CN114501120B - Multi-terminal wireless screen switching method and electronic equipment - Google Patents
Multi-terminal wireless screen switching method and electronic equipment Download PDFInfo
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- CN114501120B CN114501120B CN202210027915.6A CN202210027915A CN114501120B CN 114501120 B CN114501120 B CN 114501120B CN 202210027915 A CN202210027915 A CN 202210027915A CN 114501120 B CN114501120 B CN 114501120B
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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
- 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]
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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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a multi-terminal wireless screen switching method, which comprises the following steps: when the screen is required to be switched to the destination source end equipment, triggering the sink end equipment to reenter the wireless point-to-point pairing process by the current source end equipment through a screen switching instruction, and only establishing connection between the matched destination source end equipment and the sink end equipment by utilizing the screen switching instruction; wherein: when the current source terminal equipment screen recording codes are changed into TS streams, private data fields of the TS streams are used for coding screen switching instructions, and the screen switching instructions comprise PIN codes. The invention also discloses a multi-terminal wireless screen switching method, which comprises the following steps: when the screen is required to be switched to the destination source end equipment, the sink end equipment receives a screen switching instruction sent by the current source end equipment to trigger a wireless point-to-point pairing process to be re-entered, and only the matched destination source end equipment and the sink end equipment are connected by the screen switching instruction. The invention also provides corresponding electronic equipment.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a multi-terminal wireless screen switching method and electronic equipment.
Background
The invention relates to a screen-throwing application scene based on a point-to-point connection mode of connectionless Wifi-direct, which is how to cause a specified source end device to throw a screen under the condition that a plurality of source end devices of the screen-throwing are preempted and connected with sink end devices. The existing wireless screen-throwing technology Miracast, screen-throwing source end equipment and sink end equipment are connected point to point based on open broadcast discovery, and TS streaming is controlled to be transmitted to sink end equipment to be played by using RTSP after screen-throwing content is coded. If there are multiple source devices to be orderly and controllably screen-cast, the common practice is to network the source devices and sink devices through a switch or a router, provide a program additionally, establish a management channel, and manage connection scheduling among the multiple devices, otherwise, the source devices will preempt the sink devices through broadcast discovery.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a scheme for switching multi-terminal wireless screen throwing, and the control of source end equipment to sink end equipment is completed by embedding a control instruction in the media stream of the screen throwing, so that orderly connection of a plurality of source end equipment and sink end equipment can be controlled without networking all the equipment, and the scheme is compatible with the existing screen throwing protocol.
In order to achieve the above object, according to one aspect of the present invention, there is provided a multi-terminal wireless screen switching method, including:
when the screen is required to be switched to the destination source end equipment, triggering the sink end equipment to reenter the wireless point-to-point pairing process by the current source end equipment through a screen switching instruction, and only establishing connection between the matched destination source end equipment and the sink end equipment by utilizing the screen switching instruction; wherein:
when the current source terminal equipment screen recording codes are changed into TS streams, private data fields of the TS streams are used for coding screen switching instructions, and the screen switching instructions comprise PIN codes.
In one embodiment of the present invention, the current source device triggers the sink device to reenter the wireless peer-to-peer pairing process through a screen switching instruction, specifically:
the current source end device sends TS stream with transport private data field to sink end device, and informs sink end device to reenter wireless point-to-point pairing process;
both the destination source end device and other source end devices, which are the source end devices except the current source end device and the destination source end device, will compete again for connection with the sink end device.
In one embodiment of the present invention, the method only establishes connection between the matched destination source device and sink device by using the screen switching instruction, specifically includes:
the PIN code is the MAC of the destination source end device, and the destination source end device and the sink end device are paired and connected through the MAC of the destination source end device.
In one embodiment of the present invention, after the destination source device establishes a connection with the sink device, if a screen is required to be cancelled, the sink device is triggered to cancel the screen by a screen cancellation instruction, where:
when the target source end equipment is recorded and encoded into TS stream, a private data field of the TS stream is used for encoding a screen throwing cancellation instruction, so that the sink end equipment can clear the PIN code stored in the sink end equipment after receiving the screen throwing cancellation instruction.
