CN112637648A - Mobile phone screen projection method - Google Patents
Mobile phone screen projection method Download PDFInfo
- Publication number
- CN112637648A CN112637648A CN202011523135.8A CN202011523135A CN112637648A CN 112637648 A CN112637648 A CN 112637648A CN 202011523135 A CN202011523135 A CN 202011523135A CN 112637648 A CN112637648 A CN 112637648A
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- China
- Prior art keywords
- mobile phone
- remote controller
- screen projection
- broadcast signal
- distance
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
-
- 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
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43637—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
-
- 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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44213—Monitoring of end-user related data
-
- 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
- H04N21/64—Addressing
- H04N21/6405—Multicasting
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Social Psychology (AREA)
- Databases & Information Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a screen projection method for a mobile phone, which comprises S1, arranging a digital television and the mobile phone in the same area network, S2, connecting a remote controller and a digital television Bluetooth in a matching way, S3, knocking the designated position of the remote controller by the mobile phone, S4, identifying knocking action by the remote controller through a SENSOR and triggering an omnidirectional impossible connection broadcast signal to the mobile phone, S5, receiving the broadcast signal by the mobile phone and judging whether the broadcast signal is screen projection broadcast, if so, carrying out the next step, S6, judging whether the distance between the remote controller and the mobile phone is a preset distance according to the broadcast signal, if so, carrying out the next step, and S7, sending a screen projection instruction to the digital television by the mobile phone; according to the mobile phone screen projection method, only the mobile phone needs to knock the designated position of the remote controller, the mobile phone judges that the distance between the remote controller and the mobile phone is within the preset distance according to the broadcast signal, and then a screen projection instruction is sent to the digital television to complete screen projection, scanning is not needed to be conducted on NFC or two-dimensional codes of the remote controller, and screen projection efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of screen projection of mobile phones, in particular to a screen projection method and a screen projection method of a mobile phone.
Background
At present, mobile phones have already entered thousands of households, and the main function of the mobile phones is communication, so that the communication of people is facilitated. The existing smart phone also has the advantages of entertainment, navigation, shopping, money transfer and water and electricity fee payment, and is an almost inexhaustible tool for facilitating our lives. The smart phone is used as a platform now, and is a carrier of app software which is convenient for our life.
At present, many people use mobile phones to watch video and audio data such as short videos, and the whole watching effect is influenced because the size of the screen of the mobile phone is limited; therefore, the screen projection technology comes to the end, and the video content on the mobile phone is projected to the television screen for playing, so that a good film viewing effect is achieved. Present cell-phone throw screen technique all adopts NFC or two-dimensional code technique usually, opens cell-phone NFC, reads NFC on the remote controller or scans on the TV set interface two-dimensional code and accomplish through the cell-phone and throw the screen, but, when NFC or two-dimensional code on the cell-phone scanning remote controller, must adjust to suitable position and just can accomplish to sweep the code, otherwise will unable completion connection, throw the efficiency of screen not high, old man and child operate moreover and get up and give the difficulty.
Disclosure of Invention
Therefore, a mobile phone screen projection method which is simple and has high screen projection efficiency is needed.
A screen projection method for a mobile phone comprises
S1, arranging the digital television and the mobile phone in the same area network;
s2, connecting the remote controller with the digital television in a Bluetooth pairing manner;
s3, knocking the designated position of the remote controller by the mobile phone;
s4, the remote controller recognizes the knocking action through the SENSOR and triggers the non-directional impossible connection broadcast signal to the mobile phone;
s5, the mobile phone acquires the knocking action and the broadcast signal;
s6, the mobile phone receives the broadcast signal and judges whether the broadcast signal is a screen projection broadcast, if so, the next step is carried out;
s7, judging whether the distance between the remote controller and the mobile phone is a preset distance or not according to the broadcast signal, if so, carrying out the next step;
s8, the mobile phone sends a screen projection instruction to the digital television;
and S9, completing screen projection by the digital television.
In one embodiment, the method for determining the distance between the remote controller and the mobile phone includes:
s21, obtaining the strength value RSSI of the Bluetooth signal;
s22, acquiring the signal intensity A when the remote controller and the mobile phone are separated by one meter;
s23, an environment attenuation factor n;
and S24, calculating the distance between the remote controller and the mobile phone according to the formula d = 10^ ((abs (RSSI) -A)/(10 x n)).
In one embodiment, the broadcast signal includes a MAC address, a transmit power.
In one embodiment, in S6, when the distance between the remote controller and the mobile phone exceeds the preset distance, the operation returns to S3.
In one embodiment, in S5, when the broadcast signal received by the mobile phone is a non-screen-casting broadcast, the mobile phone stops screen casting.
According to the mobile phone screen projection method, only the mobile phone is needed to knock any position of the remote controller, the remote controller recognizes knocking actions through the SENSOR and triggers an omnidirectional impossible-connection broadcast signal to the mobile phone and the television, the mobile phone judges that the distance between the remote controller and the mobile phone is within a preset distance according to the broadcast signal, and then sends a screen projection instruction to the digital television to complete screen projection, scanning does not need to be conducted on NFC or two-dimensional codes of the remote controller, and therefore screen projection efficiency is greatly improved.
