CN115550616A

CN115550616A - Wireless transmission system, method and device

Info

Publication number: CN115550616A
Application number: CN202110745455.6A
Authority: CN
Inventors: 刘念; 王婧; 黄茵
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-12-30
Also published as: WO2023273992A1

Abstract

The embodiment of the application provides a wireless transmission system, a method and a device, wherein the wireless transmission system comprises a sending device and a receiving device, wherein the receiving device is used for sending first information on a wireless transmission link, and the first information is used for indicating that the receiving device has access to a display device; the transmitting device is used for receiving first information on a wireless transmission link and transmitting a first free space optical FSO signal on an optical link according to the first information, wherein the first FSO signal carries video data to be played by display equipment; the receiving means is also for receiving the first FSO signal over the optical link. Therefore, in the wireless transmission system, the first information of the receiving device accessed to the display equipment can be transmitted through the wireless transmission link, the FSO signal carrying the video data is transmitted through the optical link, wireless and uncompressed high-speed transmission of the video data to be played on the display equipment can be realized, and then screen projection on demand with high-fidelity playing effect can be realized.

Description

Wireless transmission system, method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a wireless transmission system, method, and apparatus.

Background

The screen projection technology can project the video data of the terminal equipment to the display screens of other terminal equipment for displaying. The user can meet the requirements of small screen content and large screen watching by using a screen projection technology. For example, videos in a mobile phone can be released to a television for playing, so that a user can watch the released videos on the television, and better video watching experience is obtained.

With the continuous development of screen projection technology, the user demand for screen projection is more and more intense, and meanwhile, the requirement of the user for screen projection effect is higher and higher. For example, the requirement of high fidelity playing effect of the video, that is, when the video projected on other terminal devices is played, the playing effect on the original terminal device can be maintained as much as possible. Therefore, how to realize on-demand screen projection with high-fidelity playing effect becomes a problem to be solved urgently.

Disclosure of Invention

The embodiment of the application provides a wireless transmission system, a wireless transmission method and a wireless transmission device, which are beneficial to realizing on-demand screen projection with high-fidelity playing effect.

In a first aspect, the present application provides a wireless transmission system including a transmitting apparatus and a receiving apparatus. The receiving device is used for sending first information on the wireless transmission link, and the first information is used for indicating that the receiving device has access to the display equipment; the transmitting device is used for receiving first information on a wireless transmission link and transmitting a first Free Space Optical (FSO) signal on an Optical link according to the first information, wherein the first FSO signal carries video data to be played by display equipment; the receiving means is also for receiving the first FSO signal over the optical link.

Therefore, in the wireless transmission system, the first information of the display equipment accessed by the receiving device can be transmitted through the wireless transmission link to inform the sending device, and the FSO signal carrying the video data is transmitted to the receiving device through the optical link, so that the wireless, non-compression and high-speed transmission of the video data to be played on the display equipment is realized, and the on-demand screen projection with a high-fidelity playing effect is further facilitated.

That is to say, in the wireless transmission system, the wireless transmission link and the optical link are favorable for meeting the requirement of a user on screen projection, the transmission rate of the FSO signal can reach 10 to 100Gbps, the uncompressed video data transmission can be met, and the high-fidelity playing effect can be favorably realized.

In an alternative embodiment, the wireless transmission link is a low speed communication link. By adopting the low-speed communication link as the wireless transmission link, the transmission requirements of the first information and other contents in the embodiment of the application can be met, and meanwhile, the power consumption of the sending device and the receiving device is saved.

Alternatively, the low-speed communication link may be a link using bluetooth, wireless Fidelity (Wi-Fi), or other Wireless communication technologies.

In an alternative embodiment, the transmitting device is further configured to obtain an electrical signal carrying video data from the video source device and to convert the electrical signal into the first FSO signal before transmitting the first FSO signal.

In another optional embodiment, the wireless transmission system further comprises a video source device for inputting an electrical signal carrying video data to the transmitting device.

In an optional embodiment, the receiving apparatus is further configured to, after receiving the first FSO signal, convert the first FSO signal into an electrical signal carrying video data, and output the electrical signal to a display device for display.

In another optional embodiment, the wireless transmission system further comprises a display device for displaying the video data according to the electrical signal carrying the video data.

In an alternative embodiment, the sending device is further configured to send the first information to the video source device after receiving the first information. Since the first information is used for indicating that the receiving device has accessed the display device, the embodiment is beneficial to enabling the video source device to know that the receiving device has accessed the display device, and further can actively input the electric signal carrying the video data to the sending device.

Correspondingly, the video source device is also used for receiving the first information and inputting the electric signal carrying the video data to the sending device according to the first information. Thus, the wireless transmission system facilitates that the video source device can actively input the electrical signal carrying the video data to the transmitting device.

In an alternative embodiment, the transmitting means is further configured to transmit a second FSO signal to the receiving means before transmitting the first FSO signal; the receiving device is also used for detecting the optical power of the received second FSO signal and sending the optical power to the sending device through a wireless transmission link; the transmitting device is further configured to align an optical link between the transmitting device and the receiving device according to the optical power transmitted by the receiving device. This embodiment enables the transmitting device to transmit the first FSO signal over the aligned optical link so that the receiving device can more accurately receive the first FSO signal.

In an alternative embodiment, the transmitting device is configured to align an optical link between the transmitting device and the receiving device according to the optical power transmitted by the receiving device, and includes: and when the optical power meets the preset condition, the transmitting device determines that the optical link is aligned. Or, when the optical power does not meet the preset condition, the transmitting device determines that the optical link is not aligned, adjusts the holder carrying the transmitting device, and executes the step of transmitting the second FSO signal to the receiving device again. As can be seen, this embodiment may enable optical link alignment between the transmitting device and the receiving device.

In an alternative embodiment, the sending device is further configured to send second information to the receiving device over the wireless transmission link when the optical link between the sending device and the receiving device is aligned, the second information being used to indicate that the optical link is aligned. It can be seen that this embodiment can inform the receiving device that the optical link is aligned, thereby facilitating timely access of the receiving device to the display device.

In an optional embodiment, the first FSO signal and/or the second FSO signal are transmitted using a large beam spread angle, and a value of the large beam spread angle belongs to the first angle interval; the first FSO signal and/or the second FSO signal are received with a large field of view whose value belongs to the second angle interval. The embodiment is beneficial to expanding the receiving range of the receiving device and is more suitable for indoor scenes. Therefore, the transmission effect of the first FSO signal and/or the second FSO signal is improved.

Alternatively, the first angle interval and the second angle interval may be predefined or determined by negotiation between the transmitting apparatus and the receiving apparatus.

In a second aspect, embodiments of the present application provide a wireless transmission method, which can be described from the perspective of a transmitting device. The method comprises the following steps: the method comprises the steps that a sending device obtains an electric signal from a video source device, and the electric signal carries video data to be played by display equipment; the sending device converts the electric signal into a first FSO signal, and the first FSO signal carries video data; the transmitting device then transmits the first FSO signal over the optical link.

Therefore, in the wireless transmission method, the sending device transmits the first FSO signal carrying the video data through the optical link, so that wireless, uncompressed and high-speed transmission of the video data to be played on the display equipment is facilitated, and on-demand screen projection with a high-fidelity playing effect is facilitated.

That is to say, in the wireless transmission method, the optical link is favorable for realizing the requirement of a user on screen projection as required, the transmission rate of the FSO signal can reach 10 to 100Gbps, the uncompressed video data transmission can be met, and the high-fidelity playing effect is favorable for realizing.

In an alternative embodiment, the method further comprises: the transmitting apparatus receives first information on a wireless transmission link, the first information indicating that the receiving apparatus has accessed the display device. Accordingly, a transmitting apparatus transmits a first FSO signal over an optical link, comprising: the transmitting device transmits a first FSO signal to the receiving device over the optical link based on the first information. Therefore, the embodiment enables the sending device to know that the receiving device has accessed the display device, and then timely sends the first FSO signal carrying the video data to the receiving device.

In an alternative embodiment, the wireless transmission link is a low speed communication link. By adopting the low-speed communication link as the wireless transmission link, the transmission requirements of the contents such as the first information and the like in the embodiment of the application can be met, and meanwhile, the power consumption of the sending device is saved.

Alternatively, the low speed communication link may be a link using wireless communication technology such as bluetooth, wi-Fi, etc.

In an alternative embodiment, the method further comprises: the transmitting device transmits the first information to the video source device after receiving the first information. Since the first information is used to indicate that the receiving apparatus has been accessed to the display device, the embodiment is advantageous to enable the video source apparatus to know that the receiving apparatus has been accessed to the display device, and thus the video source apparatus can actively input the electrical signal carrying the video data to the transmitting apparatus.

