery phase, transmitting terminal search for the receiving terminal in network automatically, obtain the response message of receiving terminal, and with
The receiving terminal of all responses is safeguarded and shown to list mode；
Step 2）Screen mounting phase is thrown, transmitting terminal selectes several receiving terminals in receiving terminal list as throwing screen object, transmitting terminal
Emit picture and throw screen request message to selected receiving terminal, receiving terminal determines whether to access, if allowing to access, completes matchmaker
The negotiation of body end mouth starts the media transmission stage of next stage step, if not allowing to access, user is prompted to throw screen failure；
Step 3）Media transmission stage, transmitting terminal and receiving terminal enter medium data acquisition, transmission and the process of presentation, transmitting terminal
Receiving terminal is sent to after capture apparatus picture and coding, receiving terminal is decoded broadcasting to the information received, repeats above-mentioned matchmaker
Volume data acquisition, transmission and the process presented, until terminating to enter next stage step；
Step 4）Screen ending phase is thrown, by transmitting terminal or receiving terminal as initiator, sends and throws screen end message to another party, separately
One side replys after receiving throws screen end confirmation message to initiator, throws screen and terminates, transmitting terminal and receiving terminal recovery port resource.
2. cross-platform wireless throwing screen method according to claim 1, which is characterized in that the step 1）In, equipment is found
Stage is as follows：
Step 1.1）After transmitting terminal and receiving terminal normal operation, receiving terminal persistently monitors a port K appointed；
Step 1.2）Transmitting terminal is periodically sent in detection broadcast discovery message to network, and destination interface is the port
K；
Step 1.3）One response device_ of reply after discovery message is broadcasted in the detection that receiving terminal receives transmitting terminal
Info_rsp message carries the IP address of receiving terminal in the response device_Info_rsp message, communication port, sets
Standby name and equipment unique identification information；
Step 1.4）After transmitting terminal receives the response device_Info_rsp message, receiving terminal list is safeguarded and shown, if
Transmitting terminal receives the response device_Info_rsp message of multiple receiving terminals, then transmitting terminal is safeguarded and shown with list mode
The receiving terminal of all responses.
3. cross-platform wireless throwing screen method according to claim 2, which is characterized in that the step 2）In, it throws screen and initiates
Stage is as follows：
Step 2.1）Transmitting terminal sends setup message to the communication port of receiving terminal, and the communication port passes through step 1.3）It obtains
It takes, the setup message carries the transmission resolution ratio of the local ports RTP and local desktop mirror image video；
Step 2.2）After receiving terminal receives the setup message in communication port, determine whether to access, and reply
Setup_rsp message is to transmitting terminal, and the setup_rsp message carries the media communication port of receiving terminal and access responds
Code；
Step 2.3）After transmitting terminal receives the setup_rsp message, if judging, receiving terminal agrees to access, enters media transmission
Otherwise stage prompts user to throw screen failure.
4. cross-platform wireless throwing screen method according to claim 3, which is characterized in that the step 3）In, media transmission
Stage includes transmitting terminal media transmission step and receiving terminal media transmission step, wherein
Steps are as follows for the transmitting terminal media transmission：
Step 3.1）Transmitting terminal is according to the corresponding interface timing capture apparatus screen-picture provided on equipment platform；
Step 3.2）H264 codings are carried out to screen-picture；
Step 3.3）Media data after being encoded to H264 carries out FEC algorithm process, for occurring under packet drop in network
It can restore screen-picture；
Step 3.4）It will treated that media data is packaged into RTP packets is transferred to receiving terminal；
Repeat the above steps 3.1）To step 3.4）；
Steps are as follows for the receiving terminal media transmission：
Step 3.5）Receiving terminal collects the media data of media communication port；
Step 3.6）Group RTP packets, and carry out out of order rearrangement；
Step 3.7）By step 3.6）In treated media data be sent into H264 decoders, decoded media data is broadcast
It puts.
5. cross-platform wireless throwing screen method according to claim 4, which is characterized in that the step 3.6）In, carry out
When out of order rearrangement, while packet loss is judged whether there is, FEC algorithm process is used in the case of packet loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810116649.8A CN108391161A (en) | 2018-02-06 | 2018-02-06 | A kind of cross-platform wireless throwing screen method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810116649.8A CN108391161A (en) | 2018-02-06 | 2018-02-06 | A kind of cross-platform wireless throwing screen method |
Publications (1)
| Publication Number | Publication Date |
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| CN108391161A true CN108391161A (en) | 2018-08-10 |
Family
ID=63075248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810116649.8A Pending CN108391161A (en) | 2018-02-06 | 2018-02-06 | A kind of cross-platform wireless throwing screen method |
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| CN110166823A (en) * | 2019-06-26 | 2019-08-23 | 北京奇艺世纪科技有限公司 | Throw screen method and relevant apparatus |
| CN111601121A (en) * | 2020-04-28 | 2020-08-28 | 西安万像电子科技有限公司 | Equipment connection method and system in wireless video transmission system |
| WO2024082435A1 (en) * | 2022-10-21 | 2024-04-25 | 湖南快乐阳光互动娱乐传媒有限公司 | Information prompting method and apparatus |
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Application publication date: 20180810 |