Detailed Description
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A screen projection method for a mobile phone comprises
S1, arranging the digital television and the mobile phone in the same area network;
s2, connecting the remote controller with the digital television in a Bluetooth pairing manner;
s3, knocking the designated position of the remote controller by the mobile phone;
s4, the remote controller recognizes the knocking action through the SENSOR and triggers the non-directional impossible connection broadcast signal to the mobile phone;
s5, the mobile phone acquires the knocking action and the broadcast signal;
s6, the mobile phone receives the broadcast signal and judges whether the broadcast signal is a screen projection broadcast, if so, the next step is carried out;
s7, judging whether the distance between the remote controller and the mobile phone is a preset distance or not according to the broadcast signal, if so, carrying out the next step;
s8, the mobile phone sends a screen projection instruction to the digital television;
and S9, completing screen projection by the digital television.
SENSOR is a SENSOR, e.g. gyroscope, gravity SENSOR
For example,
s1, arranging the digital television and the mobile phone in the same area network;
s2, connecting the remote controller with the digital television in a Bluetooth pairing manner;
s3, knocking the designated position of the remote controller by the mobile phone;
s4, the remote controller recognizes the knocking action through the SENSOR and triggers the non-directional impossible connection broadcast signal to the mobile phone;
s5, the mobile phone acquires the knocking action and the broadcast signal;
s6, the mobile phone receives the broadcast signal and judges whether the broadcast signal is a screen projection broadcast, if so, the next step is carried out; otherwise, stopping screen projection;
s7, judging whether the distance between the remote controller and the mobile phone is a preset distance or not according to the broadcast signal, if so, carrying out the next step, otherwise, returning to S3;
s8, the mobile phone sends a screen projection instruction to the digital television;
and S9, completing screen projection by the digital television. Therefore, the mobile phone screen projection method only needs to knock the designated position of the remote controller by the mobile phone, the remote controller recognizes knocking action through the SENSOR and triggers an omnidirectional impossible-to-connect broadcast signal to the mobile phone, the mobile phone judges that the distance between the remote controller and the mobile phone is within the preset distance according to the broadcast signal, and then sends a screen projection instruction to the digital television to complete screen projection, and NFC or two-dimensional codes of the remote controller do not need to be aligned for scanning, so that the screen projection efficiency is greatly improved.
Further, in order to avoid misoperation, the next step is started after the mobile phone and the remote controller acquire the knocking signal at the same time, whether screen projection broadcasting is performed is judged firstly, then whether the distance between the remote controller and the mobile phone is a preset distance is judged, screen projection is further performed, and if any one of the mobile phone and the remote controller does not receive the knocking signal, the next step is not performed. The generation of screen misprojection is avoided.
Further, when the mobile phone judges that the distance between the remote controller and the mobile phone is not the preset distance, an alarm signal is sent out to make a user know that screen projection cannot be finished. Reminding the user to continue to knock the preset position of the remote controller through the mobile phone to project the screen.
In one embodiment, the method for determining the distance between the remote controller and the mobile phone includes:
s21, obtaining the strength value RSSI of the Bluetooth signal;
s22, acquiring the signal intensity A when the remote controller and the mobile phone are separated by one meter;
s23, an environment attenuation factor n;
and S24, calculating the distance between the remote controller and the mobile phone according to the formula d = 10^ ((abs (RSSI) -A)/(10 x n)).
Rssi (received Signal Strength indicator) is an indication of the Strength of the received Signal, which is implemented after the backchannel baseband receive filter.
The unit of RSSI is dbm, and in bluetooth, we can directly understand that the strength of a received bluetooth signal, RSSI = 10 × log P, P represents the received signal power, bluetooth transmits a broadcast signal, the distance difference affects the received signal power, and assuming that the transmission power takes a maximum value of 1mw, the RSSI value is 0, that is, the RSSI value obtained in an ideal state when your distance is closest to bluetooth is 0, but in practice, this ideal state basically does not exist, so the RSSI value is basically a negative number, while in bluetooth, when the distance is very close, the received RSSI signal value is about-50 dbm.
After obtaining the RSSI value, since the RSSI value is 0 when all the transmitted power is received in an ideal state, we can consider that the strength of the received-20 dbm signal value is greater than that of the received-50 dbm signal value under the same environment.
According to the calculation formula:
d = 10^ ((abs (RSSI) -A)/(10 × n)) the distance between the mobile phone and the remote controller can be obtained.
Wherein:
d-calculated distance
RSSI-received signal strength (negative value)
Signal strength at 1 meter separation of A-transmitting and receiving ends
n-environment attenuation factor
The A value and the n value can be obtained only by field testing continuously, the environmental attenuation factors of different fields are different, and even the environmental attenuation factors are influenced to a great extent by the obstruction of objects in the same field. However, in the same place, the default values of the A parameter and the N parameter are used, so that the relative distance between the remote controller and the mobile phone can be judged.