In an optional embodiment, before the transmitting device transmits the first FSO signal on the optical link, the method further comprises: the transmitting device transmits a second FSO signal to the receiving device; then, the transmitting device receives the optical power transmitted by the receiving device on the wireless transmission link, wherein the optical power is the optical power of the second FSO signal detected by the receiving device; next, the transmitting device aligns an optical link between the transmitting device and the receiving device according to the optical power transmitted by the receiving device. This embodiment enables the transmitting device to transmit the first FSO signal over the aligned optical link, thereby facilitating more accurate reception of the first FSO signal by the receiving device.

In an optional embodiment, the aligning, by the sending apparatus, an optical link between the sending apparatus and the receiving apparatus according to the optical power sent by the receiving apparatus includes: and the transmitting device determines that the optical link is aligned when the optical power meets a preset condition. Or, when the optical power does not meet the preset condition, the transmitting device determines that the optical link is not aligned, adjusts the holder carrying the transmitting device, and executes the step of transmitting the second FSO signal to the receiving device again. As can be seen, this embodiment may enable optical link alignment between the transmitting device and the receiving device.

In an alternative embodiment, the method further comprises: the transmitting device transmits second information to the receiving device over the wireless transmission link when the optical link is aligned, the second information indicating that the optical link is aligned. As can be seen, this embodiment can inform the receiving device that the optical link is aligned, thereby facilitating timely access of the receiving device to the display device.

In an alternative embodiment, the first FSO signal and/or the second FSO signal are transmitted with a large beam spread angle, the value of which belongs to the first angular interval. The embodiment is beneficial to expanding the receiving range of the receiving device and is more suitable for indoor scenes. Thus, the transmission effect of the first FSO signal and/or the second FSO signal is improved.

Alternatively, the first angle interval may be predefined or determined by negotiation between the receiving apparatus and the transmitting apparatus.

In a third aspect, embodiments of the present application provide another wireless transmission method, which can be described from the perspective of a receiving device. The method comprises the following steps: the receiving device receives a first FSO signal from the sending device on an optical link, wherein the first FSO signal carries video data to be played by display equipment; the receiving device can convert the first FSO signal into an electric signal carrying video data; the receiving device then outputs the electrical signal to a display device for display.

Therefore, in the wireless transmission method, the receiving device receives the first FSO signal carrying the video data through the optical link, so that wireless, non-compression and high-speed transmission of the video data to be played on the display device is facilitated, and on-demand screen projection with a high-fidelity playing effect is facilitated.

That is to say, in the wireless transmission method, the optical link is favorable for realizing the requirement of a user on screen projection as required, the transmission rate of the FSO signal can reach 10-100 Gbps, the uncompressed video data transmission can be met, and the high-fidelity playing effect can be realized.

In an optional embodiment, before the receiving device receives the first FSO signal from the transmitting device over the optical link, the method further comprises: the receiving apparatus transmits first information on the wireless transmission link, the first information indicating that the receiving apparatus has accessed the display device. Therefore, the embodiment is beneficial to enabling the sending device to know that the receiving device has accessed the display device, so that the first FSO signal carrying the video data is sent to the receiving device in time, and then the receiving device can receive the first FSO signal in time.

In an alternative embodiment, the wireless transmission link is a low speed communication link. By adopting the low-speed communication link as the wireless transmission link, the transmission requirements of the contents such as the first information and the like in the embodiment of the application can be met, and meanwhile, the power consumption of the receiving device is saved.

Alternatively, the low-speed communication link may be a link using wireless communication technology such as Bluetooth, wi-Fi, etc.

In an optional embodiment, before the receiving device receives the first FSO signal from the transmitting device over the optical link, the method further comprises: the receiving device receives a second FSO signal from the transmitting device; the receiving device can detect the optical power of the second FSO signal; the receiving device then transmits optical power over the wireless transmission link to the transmitting device, the optical power being used by the transmitting device to align the optical link between the transmitting device and the receiving device. This embodiment advantageously allows the transmitting device to transmit the first FSO signal over the aligned optical link, thereby facilitating more accurate reception of the first FSO signal by the receiving device.

In an alternative embodiment, the method further comprises: the receiving device receives second information from the transmitting device over the wireless transmission link, the second information indicating that the optical link is aligned. Therefore, the embodiment is beneficial to the receiving device to know that the optical link is aligned, so that the display equipment can be accessed in time.

In an alternative embodiment, the first FSO signal and/or the second FSO signal are received with a large field angle, the value of which belongs to the second angular interval. The embodiment is beneficial to expanding the receiving range of the receiving device and is more suitable for indoor scenes. Thus, the transmission effect of the first FSO signal and/or the second FSO signal is improved.

Alternatively, the second angle interval may be predefined or determined by negotiation between the receiving device and the transmitting device.

In a fourth aspect, an embodiment of the present application provides a transmitting apparatus, where the transmitting apparatus includes a high-definition multimedia interface HDMI socket, an HDMI-to-free space optical FSO module, and a light emitting port; the HDMI-to-FSO module is respectively connected with the HDMI and the light emission port, and the HDMI female seat is also connected with an HDMI male head in the video source device.

The HDMI-to-FSO module is used for obtaining an HDMI signal from an HDMI male head in a video source device through an HDMI female seat, converting the HDMI signal into a first FSO signal and outputting the first FSO signal to a light emitting port; an optical transmit port is used to transmit the first FSO signal over an optical link. The HDMI signal and the first FSO signal carry video data to be played by the display device, respectively.

Therefore, the sending device transmits the first FSO signal carrying the video data through the optical link, wireless and non-compression high-speed transmission of the video data to be played on the display equipment is facilitated, and on-demand screen projection with a high-fidelity playing effect is facilitated.

Optionally, the sending apparatus may convert the HDMI signal into the FSO signal, and may also convert the DP signal or other video signals into the FSO signal, so that the sending apparatus may include a DP socket, a DP to FSO module, and an optical transmit port. Optionally, the sending device may convert the HDMI signal into the FSO signal, and may convert the USB signal into the FSO signal, so that the sending device may include a USB interface female socket, a USB to FSO module, and an optical transmitting port. Accordingly, the functions of the modules or devices in the sending apparatus can be referred to the related contents, and are not detailed here.

In an optional implementation manner, the sending apparatus further includes a wireless transmission module, where the wireless transmission module is connected to the HDMI socket; the wireless transmission module is used for receiving first information on a wireless transmission link and outputting the first information to the HDMI female socket, wherein the first information is used for indicating that a receiving device is connected to display equipment; the HDMI female socket outputs first information to a video source device through an HDMI male plug; the HDMI to FSO module is used for obtaining an HDMI signal from an HDMI male connector in a video source device through an HDMI female connector and associating the HDMI signal with first information.

In an alternative embodiment, the wireless transmission module may be a low-speed transmission module, and accordingly, the wireless transmission link may be a low-speed communication link. By adopting the low-speed communication link as the wireless transmission link, the transmission requirements of the contents such as the first information and the like in the embodiment of the application can be met, and meanwhile, the power consumption of the sending device is saved. Optionally, the wireless transmission module may be a wireless communication module such as bluetooth and Wi-Fi, and the low-speed communication link may be a link using a wireless communication technology such as bluetooth and Wi-Fi.

In an optional implementation manner, the HDMI-to-FSO module may include a photoelectric conversion unit and an FSO transmitting terminal, the photoelectric conversion unit being connected to the FSO transmitting terminal; the photoelectric conversion unit is used for converting the HDMI signal into a first FSO signal and coupling the first FSO signal to an FSO transmitting terminal, and the FSO transmitting terminal is used for processing the first FSO signal and outputting the processed first FSO signal to a light emitting port. The FSO transmitting end may process the first FSO signal by setting a value of a beam divergence angle of the first FSO signal to be a first angle interval.

In an optional embodiment, the wireless transmission module is further configured to trigger the FSO transmitting terminal to generate a second FSO signal, and the FSO transmitting terminal outputs the second FSO signal to the optical transmitting port, and the optical transmitting port transmits the second FSO signal on the optical link. The wireless transmission module is also used for receiving the optical power transmitted by the receiving device on the wireless transmission link, so that the transmitting device determines whether the optical link between the transmitting device and the receiving device is aligned according to the optical power. The optical power is the optical power of the second FSO signal detected by the receiving device.

In an optional implementation manner, the sending apparatus further includes a pan-tilt control module and a pan-tilt actuator, and the pan-tilt control module is connected to the wireless transmission module and the pan-tilt actuator respectively. The wireless transmission module is also used for outputting the light power to the holder control module; the holder control module is used for outputting second information to the wireless transmission module when the optical power meets a preset condition, and the second information is used for indicating that an optical link between the sending device and the receiving device is aligned; the holder control module is further used for outputting a holder control signal to the holder actuating mechanism when the optical power does not meet the preset condition, and the holder actuating mechanism controls the holder according to the holder control signal.

Furthermore, the holder actuating mechanism is also used for sending a triggering message to the wireless transmission module through the holder control module, the wireless transmission module responds to the triggering message, triggering the FSO transmitting end to generate a second FSO signal again and sending the second FSO signal through the optical transmitting port, so that the modules perform relevant operations again to align the optical link.