According to another aspect of the present invention, there is also provided a multi-terminal wireless screen switching method, including:
when the screen is required to be switched to the destination source end equipment, the sink end equipment receives a screen switching instruction sent by the current source end equipment to trigger a wireless point-to-point pairing process to be re-entered, and only the matched destination source end equipment and the sink end equipment are connected by the screen switching instruction; wherein:
when sink terminal equipment receives a TS stream recorded by screen coding of current source terminal equipment, a screen switching instruction is packaged in a private data field of the TS stream, and the screen switching instruction comprises a PIN code.
In one embodiment of the present invention, the sink end device receives a screen switching instruction sent by the current source end device to trigger a wireless peer-to-peer pairing process, specifically:
sink end equipment receives TS stream with transport private data field sent by current source end equipment, and sink end equipment reenters pairing procedure of wireless point-to-point.
In one embodiment of the present invention, the method for using the screen switching command to only enable the matched destination source end device to finally establish the connection includes:
and the PIN code is the MAC of the destination source terminal equipment, and the sink terminal equipment only completes pairing with the destination source equipment with the equipment MAC of the PIN code and establishes connection in the wireless point-to-point pairing process.
In one embodiment of the present invention, after the sink end device establishes a connection with a destination source end device, the sink end device receives a screen-throwing cancellation instruction sent by the destination source end device, and after receiving the screen-throwing cancellation instruction, the sink end device clears a PIN code stored in the sink end device and cancels screen throwing, where the screen-throwing cancellation instruction encapsulates a private data field in a TS stream encoded by a source end device screen recording.
In one embodiment of the present invention, after the sink end device establishes a connection with the destination source end device, if the sink end device does not receive data sent by the destination source end device in more than a preset time, the sink end device clears the PIN code stored in the sink end device.
According to another aspect of the present invention, there is also provided an electronic apparatus including: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can execute the multi-terminal wireless screen switching method.
In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
(1) The screen-throwing protocol is not required to be specially modified, and the screen-throwing protocol can be realized only by adding a control instruction channel to the existing protocol stack; meanwhile, sink end equipment in the prior art is compatible;
(2) The sink end device is transparent to all source end devices only by networking the source end devices to transfer authentication data, so that automatic screen switching of a plurality of source end devices is realized;
(3) Under the condition that the source end equipment and sink end equipment are disconnected and reconnected, the problem that the sink end equipment is preempted by the multi-source end equipment can be effectively avoided;
(4) The device is compatible with the existing screen throwing device, and the device which does not support the newly added control channel can be processed according to the original standard flow.
Drawings
Fig. 1 is a flow chart of a multi-terminal wireless screen switching method in an embodiment of the invention;
fig. 2 is a schematic diagram of a standard packet structure of a TS stream in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The invention aims to solve the problems that: (1) adding a screen throwing control channel through the existing protocol stack; (2) Through a new mechanism, the appointed source terminal equipment is put on sink terminal equipment;
the technical scheme adopted for solving the technical problems is as follows:
1. in the screen-throwing protocol stack, a TS stream is utilized to transmit a screen-throwing control instruction. When source end equipment records screen coding into TS stream, private data field coding screen-throwing control instruction (including screen-throwing switching instruction or screen-throwing cancelling instruction) of TS stream is used, analysis of private data field is added in TS stream de-multiplexing process of sink end equipment, and control instruction is identified;
2. when the screen is required to be switched to the destination source end equipment, the current source end equipment triggers the sink end equipment to reenter the wireless point-to-point pairing process through the screen switching instruction, and only the matched destination source end equipment is finally connected by the screen switching instruction.
Example 2
As shown in fig. 1, an embodiment of the present invention provides a multi-terminal wireless screen switching method, including:
when the screen is required to be switched to the destination source end equipment, triggering the sink end equipment to reenter the wireless point-to-point pairing process by the current source end equipment through a screen switching instruction, and only establishing connection between the matched destination source end equipment and the sink end equipment by utilizing the screen switching instruction; wherein:
when the current source terminal equipment screen recording codes are changed into TS streams, private data fields of the TS streams are used for coding screen switching instructions, and the screen switching instructions comprise PIN codes. As shown in fig. 2, the private data format may be organized with structured data, original "transport private data length", representing the length of the entire custom data; the structured data custom_cast_data { fixed length id, fixed instruction length, payload data }' may be defined in transport private data, the custom field is identified by the id, the screen-cast control instruction is extracted by the fixed instruction length, and the remaining data extracts the operation data corresponding to the control instruction.