Further, in order to obtain a relatively accurate a value, different a values are obtained at different time periods of the same test site for testing, for example, respectively denoted as a1 and a2, and weighted average values of a1 and a2 are calculated.
Further, in order to obtain a relatively accurate n value, different n values are obtained at different positions of the same field and are respectively recorded as: n1, n2..
Therefore, different n value weighted average values are obtained at different positions of the same field, so that more accurate n values can be obtained, and the obtained d values are more accurate.
Further, in order to obtain a relatively accurate n value, different n values are obtained at different positions of different fields and are respectively recorded as: n1, n2.. So as to obtain the average value of the environmental attenuation factors of different sites.
In one embodiment, the broadcast signal includes a MAC address, a transmit power, a key, a broadcast type descriptor.
In one embodiment, in S6, when the distance between the remote controller and the mobile phone exceeds the preset distance, the operation returns to S3.
In one embodiment, in S5, when the broadcast signal received by the mobile phone is a non-screen-casting broadcast, the mobile phone stops screen casting.
In order to make the value of the distance d between the remote controller and the mobile phone more accurate, an environmental interference attenuation value needs to be calculated, and the specific method is as follows;
the television sends a fixed power instruction to the remote controller;
after receiving the instruction, the remote controller returns the received actual power and the current transmitting power of the remote controller to the television together;
the television calculates a current environmental interference attenuation value according to the obtained data;
and calculating and checking the relative distance d between the remote controller and the mobile phone again.
When the environmental interference attenuation value is larger than the preset threshold value, the environmental interference attenuation is proved to be serious, the d value is larger than the actual value, the d value needs to be recalculated, misoperation is avoided, and normal screen projection is guaranteed. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
The invention discloses a screen projection method for a mobile phone, which comprises S1, arranging a digital television and the mobile phone in the same area network, S2, connecting a remote controller and a digital television Bluetooth in a matching way, S3, knocking the designated position of the remote controller by the mobile phone, S4, identifying knocking action by the remote controller through a SENSOR and triggering an omnidirectional impossible connection broadcast signal to the mobile phone, S5, receiving the broadcast signal by the mobile phone and judging whether the broadcast signal is screen projection broadcast, if so, carrying out the next step, S6, judging whether the distance between the remote controller and the mobile phone is a preset distance according to the broadcast signal, if so, carrying out the next step, and S7, sending a screen projection instruction to the digital television by the mobile phone; according to the mobile phone screen projection method, only the mobile phone needs to knock the designated position of the remote controller, the mobile phone judges that the distance between the remote controller and the mobile phone is within the preset distance according to the broadcast signal, and then a screen projection instruction is sent to the digital television to complete screen projection, scanning is not needed to be conducted on NFC or two-dimensional codes of the remote controller, and screen projection efficiency is greatly improved.
Claims (5)
1. A screen projection method for a mobile phone is characterized by comprising the following steps: comprises that
S1, arranging the digital television and the mobile phone in the same area network;
s2, connecting the remote controller with the digital television in a Bluetooth pairing manner;
s3, knocking the remote controller by the mobile phone;
s4, the remote controller recognizes the knocking action through the SENSOR and triggers the undirected unconnected broadcast signal to the mobile phone and the television;
s5, the mobile phone acquires the knocking action and the broadcast signal;
s6, the mobile phone receives the broadcast signal and judges whether the broadcast signal is a screen projection broadcast, if so, the next step is carried out;
s7, judging whether the distance between the remote controller and the mobile phone is a preset distance or not according to the broadcast signal, if so, carrying out the next step;
s8, the mobile phone sends a screen projection instruction to the digital television;
and S9, completing screen projection by the digital television.
2. The screen projection method of the mobile phone according to claim 1, wherein: the method for judging the distance between the remote controller and the mobile phone comprises the following steps:
s21, obtaining the strength value RSSI of the Bluetooth signal;
s22, acquiring the signal intensity A when the remote controller and the mobile phone are separated by one meter;
s23, an environment attenuation factor n;
and S24, calculating the distance between the remote controller and the mobile phone according to the formula d = 10^ ((abs (RSSI) -A)/(10 x n)).
3. The screen projection method of the mobile phone according to claim 1, wherein: the broadcast signal includes a MAC address, transmitter power, a key, a broadcast type descriptor.
4. The screen projection method of the mobile phone according to claim 1, wherein: in S6, the process returns to S3 when the distance between the remote controller and the mobile phone exceeds a preset distance.
5. The screen projection method of the mobile phone according to claim 1, wherein: and in the S5, when the mobile phone receives the broadcast signal and is not a screen-casting broadcast, stopping screen casting by the mobile phone.
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| CN202011523135.8A CN112637648B (en) | 2020-12-22 | 2020-12-22 | Mobile phone screen projection method |
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| CN202011523135.8A CN112637648B (en) | 2020-12-22 | 2020-12-22 | Mobile phone screen projection method |
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| CN112637648A true CN112637648A (en) | 2021-04-09 |
| CN112637648B CN112637648B (en) | 2022-12-13 |
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| CN112637648B (en) | 2022-12-13 |
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