Therefore, the embodiment can automatically adjust the optical link between the sending device and the receiving device to align according to the optical power sent by the receiving device, and further inform the receiving device that the optical link is aligned through the second information, so that the receiving device can be accessed to the display device in time.

In a fifth aspect, an embodiment of the present application provides a receiving apparatus, where the receiving apparatus includes a light receiving port, a free space optical FSO to high definition multimedia interface HDMI module, and an HDMI header; the FSO-to-HDMI module is respectively connected with the light emitting port and the HDMI male head, and the HDMI male head is also connected with the HDMI female seat in the display device in a matched mode.

The optical receiving port is used for receiving a first FSO signal on an optical link and outputting the first FSO signal to the FSO-to-HDMI module; the FSO-to-HDMI module is used for converting the first FSO signal into an HDMI signal and outputting the HDMI signal to an HDMI male connector; the HDMI male connector outputs the HDMI signal to the display device through the HDMI female socket. The first FSO signal and the HDMI signal carry video data to be played by the display device, respectively.

Therefore, the receiving device receives the first FSO signal carrying the video data through the optical link, wireless and non-compression high-speed transmission of the video data to be played on the display equipment is facilitated, and on-demand screen projection with a high-fidelity playing effect is facilitated.

Optionally, the receiving device may convert the FSO signal into the HDMI signal, and may convert the FSO signal into the DP signal, so that the receiving device may include the optical transmitting port, the FSO-to-DP module, and the DP bus. Optionally, the receiving apparatus may not only convert the FSO signal into the HDMI signal, but also convert the FSO signal into the USB signal, and thus, the receiving apparatus may include the optical transmitting port, the FSO-to-USB module, and the USB interface male connector. Accordingly, the functions of the modules or devices in the receiving apparatus can be referred to the above related contents, and are not described in detail here.

In an optional implementation manner, the receiving apparatus further includes a wireless transmission module, and the wireless transmission module is connected with the HDMI male connector. The FSO-to-HDMI module is also used for accessing the display equipment through an HDMI male connector and determining first information, wherein the first information is used for indicating that the receiving device is accessed to the display equipment; the HDMI male connector is also used for outputting first information to the wireless transmission module; the wireless transmission module is used for sending first information on a wireless transmission link.

Alternative embodiments of the wireless transmission module and the wireless transmission link can be referred to the related explanation of the fourth aspect, and are not described in detail here.

In an optional implementation manner, the FSO-to-HDMI module may include an FSO receiving terminal and a photoelectric conversion unit, where the photoelectric conversion unit is connected to the FSO receiving terminal and the HDMI male connector respectively; the FSO receiving end is used for coupling the first FSO signal to the photoelectric conversion unit; the photoelectric conversion unit is used for converting the first FSO signal into an HDMI signal and outputting the HDMI signal to the HDMI male connector.

Optionally, the FSO receiving end is further configured to set a field angle used when receiving the first FSO signal to the second angle interval, so that the optical receiving port can receive the first FSO signal with the field angle.

In an optional embodiment, the optical receiving port is further configured to receive a second FSO signal and output the second FSO signal to the FSO receiving end. The FSO receiving terminal detects the optical power of the second FSO signal and sends the optical power to the wireless transmission module; the wireless transmission module is also configured to transmit the optical power over a wireless transmission link. The optical power described above is used by the transmitting device to align the optical link between the transmitting device and the receiving device. This embodiment is advantageous in that the transmitting device adjusts the optical link between the transmitting device and the receiving device according to the optical power, thereby facilitating a more accurate reception of the first FSO signal by the receiving device.

In an alternative embodiment, the wireless transmission module is further configured to receive second information over the wireless transmission link, the second information indicating that the optical link between the sending device and the receiving device is aligned, so as to facilitate timely access of the receiving device to the display apparatus. Therefore, in the embodiment of the application, the structure of the receiving device is asymmetric to that of the sending device, so that the structure of the receiving device is more miniaturized and is convenient to carry.

In a sixth aspect, an embodiment of the present application provides a wireless transmission apparatus, including:

the device comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring an electric signal from a video source device, and the electric signal carries video data to be played by the display device;

a conversion unit for converting the electrical signal into a first FSO signal, the first FSO signal carrying video data;

a transmitting unit, configured to transmit the first FSO signal on the optical link.

Optionally, the wireless transmission apparatus may be further configured to perform the method of the fourth aspect.

In a seventh aspect, an embodiment of the present application provides a wireless transmission apparatus, including:

a receiving unit, configured to receive a first FSO signal from a sending apparatus on an optical link, where the first FSO signal carries video data to be played by a display device;

a conversion unit for converting the first FSO signal into an electrical signal carrying video data;

and the output unit is used for outputting the electric signal to the display equipment for displaying.

Optionally, the wireless transmission apparatus may be further configured to perform the method of the fifth aspect.

In an eighth aspect, an embodiment of the present application provides a wireless transmission apparatus, including a transceiver, a memory, and a processor;

a transceiver for receiving or transmitting a signal; a memory for storing instructions or a computer program; a processor for executing a computer program or instructions stored by the memory to cause the wireless transmitting apparatus to perform the method of the fourth aspect or to perform the method of the fifth aspect.

In a ninth aspect, embodiments of the present application provide a computer-readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of the second aspect, or causes the computer to perform the method of the third aspect.

In a tenth aspect, embodiments of the present application provide a chip or a chip system, where the chip or the chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or instructions to perform the method according to the fourth aspect or the fifth aspect.

The interface in the chip may be an input/output interface, a pin, a circuit, or the like.

The system-on-chip in the above aspect may be a system-on-chip (SOC), a baseband chip, and the like, where the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, and the like.

In one possible implementation, the chip or chip system described above in this application further comprises at least one memory having instructions stored therein. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or may be a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

In an eleventh aspect, embodiments of the present application provide a computer program or a computer program product comprising computer instructions which, when run on a computer, cause the computer to perform the method of the fourth aspect, or cause the computer to perform the method of the fifth aspect.

Drawings

FIG. 1 is a schematic diagram of an HDMI cable;

FIG. 2 is a schematic flow chart of a Wi-Fi wireless screen projection;

fig. 3 is a schematic structural diagram of a wireless transmission system 100 according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a wireless transmission system 200 according to an embodiment of the present application;

fig. 5 is a schematic diagram of a wireless transmission method 100 according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a transmitting apparatus 301 according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a receiving apparatus 302 according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a wireless transmission method 200 according to an embodiment of the present application;

fig. 9 is a flowchart illustrating a wireless transmission method 300 according to an embodiment of the present application;

fig. 10 is a flowchart illustrating a wireless transmission method 400 according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a wireless transmission apparatus according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another wireless transmission apparatus provided in an embodiment of the present application;

fig. 13 is a schematic structural diagram of another wireless transmission apparatus according to an embodiment of the present application.

Detailed Description

The embodiments of the present application are described below with reference to the drawings.

With the continuous development of screen projection technology, the user demand of screen projection is more and more intense, and meanwhile, the requirement of the user on the screen projection effect is higher and higher. For example, the requirement of high fidelity playing effect of the video, that is, when the video projected on other terminal devices is played, the playing effect on the original terminal device can be maintained as much as possible.

In order to achieve a high-fidelity playing effect, one screen projection method is a wired screen projection method that transmits video data through a High Definition Multimedia Interface (HDMI) cable, a high definition digital display interface (DP) cable, or a Universal Serial Bus (USB) cable. Taking an example of implementing wired screen projection through an HDMI cable, please refer to fig. 1, where fig. 1 is a schematic structural diagram of an HDMI cable, where the HDMI cable includes an HDMI transmitting end (HDMI Source) and an HDMI receiving end (HDMI Sink). Wherein, the HDMI sender includes: HDMI Transmitter (HDMI Transmitter), consumer Electronics Control (CEC), HDMI-Ethernet and audio return function (HEAC), and query (detcet) module. The HDMI receiver includes: HDMI Receiver (HDMI Receiver), extended Display Identification Data (EDID) read-only memory (ROM), CEC, HEAC. Wherein, there are four wired passageways that are used for transmission signal between HDMI transmitter and the HDMI receiver, include: transition-modulated differential signaling (TMDS) Channel 0, TDMS Channel1, TDMS Channel 2, TDMS Clock (Clock) Channel.

In addition, a Display Data Channel (DDC) exists between the HDMI transmitter and the EDID ROM to obtain attribute information of a display device connected to the HDMI receiver. The CEC of the HDMI transmitter and the CEC of the HDMI receiver are connected through a CEC cable (CEC Line) to support a user to command and control the devices connected to the HDMI cable using a remote controller. The HEAC of the HDMI transmitter and the HEAC of the HDMI receiver are connected by a common cable (Utility Line), and in addition, an HEAC channel is added to the HDMI version 1.4 to realize sound return and can also be used for transmitting network signals. A Hot Plug Detect (HPD) cable exists between the query module of the HDMI transmitter and the HDMI receiver.