Further, the current source terminal device triggers the sink terminal device to reenter the wireless point-to-point pairing process through a screen switching instruction, specifically:
the current source end device sends TS stream with transport private data field to sink end device, and informs sink end device to reenter wireless point-to-point pairing process;
both the destination source end device and other source end devices, which are the source end devices except the current source end device and the destination source end device, will compete again for connection with the sink end device.
Further, the method only enables the matched destination source end device to be connected with sink end device by using the screen switching instruction, specifically comprises the following steps:
the PIN code is the MAC of the destination source end device, and the destination source end device and the sink end device are paired and connected through the MAC of the destination source end device.
After the destination source end device establishes connection with the sink end device, if the screen is required to be canceled, triggering the sink end device to cancel the screen through a screen canceling instruction, wherein:
when the target source end equipment is recorded and encoded into TS stream, a private data field of the TS stream is used for encoding a screen throwing cancellation instruction, so that the sink end equipment can clear the PIN code stored in the sink end equipment after receiving the screen throwing cancellation instruction.
Example 3
Further, as shown in fig. 1, an embodiment of the present invention provides a multi-terminal wireless screen switching method, including:
when the screen is required to be switched to the destination source end equipment, the sink end equipment receives a screen switching instruction sent by the current source end equipment to trigger a wireless point-to-point pairing process to be re-entered, and only the matched destination source end equipment and the sink end equipment are connected by the screen switching instruction; wherein:
when sink terminal equipment receives a TS stream recorded by screen coding of current source terminal equipment, a screen switching instruction is packaged in a private data field of the TS stream, and the screen switching instruction comprises a PIN code.
Further, the sink end device receives a screen switching instruction sent by the current source end device to trigger a wireless point-to-point pairing process to be re-entered, specifically:
sink end equipment receives TS stream with transport private data field sent by current source end equipment, and sink end equipment reenters pairing procedure of wireless point-to-point.
Further, the step of using the screen switching instruction to only enable the matched destination source end device to finally establish connection includes:
and the PIN code is the MAC of the destination source terminal equipment, and the sink terminal equipment only completes pairing with the destination source equipment with the equipment MAC of the PIN code and establishes connection in the wireless point-to-point pairing process.
Further, after the sink end device establishes connection with the destination source end device, the sink end device receives a screen-throwing cancel instruction sent by the destination source end device, and after receiving the screen-throwing cancel instruction, the sink end device clears a PIN code stored in the sink end device and cancels screen throwing, wherein the screen-throwing cancel instruction is packaged in a private data field in a TS stream encoded by a source end device screen recording.
Further, after the sink end device establishes connection with the destination source end device, if the sink end device does not receive the data sent by the destination source end device in more than a preset time, the sink end device clears the PIN code stored in the sink end device.
Example 4
The embodiment of the invention provides a method for switching source end equipment 2 to throw a screen when source end equipment 1 throws the screen, and wireless screen throwing does not generally need source end equipment and sink end equipment to be connected through an intermediate AP, and is directly connected through wifi direct point-to-point. When there are multiple source end devices to be connected to sink end devices in order, additional channels are necessarily required to manage the switching between the multiple source end devices. A common implementation is to have all devices networked, using a central node to control at the application level. The invention does not need networking centralized management of all devices, and comprises the following specific steps:
step 1: when the source end device 1 switches to the source end device 2 to switch the screen under the condition of screen switching, as shown in fig. 2, in the process of encoding an audio and video stream into a TS stream, the source end device 1 adds a screen switching instruction and a PIN code in a transport private data field of the TS stream, where the PIN code is the MAC of the source end device 2.
The TS has 188 bytes per packet, and because the packet length is fixed and the packet length is short, instructions are injected into the transport private data field of the TS, so that the TS has higher real-time processing efficiency.
Step 2: source end device 1 sends a TS stream with transport private data fields to sink end device.
Step 3: in the unpacking process of a DEMUX module of the TS stream, sink end equipment is newly added with a function of analyzing private data in the unpacked TS packet header. And when the screen throwing instruction is identified, turning to step 4.
Step 4: and when the sink terminal equipment identifies the screen switching instruction and the PIN code, controlling the wifi direct to restart the p2p pairing mode.
Step 5: the sink end device reenters the discovery pairing mode. At this point either source end device 2 or source end device N will contend again for connection with sink end device as described previously.
Step 6: only the MAC of source end device 2 matches with the PIN code received by sink end device, so only source end device 2 successfully pairs with sink end device and establishes connection.