The HDMI receiving terminal can be connected with the display device. The HDMI transmitting end can monitor the state of the HPD cable, and when the HPD cable is at a Low (Low) level, the HDMI transmitting end shows that the HDMI receiving end is disconnected from the display device; when the HPD cable is at a High (High) level, it indicates that the HDMI sink is connected to the display device. The HDMI transmitting terminal can be connected with a video source device which caches video data. The HDMI transmitting end may acquire a Video (Video) signal and/or an Audio (Audio) signal from a Video source device and convert them into TMDS. The HDMI transmitting end transmits the TDMS to the HDMI receiving end through the TMDS Channel 0, the TMDS Channel1 and the TMDS Channel 2. Furthermore, the HDMI receiving end can convert the TMDS into video and/or audio signals, and output the video and/or audio signals to the display device for playing.

It can be seen that, in the screen projection mode, the transmission rate supported by the HDMI cable can reach 10.2Gbps to 18Gbps. Therefore, when the video and/or the audio are transmitted through the HDMI cable, the video and/or the audio do not need to be compressed and transmitted, and therefore wired screen projection with high-fidelity playing effect can be achieved. However, the screen projection method is implemented by using a wired cable such as an HDMI cable, which may cause inconvenience for users and may not satisfy the demand for screen projection at any time and any place.

In order to meet the demand of screen projection at any time and any place, another screen projection mode is to adopt a Wireless Fidelity (Wi-Fi) technology to realize Wireless screen projection. Referring to fig. 2, fig. 2 is a flow chart of a Wi-Fi wireless screen projection. In fig. 2, a wireless display transmitting end (Miracast Source) can compress an acquired image into a file in H264 format (a digital video compression format), and compress an acquired audio into a file in Advanced Audio Coding (AAC) format (a file compression format designed specifically for sound data). Then, the wireless display transmitting end mixes the above-mentioned file in the H264 format and the file in the AAC format into a Transport Stream (TS), and transmits the TS based on a Real Time Streaming Protocol (RTSP) to transmit to a wireless display receiving end (Miracast Sink). The wireless display receiving end receives the TS based on the RTSP, then carries out audio and video decoding on the TS to obtain pictures (images) and sounds (audios), and transmits the pictures (images) and the sounds (audios) to the display device for display.

Therefore, although the wireless screen projection mode can realize screen projection at any time and any place as needed, the wireless display transmitting end compresses the video and the audio and then transmits the compressed video and audio to the wireless display receiving end, so that the loss compression process may cause great loss to the quality of the video/audio, and the high-fidelity playing effect cannot be realized.

Therefore, how to realize on-demand screen projection with high-fidelity playing effect becomes a problem to be solved urgently.

The embodiment of the application provides a wireless transmission system, which can adopt a wireless transmission link to transmit a control signal between a transmitting device and a receiving device and adopts an optical link of free space light to transmit video data between the transmitting device and the receiving device, and is favorable for realizing on-demand screen projection with high-fidelity playing effect. The following detailed description is made with reference to the accompanying drawings.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a wireless transmission system 100 according to an embodiment of the present disclosure. The wireless transmission system 100 includes a transmitting apparatus 301 and a receiving apparatus 302. The transmitting device 301 and the receiving device 302 use a wireless transmission link to transmit control signals, and use an optical link of free-space light to transmit video data. The optical link is a Free Space Optical (FSO) optical link.

As shown in fig. 3, the receiving apparatus 302 is configured to send first information over the wireless transmission link, the first information being used to indicate that the receiving apparatus 302 has accessed the display device; the sending device 301 is configured to receive first information on a wireless transmission link, and send a first FSO signal on an optical link according to the first information, where the first FSO signal carries video data to be played by a display device; correspondingly, the receiving means 302 is also adapted to receive the first FSO signal over the optical link.

The FSO signal is a signal transmitted by using free space light as a carrier, wherein the light wave of the free space light can be generated by a laser diode. Compared with microwave frequency, the optical wave frequency of free space light is 3 to 5 orders of magnitude higher, so that the data code rate of free space light transmission can reach more than 10Gbps, even 100Gbps, and after subsequent upgrading and capacity expansion, the space for improving the data code rate of free space light transmission is large. Therefore, the wireless transmission system can meet the requirement of uncompressed video data transmission.

In addition, the FSO signal can be transmitted and received by a space optical antenna. Compared with the gain of a microwave antenna, the gain of the space optical antenna is improved by 60dBi to 90dBi, so that in the wireless transmission system, the sending device 301 can adopt lower sending power to send the FSO signal, namely high-speed communication can be realized, and the power consumption of the sending device 301 can be reduced.

In addition, the FSO signal is transmitted through an optical link, so that the wireless transmission of video data can be realized, and the requirement of screen projection according to the requirement can be met. The wireless transmission system 100 has the advantages of large bandwidth and wireless screen projection, can meet the user requirements of an emergency and anywhere connectable high-speed link, and is favorable for realizing screen projection with high-fidelity playing effect as required. Moreover, the wireless transmission system 100 also avoids the problem of poor screen projection effect caused by signal attenuation generated when an excessively long cable (such as an HDMI cable, a DP cable or a USB cable with a length exceeding about 5 meters) is used for signal transmission.

The wireless transmission system 100 may be used in a variety of projection scenarios. For example, the wireless transmission system 100 may be applied to a screen projection scene in a home, and videos in "small-screen" devices such as a mobile phone, a tablet, a portable game host, an Augmented Reality (AR), a Virtual Reality (VR), and a game host with a screen are projected onto a display screen of a "large-screen" device such as a television and a home projector for display, so that the home entertainment scene with various screens and multi-screen interaction is facilitated, and further the home entertainment experience of a user can be improved. For another example, the wireless transmission system 100 can be applied to a screen projection scene in a conference room, and can project and display video data in an office terminal or a portable terminal on a "large-screen" display device, thereby improving work efficiency. For another example, the wireless transmission system 100 may be applied to a screen projection scene in an entertainment venue and/or a mall, and a projection game, a projection video, and the like are implemented, so that a new entertainment experience may be provided for a user on the basis of cost-effective display.

In an alternative embodiment, the wireless transmission link may be a low speed communication link. By using the low-speed communication link as the wireless transmission link, the transmission requirements of the first information and other contents in the embodiment of the present application can be met, and at the same time, the power consumption of the sending device 301 and the receiving device 302 can be saved. Alternatively, the low-speed communication link may be a link using wireless communication technology such as bluetooth, wi-Fi (scheme of fig. 2), and the like.

In an alternative embodiment, the transmitting device 301 is further configured to obtain an electrical signal carrying video data from a video source device and convert the electrical signal into the first FSO signal before transmitting the first FSO signal.

In an alternative embodiment, the sending device 301 may be a video source device that buffers video data, such that the sending device 301 generates an electrical signal carrying the video data and converts the electrical signal into the first FSO signal.

In an alternative embodiment, the transmitting device 301 may transmit the first FSO signal on the optical link according to the first information, and may include: the transmitting device 301 determines a first FSO signal to be transmitted according to the first information, and then the transmitting device 301 transmits the first FSO signal on the optical link. It can be seen that this embodiment facilitates the transmitting means 301 to transmit the first FSO signal in a timely manner.

Optionally, the first information may include an attribute of the display device. For example, the attribute of the display device may include information of a model, a size, a resolution, and the like of the display device. This embodiment is advantageous in that, when the receiving apparatus 302 accesses a plurality of display devices, the transmitting apparatus 301 can select and transmit the FSO signal corresponding to the display device according to the content such as the attribute of the display device in the first information.

In an alternative embodiment, the receiving device 302 is further configured to convert the first FSO signal into an electrical signal carrying video data after receiving the first FSO signal, and output the electrical signal to a display device for display.

As can be seen, the wireless transmission system 100 can realize screen projection and high-fidelity playing effect at any time and any place according to the need by combining the video source device and the display device accessed by the receiving device 302.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a wireless transmission system 200 according to an embodiment of the present disclosure. The wireless transmission system 200 is different from the wireless transmission system 100 shown in fig. 3 in that the wireless transmission system 200 includes a video source device 303 and a display apparatus 304 in addition to a transmitting device 301 and a receiving device 302.

The sending device 301 can access the video source device 303 through a data high-speed transmission cable; the receiving apparatus 302 may access the display device 304 through a data high speed transmission cable. Alternatively, the type of the data high speed transmission cable between the transmission apparatus 301 and the video source apparatus 303 may be the same as the type of the data high speed transmission cable between the connection reception apparatus 302 and the display device 304. Alternatively, the data high-speed transmission cable may include an HDMI cable, a DP cable, or a USB cable, and accordingly, the electrical signal may be an HDMI signal, a DP signal, or a USB signal. Alternatively, the transmitting device 301 may access the video source device 303 through the HDMI female socket; the receiving apparatus 302 can access the display device 304 through the HDMI male connector.

The video source device 303 is used to buffer video data and provide an electrical signal carrying the video data to the sending device 301. Optionally, the sending device 301 may further send the received first information to the video source device 303, and the video source device 303 may receive the first information and determine the electrical signal carrying the video data according to the first information. Since the first information is used to indicate that the receiving apparatus 302 has accessed the display device 304, the video source apparatus 303 can know that the receiving apparatus 302 has accessed the display device 304, and can actively input an electrical signal carrying video data to the transmitting apparatus 301. Moreover, this embodiment is also beneficial to the fact that the electrical signal provided by the video source device 303 to the sending device 301 is an electrical signal associated with the first information, that is, the video data carried by the electrical signal is the video data to be played by the display device identified by the first information.

Optionally, the video source device 303 may further output the first information on the display interface, and the user determines the video data to be played by the display device 304 according to the first information, and then the video source device 303 sends the electrical signal carrying the video data to the sending device 301.

The display device 304 is used for acquiring an electrical signal carrying video data from the receiving apparatus 302 and playing the video data according to the electrical signal.

Alternatively, the transmitting device 301 may access the video source device 303 upon receiving the first information to acquire the electrical signal carrying the video data. The receiving apparatus 302 may send the first information to the sending apparatus 301 after accessing the display device 304.

Alternatively, if the transmitting device 301 does not access the video source device 303 when receiving the first information, the transmitting device 301 may further turn on and/or flash the notification lamp to notify the user that the transmitting device 301 is accessing the video source device 303.

Alternatively, the video source device 303 may be a smart phone (mobile phone), a smart watch, a tablet computer (Pad), a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart home (smart home), a wireless terminal in V2X car networking, and the like.

Alternatively, the display device 304 may be a television, a projector, a computer, a tablet (Pad), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart home (smart home), a wireless terminal in V2X car networking, and the like.

In the embodiment of the present application, in the wireless transmission system shown in fig. 3 and 4, since the optical link of the FSO is a narrow beam from one point to another point, it is also necessary to align the optical link between the transmitting apparatus 301 and the receiving apparatus 302 before the first FSO signal is transmitted on the optical link. The operation of the alignment phase between the transmitting device 301 and the receiving device 302 will be described below.

The transmitting means 301 is further configured to transmit a second FSO signal to the receiving means 302 before transmitting the first FSO signal; the receiving device 302 is further configured to detect the optical power of the received second FSO signal and transmit the optical power to the transmitting device 301 through the wireless transmission link; the transmitting means 301 is further configured to align the optical link between the transmitting means 301 and the receiving means 302 according to the optical power transmitted by the receiving means 302. The transmitting device 301 may thus transmit the first FSO signal over the aligned optical link, and the receiving device 302 may thus receive the first FSO signal more accurately.

In an alternative embodiment, the alignment of the optical link between the transmitting apparatus 301 and the receiving apparatus 302 by the transmitting apparatus 301 according to the optical power transmitted by the receiving apparatus 302 may include: when the optical power meets a preset condition, the transmitting device 301 determines that the optical link is aligned; alternatively, when the optical power does not satisfy the preset condition, the transmission device 301 determines that the optical link is misaligned, adjusts the pan/tilt head on which the transmission device 301 is mounted, and again executes the step of transmitting the second FSO signal to the reception device 302. For example, the transmitting device 301 transmits the second FSO signal to the receiving device 302 again after adjusting the pan/tilt head; the receiving device 302 detects the optical power of the second FSO signal and transmits the optical power; the transmitting device 301 again detects whether the optical power meets the preset condition, until the optical power meets the preset condition, and determines that the optical link is aligned.

Alternatively, the transmission device 301 adjusts the cradle head on which the transmission device 301 is mounted, and the adjustment can be achieved by adjusting the deflection angle of the cradle head.

As can be seen, in this embodiment, when the optical link is misaligned, the transmitting device 301 may align the optical link by adjusting the pan/tilt, and the receiving device 302 does not need to perform an adjusting operation. Then, the receiving apparatus 302 does not need to be provided with a member for performing an adjustment operation, such as a pan/tilt, and thus the structure of the receiving apparatus 302 can be miniaturized, so that the receiving apparatus 302 has the effects of being more convenient and lower in cost.

In an alternative embodiment, the preset condition may be that the optical power belongs to a first power range. Thus, the transmitting apparatus 301 determines that the optical link is aligned when the optical power falls within the first power range; the transmitting device 301 determines that the optical link is misaligned when the optical power does not fall within the first power range. The first power range may be predefined or negotiated between the transmitting device 301 and the receiving device 302.

In another alternative embodiment, the preset condition may be that the optical power is greater than or equal to the first power threshold. Thus, the transmitting device 301 determines that the optical link is aligned when the optical power is greater than or equal to the first power threshold; the transmitting device 301 determines that the optical link is misaligned when the optical power is less than the first power threshold. The first power threshold may be predefined or negotiated between the transmitting device 301 and the receiving device 302.

In an alternative embodiment, the sending device 301 is further configured to send second information to the receiving device 302 over the wireless transmission link when the optical link between the sending device 301 and the receiving device 302 is aligned, the second information being used for indicating that the optical link is aligned. Correspondingly, the receiving apparatus 302 is further configured to receive the second information from the sending apparatus 301 over the wireless transmission link. So that the receiving device 302 can know that the optical link is aligned, thereby facilitating timely access of the receiving device 302 to the display apparatus.

In another alternative embodiment, the transmitting device 301 is further configured to turn on and/or flash an indicator light in the transmitting device 301 when the optical link between the transmitting device 301 and the receiving device 302 is aligned, so as to inform the user that the optical link is aligned. As can be seen, this embodiment facilitates the user to access the receiving apparatus 302 to the display device in a timely manner.

The above-mentioned operations performed by the transmitting device 301 to align the optical link may be performed before or after the transmitting device accesses the video source device.

It can be seen that the above-mentioned related implementation of aligning the optical link is beneficial to enable the first FSO signal carrying the video data to be transmitted through the aligned optical link, so that the receiving device 302 can receive the first FSO signal more accurately.

In the wireless transmission systems shown in fig. 3 and fig. 4, the operations related to the transmitting apparatus 301 and the receiving apparatus 302 can be divided into an alignment phase, a link establishment phase and a transmission phase, which will be described below with reference to the schematic diagram of the wireless transmission method 100 shown in fig. 5.

Wherein the alignment stage comprises: the transmitting device 301 transmits the second FSO signal to the receiving device 302; the receiving device 302 detects the optical power of the received second FSO signal and transmits the optical power over the wireless transmission link; when the transmitting device 301 determines that the optical link is misaligned based on the optical power, the cradle head on which the transmitting device 301 is mounted is adjusted, and the step of transmitting the second FSO signal to the receiving device 302 is executed again; when the transmitting device 301 determines that the optical link is aligned according to the optical power, second information indicating that the optical link is aligned is transmitted over the wireless transmission link.

The chain building stage comprises: the receiving device 302 accesses the display device after receiving the second information, and sends first information on the wireless transmission link, wherein the first information is used for indicating that the receiving device 302 has accessed the display device; the transmitting device 301 transmits the received first information to the video source device.

The transmission phase comprises the following steps: the transmitting device 301 acquires an electrical signal carrying video data from a video source device, converts the electrical signal into a first FSO signal, and then transmits the first FSO signal over an optical link. The receiving device 302 converts the received first FSO signal into an electrical signal and outputs the electrical signal to a display device for displaying.

In addition, based on the wireless transmission system shown in fig. 4, the link establishment phase shown in fig. 5 may further include: the video source device 303 receives the first information from the transmitting device 301; the transmission phase shown in fig. 5 may also include: the video source device 303 transmits an electric signal carrying video data to the transmission device 301 according to the first information; the display device 304 receives the electrical signal from the receiving apparatus 302 and plays video data according to the electrical signal.

In the alignment stage, the link establishment stage and the transmission stage between the sending device 301 and the receiving device 302, the control signal/management signal carrying the first information or the second information may be transmitted through the wireless transmission link, and the FSO signal carrying the video data may be transmitted through the aligned optical link, so as to achieve wireless, uncompressed and high-speed transmission of the video data to be played on the display device, and further facilitate to achieve on-demand screen projection with high-fidelity playing effect.

Next, a possible structure of the transmission apparatus 301 and the reception apparatus 302 will be described by taking an example in which the transmission apparatus is connected to the video source apparatus via an HDMI cable, and the reception apparatus is connected to the display device via an HDMI cable. Accordingly, the control signal or the management signal transmitted by the wireless transmission link may be an HDMI control signal or an HDMI management signal.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a transmitting apparatus 301 according to an embodiment of the present disclosure. The transmitter 301 may include an HDMI socket 3011, an HDMI-to-FSO module 3012, and an optical transmitter 3013; the HDMI-to-FSO module 3012 is connected to the HDMI socket 3011 and the light emitting port 3013, and the HDMI socket 3011 is further connected to an HDMI connector of a video source device.

The HDMI-to-FSO module 3012 is configured to obtain an HDMI signal from an HDMI male connector in a video source device through the HDMI female socket 3011, convert the HDMI signal into a first FSO signal, and output the first FSO signal to the light emitting port 3013; an optical transmit port 3013 is used to transmit the first FSO signal over an optical link. The HDMI signal and the first FSO signal carry video data to be played by the display device, respectively.