Step 7: after the sink end equipment is successfully paired, the source end equipment 2 can send a screen throwing cancel instruction at any time, so that the sink end equipment can resume the pairing mode. And (3) when the Sink terminal equipment receives the screen throwing cancellation instruction, clearing the pin code, re-entering the pairing mode, and repeating the step (1).
In summary, according to the scheme, the control channel is added on the existing protocol stack, so that the appointed source end device and sink end device are switched and paired through a new mechanism, and user experience when multiple devices compete for screen throwing is improved.
Example 5
Further, an embodiment of the present invention provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the multi-terminal wireless screen-drop switching method of the claims.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The multi-terminal wireless screen switching method is characterized by comprising the following steps of:
when the screen is required to be switched to the destination source end equipment, triggering the sink end equipment to reenter the wireless point-to-point pairing process by the current source end equipment through a screen switching instruction, and only establishing connection between the matched destination source end equipment and the sink end equipment by utilizing the screen switching instruction; wherein:
when recording screen codes of current source terminal equipment into TS streams, using private data fields of the TS streams to code screen switching instructions, wherein the screen switching instructions comprise PIN codes;
the current source terminal device triggers the sink terminal device to reenter the wireless point-to-point pairing process through a screen switching instruction, specifically: the current source end device sends TS stream with transport private data field to sink end device, and informs sink end device to reenter wireless point-to-point pairing process; both the destination source end device and other source end devices, which are the source end devices except the current source end device and the destination source end device, will compete again for connection with the sink end device.
2. The multi-terminal wireless screen switching method as claimed in claim 1, wherein the step of using the screen switching command only enables the matched destination source end device to establish a connection with the sink end device comprises the following steps:
the PIN code is the MAC of the destination source end device, and the destination source end device and the sink end device are paired and connected through the MAC of the destination source end device.
3. The multi-terminal wireless screen switching method of claim 1, wherein after the destination source end device establishes a connection with the sink end device, if the screen is required to be cancelled, the sink end device is triggered to cancel the screen by a screen cancellation instruction, wherein:
when the target source end equipment is recorded and encoded into TS stream, a private data field of the TS stream is used for encoding a screen throwing cancellation instruction, so that the sink end equipment can clear the PIN code stored in the sink end equipment after receiving the screen throwing cancellation instruction.
4. The multi-terminal wireless screen switching method is characterized by comprising the following steps of:
when the screen is required to be switched to the destination source end equipment, the sink end equipment receives a screen switching instruction sent by the current source end equipment to trigger a wireless point-to-point pairing process to be re-entered, and only the matched destination source end equipment and the sink end equipment are connected by the screen switching instruction; wherein:
when sink terminal equipment receives a TS stream formed by screen recording encoding of current source terminal equipment, a screen switching instruction is packaged in a private data field of the TS stream, and the screen switching instruction comprises a PIN code;
the sink terminal device receives a screen switching instruction sent by the current source terminal device to trigger a wireless point-to-point pairing process to be re-entered, and specifically comprises the following steps: sink end equipment receives TS stream with transport private data field sent by current source end equipment, and sink end equipment reenters pairing procedure of wireless point-to-point.
5. The multi-terminal wireless screen switching method as set forth in claim 4, wherein the step of using the screen switching command to only let the matched destination source end device finally establish a connection comprises:
and the PIN code is the MAC of the destination source terminal equipment, and the sink terminal equipment only completes pairing with the destination source equipment with the equipment MAC of the PIN code and establishes connection in the wireless point-to-point pairing process.
6. The multi-terminal wireless screen switching method of claim 4, wherein after the sink end device establishes a connection with a destination source end device, the sink end device receives a screen canceling instruction sent by the destination source end device, and after receiving the screen canceling instruction, the sink end device clears a PIN code stored in the sink end device and cancels the screen, wherein the screen canceling instruction is encapsulated in a private data field in a TS stream encoded by the source end device.
7. The multi-terminal wireless screen switching method of claim 4, wherein after the sink end device establishes a connection with a destination source end device, if the sink end device does not receive data sent by the destination source end device for more than a preset time, the sink end device clears the PIN code stored in the sink end device.
8. An electronic device, comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
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| CN112954419A (en) * | 2021-02-09 | 2021-06-11 | 海信视像科技股份有限公司 | Display device and display method |
| CN113766304A (en) * | 2021-08-23 | 2021-12-07 | 珠海格力电器股份有限公司 | Screen projection method and device, electronic equipment and storage medium |
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