It can be seen that the sending apparatus 301 transmits the first FSO signal carrying the video data through the optical link, thereby facilitating the wireless, uncompressed and high-speed transmission of the video data to be played on the display device, and further facilitating the on-demand screen projection with high-fidelity playing effect.

In another alternative embodiment, the sending device 301 may not only convert the HDMI signal into the FSO signal, but also convert the DP signal into the FSO signal through the high definition digital display interface, so that the sending device 301 may include a DP socket, a DP to FSO module, and an optical transmitting port 3013. The DP-to-FSO module is respectively connected with a DP female socket and a light emitting port 3013, and the DP female socket is also connected with a DP male head in a video source device in a matching manner. The DP-to-FSO module is used for obtaining a DP signal from a DP male head in a video source device through a DP female seat, converting the DP signal into a first FSO signal and outputting the first FSO signal to a light emitting port; an optical transmit port 3013 is used to transmit the first FSO signal over an optical link. The DP signal and the first FSO signal carry video data to be played by the display device, respectively. Accordingly, the functions of the modules or devices in the sending apparatus 301 can be described with reference to the related contents described in fig. 6, and are not described in detail here.

In another alternative embodiment, the transmitter 301 may convert the HDMI signal to the FSO signal, and may also convert the USB signal to the FSO signal, so that the transmitter 301 may include a USB interface socket, a USB to FSO module, and an optical transmitter 3013. The USB-to-FSO module is respectively connected with the USB interface female socket and the light emission port, and the USB interface female socket is also matched and connected with a USB interface male connector in the video source device. The USB-to-FSO module is used for acquiring a USB signal from a USB interface male connector in the video source device through a USB interface female connector, converting the USB signal into a first FSO signal and outputting the first FSO signal to the light emitting port 3013; an optical transmit port 3013 is used to transmit the first FSO signal over an optical link. The USB signal and the first FSO signal carry video data to be played by the display device, respectively. Accordingly, the functions of the modules or devices in the sending apparatus 301 can be described with reference to the related contents described in fig. 6, and are not described in detail here.

The structure of the transmitter 301 will be further described below by taking the transmitter 301 to convert the HDMI signal to the FSO signal as an example.

The transmitting device 301 further includes a wireless transmission module 3014, where the wireless transmission module 3014 is connected to the HDMI socket 3011; the wireless transmission module 3014 is configured to receive first information over a wireless transmission link and output the first information to the HDMI socket 3011, where the first information is used to indicate that a receiving apparatus has accessed a display device; the HDMI female connector 3011 outputs first information to a video source device through an HDMI male connector of the video source device; the HDMI-to-FSO module 3012 associates the first information with an HDMI signal obtained from an HDMI header of a video source device through the HDMI socket 3011.

In an alternative embodiment, the wireless transmission module 3014 may be a low-speed transmission module, and correspondingly, the wireless transmission link may be a low-speed communication link. By adopting the low-speed communication link as the wireless transmission link, the transmission requirements of the first information and other contents in the embodiment of the application can be met, and meanwhile, the power consumption of the sending device is saved. Optionally, the wireless transmission module 3014 may be a wireless communication module such as bluetooth and Wi-Fi, and the low-speed communication link may be a link that uses a wireless communication technology such as bluetooth and Wi-Fi.

In an alternative embodiment, the HDMI-to-FSO module 3012 may include a photoelectric conversion unit 30121 and an FSO transmitting terminal 30122, where the photoelectric conversion unit 30121 is connected to the FSO transmitting terminal 30122; the optical-to-electrical conversion unit 30121 is configured to convert the HDMI signal into a first FSO signal, and couple the first FSO signal to the FSO transmitting terminal 30122, and the FSO transmitting terminal 30122 is configured to process the first FSO signal and output the processed first FSO signal to the light emitting port 3013. The FSO transmitting end 30122 may process the first FSO signal by setting a beam divergence angle of the first FSO signal to be a first angle interval.

Optionally, the FSO transmitting terminal 30122 may include a laser diode therein, which may generate the FSO signal. Alternatively, the light emission port 3013 may be a prism or the like.

In an alternative embodiment, the wireless transmission module 3014 is further configured to trigger the FSO transmitting terminal 30122 to generate a second FSO signal, and the FSO transmitting terminal 30122 outputs the second FSO signal to the optical transmitting port 3013, where the optical transmitting port 3013 transmits the second FSO signal on an optical link. The wireless transmission module 3014 is further configured to receive the optical power transmitted by the receiving apparatus over the wireless transmission link, so that the transmitting apparatus 301 determines whether the optical link between the transmitting apparatus 301 and the receiving apparatus is aligned according to the optical power. The optical power is the optical power of the second FSO signal detected by the receiving device.

In an optional implementation manner, the sending device 301 further includes a pan/tilt control module 3015 and a pan/tilt actuator 3016, where the pan/tilt control module 3015 is connected to the wireless transmission module 3014 and the pan/tilt actuator 3016, respectively. The wireless transmission module 3014 is further configured to output the optical power to the pan/tilt control module 3015; the pan/tilt/zoom control module 3015 is configured to output second information to the wireless transmission module 3014 when the optical power meets a preset condition, where the second information is used to indicate that an optical link between the sending apparatus 301 and the receiving apparatus is aligned; the cradle head control module 3015 is further configured to output a cradle head control signal to the cradle head actuator 3016 when the optical power does not satisfy a preset condition, and the cradle head actuator 3016 controls the cradle head according to the cradle head control signal.

Further, the pan/tilt actuator 3016 is further configured to send a trigger message to the wireless transmission module 3014 through the pan/tilt control module 3015, and the wireless transmission module 3014 triggers the FSO transmitter 30122 to generate the second FSO signal again in response to the trigger message, and sends the second FSO signal through the optical transmission port 3013, so that the above modules perform related operations again to align the optical link.

Therefore, in this embodiment, the optical link between the sending device 301 and the receiving device can be automatically adjusted to be aligned according to the optical power sent by the receiving device, and then the receiving device is informed of the alignment of the optical link through the second information, so that the receiving device can be accessed to the display device in time.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a receiving apparatus 302 according to an embodiment of the present disclosure. The receiving device 302 may include an optical receiving port 3021, an FSO-to-HDMI module 3022, and an HDMI header 3023; the FSO-to-HDMI module 3022 is connected to the light receiving port 3021 and the HDMI male connector 3023, respectively, and the HDMI male connector 3023 is also connected to the HDMI female socket in the display device in a matching manner.

The optical receiving port 3021 is configured to receive a first FSO signal on an optical link and output the first FSO signal to the FSO-to-HDMI module 3022; the FSO-to-HDMI module 3022 is configured to convert the first FSO signal into an HDMI signal and output the HDMI signal to the HDMI header 3023; the HDMI male connector 3023 outputs the HDMI signal to the display device through the HDMI female socket in the display device. The first FSO signal and the HDMI signal carry video data to be played by the display device, respectively.

It can be seen that the receiving apparatus 302 receives the first FSO signal carrying the video data through the optical link, thereby facilitating the implementation of wireless, uncompressed and high-speed transmission of the video data to be played on the display device, and further facilitating the implementation of on-demand screen projection with high fidelity playing effect.

In another alternative embodiment, the receiving device 302 may not only convert the FSO signal into the HDMI signal, but also convert the FSO signal into the DP signal, and thus, the receiving device 302 may include the optical receiving port 3021, the FSO-to-DP module, and the DP bus. The FSO-to-DP module is connected to the light receiving port 3021 and the DP male connector, and the DP male connector is further connected to the DP female connector of the display device in a matching manner. The optical receiving port 3021 is configured to receive a first FSO signal on an optical link and output the first FSO signal to the FSO-to-DP module; the FSO-to-DP module is used for converting the first FSO signal into a DP signal and outputting the DP signal to a DP male connector; the DP male head outputs the DP signal to the display equipment through a DP female seat in the display equipment. The first FSO signal and the DP signal carry video data to be played by the display device, respectively. Accordingly, the functions of the modules or devices in the receiving apparatus 302 can be described with reference to the related contents described in fig. 7, and are not described in detail here.

In yet another alternative embodiment, the receiving device 302 may not only convert the FSO signal into the HDMI signal, but also convert the FSO signal into the USB signal, so that the receiving device 302 may include the optical receiving port 3021, the FSO-USB module, and the USB interface male. The FSO-to-USB module is connected to the light receiving port 3021 and the USB interface male connector, and the USB interface male connector is further connected to the USB interface female socket of the display device in a mating manner. The optical receiving port 3021 is configured to receive a first FSO signal on the optical link and output the first FSO signal to the FSO-to-USB module; the FSO-to-USB module is used for converting the first FSO signal into a USB signal and outputting the USB signal to a USB interface male head; the USB interface male head outputs the USB signal to the display equipment through the USB interface female seat in the display equipment. The first FSO signal and the USB signal carry video data to be played by the display device, respectively. Accordingly, the functions of the modules or devices in the receiving apparatus can be described with reference to the related contents described in fig. 7, and are not described in detail here.

The structure of the receiving apparatus 302 will be further described below by taking the FSO signal to DP signal conversion of the receiving apparatus 302 as an example.

In an alternative embodiment, the receiving device 302 further includes a wireless transmission module 3024, and the wireless transmission module 3024 is connected to the HDMI male connector 3023. The FSO-to-HDMI module 3022 is further configured to access the display device through the HDMI header 3023, determine first information indicating that the receiving apparatus 302 has accessed the display device; the HDMI header 3023 is further configured to output the first information to the wireless transmission module 3024; the wireless transmission module 3024 is configured to transmit the first information over a wireless transmission link.

In an alternative embodiment, the wireless transmission module 3024 may be a low-speed transmission module, and accordingly, the wireless transmission link may be a low-speed communication link. By adopting the low-speed communication link as the wireless transmission link, the transmission requirements of the contents such as the first information and the like in the embodiment of the application can be met, and meanwhile, the power consumption of the sending device is saved. Optionally, the wireless transmission module 3024 may be a wireless communication module such as bluetooth or Wi-Fi, and the low-speed communication link may be a link using a wireless communication technology such as bluetooth or Wi-Fi.

In an alternative embodiment, the FSO-to-HDMI module 3022 may include an FSO receiving terminal 30221 and a photoelectric conversion unit 30222, where the photoelectric conversion unit 30222 is connected to the FSO receiving terminal 30221 and the HDMI header 3023 respectively; the FSO receiving terminal 30221 is configured to couple the first FSO signal to the photoelectric conversion unit 30222; the photoelectric conversion unit 30222 is configured to convert the first FSO signal into an HDMI signal, and output the HDMI signal to the HDMI header 3023. The FSO receiving terminal 30221 is also configured to set the angle of view adopted when receiving the first FSO signal to the second angle section, so that the optical receiving port 3021 can receive the first FSO signal with the angle of view.

Alternatively, the light receiving port 3021 may be a prism or the like.

In an alternative embodiment, the optical receiving port 3021 is further configured to receive a second FSO signal and output the second FSO signal to the FSO receiving terminal 30221. The FSO receiving terminal 30221 detects the optical power of the second FSO signal, and sends the optical power to the wireless transmission module 3024; the wireless transmission module 3024 is also used to transmit the optical power over a wireless transmission link. The optical power described above is used by the transmitting device to align the optical link between the transmitting device and the receiving device 302. This embodiment advantageously allows the transmitting device to transmit the first FSO signal over the aligned optical link, thereby facilitating more accurate reception of the first FSO signal by the receiving device 302.

In an alternative embodiment, the wireless transmission module 3024 is further configured to receive second information over the wireless transmission link, where the second information is used to indicate that the optical link between the sending apparatus and the receiving apparatus 302 is aligned, so as to facilitate the receiving apparatus 302 to access the display device in a timely manner.

It can be seen that the receiving apparatus 302 receives the first FSO signal carrying the video data through the optical link, thereby facilitating the wireless, uncompressed and high-speed transmission of the video data to be played on the display device, and further facilitating the on-demand screen projection with high-fidelity playing effect.

It should be understood that the illustrated structure of the embodiment of the present invention does not specifically limit the transmitting apparatus and/or the receiving apparatus. In other embodiments of the present application, the transmitting device and/or the receiving device may include more or fewer components than illustrated, or combine certain components, or split certain components, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Referring to fig. 8, fig. 8 is a schematic diagram of a wireless transmission method 200 according to an embodiment of the present disclosure. In the schematic diagram of the wireless transmission method 200, in combination with the schematic diagram of the transmitting apparatus shown in fig. 6 and the schematic diagram of the receiving apparatus shown in fig. 7, the first FSO signal and/or the second FSO signal transmitted between the FSO transmitting terminal 30122 and the FSO receiving terminal 30221 are transmitted by using a large beam divergence angle, so that the receiving range of the receiving apparatus 302 is expanded, and the method is more suitable for indoor scenes. Accordingly, the first FSO signal and/or the second FSO signal are received with a large field angle. Thus, the transmission effect of the first FSO signal and/or the second FSO signal is improved. For example, compared with the current method of transmitting the FSO signal by using a beam divergence angle of 500 micro radians (about 0.03 degrees), the embodiment of the present application can transmit the FSO signal by using a large beam divergence angle of several tens of degrees, which is more suitable for indoor scenes.

The value of the large beam divergence angle belongs to a first angle interval, and the value of the large field angle belongs to a second angle interval. Alternatively, the first angle interval and the second angle interval may be predefined or determined by negotiation between the transmitting apparatus 301 and the receiving apparatus 302. For example, the user may predefine the first angle interval as (0, 90 ° ] and the second angle interval as (0, 180 ° ], based on empirical values.

In addition, in combination with the schematic configuration of the transmitting apparatus shown in fig. 6 and the schematic configuration of the receiving apparatus shown in fig. 7, a wireless transmission link between the wireless transmission module 3013 and the wireless transmission module 3023 can be used to transmit the optical power of the HDMI control signal, the HDMI management signal, and the second FSO signal. The HDMI control signal and/or the HDMI management signal include a signal carrying first information or second information, the first information is used to indicate that the receiving apparatus 302 has accessed the display device 304, and the second information is used to indicate that the optical link is aligned.

Referring to fig. 9, fig. 9 is a flowchart illustrating a wireless transmission method 300 according to an embodiment of the present disclosure, where the wireless transmission method 300 can be applied to the wireless transmission system shown in fig. 3 or fig. 4, and is described from the perspective of interaction between a sending device and a receiving device. The wireless transmission method comprises the following steps:

s901, the sending device obtains an electric signal from a video source device, and the electric signal carries video data to be played by the display device.

S902, the transmitting device converts the electrical signal into a first FSO signal, which carries video data.

S903, the transmission device transmits the first FSO signal over the optical link. Accordingly, the receiving device receives the first FSO signal from the transmitting device over the optical link.

S904, the receiving device converts the first FSO signal into an electrical signal carrying video data.

And S905, outputting the electric signal to display equipment for displaying by the receiving device.

In an optional embodiment, before the receiving device receives the first FSO signal from the transmitting device over the optical link, the method further comprises: the receiving apparatus transmits first information on the wireless transmission link, the first information being used for indicating that the receiving apparatus has accessed the display device. Accordingly, the transmitting device receives the first information over the wireless transmission link. Optionally, the transmitting apparatus transmits the first FSO signal on the optical link, including: the transmitting device transmits a first FSO signal to the receiving device over the optical link based on the first information. The relevant description of this embodiment can be referred to the relevant description in fig. 3, and will not be described herein.

In an alternative embodiment, the wireless transmission link is a low speed communication link. Alternatively, the low-speed communication link may be a link using wireless communication technology such as Bluetooth, wi-Fi, etc. The description of this embodiment can be referred to in fig. 3, and will not be described herein.

In an alternative embodiment, the method further comprises: the transmitting device transmits the first information to the video source device after receiving the first information. The relevant description of this embodiment can be referred to the relevant description in fig. 4, and will not be described herein.

In an optional embodiment, before the transmitting device transmits the first FSO signal on the optical link, the method further comprises: the transmitting device transmits the second FSO signal to the receiving device. The receiving device receives the second FSO signal from the transmitting device and detects the optical power of the second FSO signal. The receiving device then transmits optical power over the wireless transmission link to the transmitting device, the optical power being used by the transmitting device to align the optical link between the transmitting device and the receiving device. Accordingly, the transmitting device receives the optical power from the receiving device over the wireless transmission link, and then aligns the optical link between the transmitting device and the receiving device according to the optical power transmitted by the receiving device. For a description of this embodiment, reference may be made to a description of an alignment stage between a sending device and a receiving device, and details are not repeated here.

In an optional embodiment, the aligning, by the sending apparatus, an optical link between the sending apparatus and the receiving apparatus according to the optical power sent by the receiving apparatus includes: and the transmitting device determines that the optical link is aligned when the optical power meets a preset condition. Or, when the optical power does not meet the preset condition, the transmitting device determines that the optical link is not aligned, adjusts the holder carrying the transmitting device, and executes the step of transmitting the second FSO signal to the receiving device again.

In an alternative embodiment, the method further comprises: the transmitting device transmits second information to the receiving device over the wireless transmission link when the optical link is aligned, the second information indicating that the optical link is aligned. Accordingly, the receiving device receives the second information from the transmitting device over the wireless transmission link.

Alternatively, the preset condition may be that the optical power belongs to a first power range. Accordingly, the transmitting device determines that the optical link is aligned when the optical power falls within the first power range. Alternatively, the transmitting device determines the optical link misalignment when the optical power does not fall within the first power range. The first power range described above may be predefined or determined by the transmitting device and the receiving device 302 negotiation.

Alternatively, the preset condition may be that the optical power is greater than or equal to the first power threshold. Accordingly, the transmitting device determines that the optical link is aligned when the optical power is greater than or equal to the first power threshold. Alternatively, the transmitting device determines that the optical link is misaligned when the optical power is less than the first power threshold. The first power threshold may be predefined or negotiated by the transmitting device 301 and the receiving device 302.

In an alternative embodiment, the first FSO signal and/or the second FSO signal are transmitted using a large beam spread angle, the value of which belongs to the first angle interval. The embodiment is beneficial to expanding the receiving range of the receiving device and is more suitable for indoor scenes. Accordingly, the first FSO signal and/or the second FSO signal are received with a large field of view whose value belongs to the second angular interval. Thus, the transmission effect of the first FSO signal and/or the second FSO signal is improved.

Optionally, the first angle interval and the second angle interval may be predefined or determined by negotiation between the receiving apparatus and the transmitting apparatus. For example, the user may predefine the first angle interval as (0, 90 ° ] and the second angle interval as (0, 180 ° ]) based on empirical values.

In summary, in the wireless transmission method, the sending device obtains an electrical signal from the video source device, where the electrical signal carries video data to be played by the display device; converting the electric signal into a first FSO signal, wherein the first FSO signal carries video data; the first FSO signal is then transmitted over the optical link. Correspondingly, the receiving device receives the first FSO signal from the transmitting device on the optical link; then converting the first FSO signal into an electric signal carrying video data; and then outputs the electrical signal to a display device for display. Therefore, the FSO signal carrying the video data is transmitted through the optical link, and wireless transmission of the video data to be played on the display device is facilitated. And the transmission rate of the FSO signal can reach 10-100 Gbps, and the transmission of uncompressed video data can be met, so that uncompressed high-speed transmission of the video data can be realized, and the wireless transmission method is favorable for realizing on-demand screen projection with high-fidelity playing effect.

Referring to fig. 10, fig. 10 is a flowchart illustrating a wireless transmission method 400 according to an embodiment of the present disclosure, where the wireless transmission method 400 can be applied to the wireless transmission system shown in fig. 4, and is described from the perspective of interaction among a transmitting device, a receiving device, a video source device, and a display device. The wireless transmission method comprises the following steps:

s1001, the transmission device transmits the second FSO signal to the reception device. Accordingly, the receiving device receives the second FSO signal from the transmitting device. In this case, the video source device may be an already-connected transmission device or may not be yet connected to the transmission device.

S1002, the receiving device detects the optical power of the second FSO signal.

S1003, the receiving apparatus transmits the optical power over the wireless transmission link. Accordingly, the receiving device receives optical power from the receiving device over the wireless transmission link.

S1004, the transmitting device determines whether the optical power satisfies a preset condition. When the optical power does not satisfy the preset condition, performing step S1005; when the optical power satisfies the preset condition, steps S1006 to S1015 are performed.

S1005, the transmission device adjusts the pan/tilt head on which the transmission device is mounted, and step S1001 is executed again.

S1006, the transmitting device transmits second information to the receiving device over the wireless transmission link, the second information indicating that the optical link is aligned. Accordingly, the receiving apparatus receives the second information from the transmitting apparatus over the wireless transmission link.

S1007, the receiving apparatus accesses the display device, and determines first information, where the first information is used to indicate that the receiving apparatus has accessed the display device.

S1008, the receiving device sends the first information on the wireless transmission link. Accordingly, the transmitting device receives the first information from the receiving device over the wireless transmission link.

S1009, the transmission apparatus transmits the first information to the video source apparatus. Accordingly, the video source device receives the first information from the transmitting device.

And S1010, the video source device inputs the electric signal carrying the video data into the sending device. Accordingly, the transmitting device receives the electrical signal.

S1011, the transmitting device converts the electrical signal into a first FSO signal, which carries video data.

S1012, the transmitting apparatus transmits the first FSO signal on the optical link. Accordingly, the receiving device receives the first FSO signal from the transmitting device over the optical link.

S1013, the receiving device converts the first FSO signal into an electrical signal, which carries the video data.

And S1014, the receiving device outputs the electric signal carrying the video data to the display equipment. Accordingly, the display device receives the electrical signal.

And S1015, the display device displays the video data according to the electric signals.

The specific implementation of steps S1001 to S1015 can refer to the corresponding description in the wireless transmission method shown in fig. 9, and is not repeated herein.

Therefore, in the wireless transmission method, the FSO signal carrying the video data is transmitted to the receiving device through the optical link, so that the wireless transmission of the video data to be played on the display equipment is facilitated. And the transmission rate of the FSO signal can reach 10-100 Gbps, and the transmission of uncompressed video data can be met, so that uncompressed high-speed transmission of the video data can be realized, and the wireless transmission method is favorable for realizing on-demand screen projection with high-fidelity playing effect.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a wireless transmission device according to an embodiment of the present disclosure. The wireless transmission apparatus 1100 includes: acquisition unit 1101, conversion unit 1102, and transmission unit 1103.

An acquisition unit 1101 configured to acquire an electrical signal from a video source device, where the electrical signal carries video data to be played by a display device;

a conversion unit 1102 for converting the electrical signal into a first free-space optical FSO signal, the first FSO signal carrying video data;

the sending unit 1103 is further configured to send the first FSO signal over the optical link.

In an optional implementation manner, the wireless transmission apparatus further includes: a receiving unit 1104; a receiving unit 1104, configured to receive first information over a wireless transmission link, where the first information is used to indicate that a receiving apparatus has accessed a display device;

the sending unit 1103 is configured to, when sending the first FSO signal on the optical link, specifically execute: the transmitting device transmits a first FSO signal to the receiving device over the optical link based on the first information.

In an alternative embodiment, the wireless transmission link is a low speed communication link. Alternatively, the low-speed communication link may be a link using wireless communication technology such as Bluetooth, wi-Fi, etc.

In an alternative embodiment, the sending unit 1103 is further configured to send the first information to the video source device after receiving the first information.

In an alternative embodiment, the sending unit 1103 is further configured to send a second FSO signal to the receiving apparatus before sending the first FSO signal on the optical link;

a receiving unit 1104, further configured to receive optical power transmitted by the receiving apparatus over a wireless transmission link; the optical power is the optical power of the second FSO signal detected by the receiving means;

an alignment unit 1105 is configured to align an optical link between the transmitting apparatus and the receiving apparatus according to the optical power transmitted by the receiving apparatus.

In an optional implementation, the alignment unit 1105 is configured to align an optical link between a sending apparatus and a receiving apparatus according to an optical power sent by the receiving apparatus, and is specifically configured to perform:

when the optical power meets a preset condition, determining that the optical link is aligned; or when the optical power does not meet the preset condition, determining that the optical link is misaligned, adjusting a holder carrying the wireless transmission device, and executing the operation of sending the second FSO signal to the receiving device again.

In an alternative embodiment, the sending unit 1103 is further configured to send second information to the receiving apparatus over the wireless transmission link when the optical link is aligned; the second information is used to indicate that the optical link is aligned.

In an alternative embodiment, the first FSO signal and/or the second FSO signal are transmitted with a large beam spread angle, the value of which belongs to the first angular interval.

Optionally, the wireless transmission apparatus 1100 may be used to perform operations related to the method embodiments, and will not be described in detail here.

Referring to fig. 12, fig. 12 is a schematic structural diagram of another wireless transmission apparatus according to an embodiment of the present application. The wireless transmission apparatus 1200 includes: a receiving unit 1201, a converting unit 1202, and an output unit 1203.

A receiving unit 1201, configured to receive a first FSO signal from a sending apparatus on an optical link, where the first FSO signal carries video data to be played by a display device;

a conversion unit 1202 for converting the first FSO signal into an electrical signal carrying video data;

and an output unit 1203 for outputting the electrical signal to a display device for displaying.

In an optional embodiment, the wireless transmission apparatus further comprises a sending unit 1204; a sending unit 1204, configured to send first information over the wireless transmission link, where the first information is used to indicate that the receiving apparatus has accessed the display device.

In an optional embodiment, the receiving unit 1201 is further configured to receive a second FSO signal from the transmitting apparatus before receiving the first FSO signal from the transmitting apparatus on the optical link;

a detection unit 1205 for detecting the optical power of the second FSO signal;

a sending unit 1204, configured to send optical power to the sending apparatus over the wireless transmission link, where the optical power is used for the sending apparatus to align an optical link between the sending apparatus and the receiving apparatus.

In an alternative embodiment, the receiving unit 1201 is further configured to receive second information from the sending apparatus over the wireless transmission link, where the second information is used to indicate that the optical link is aligned.

In an alternative embodiment, the first FSO signal and/or the second FSO signal are received with a large field of view whose value belongs to the second angular interval.

Optionally, the wireless transmission apparatus 1200 described above may be configured to perform relevant operations in the above method embodiments, and details are not described here.

Referring to fig. 13, fig. 13 is a schematic structural diagram of another wireless transmission apparatus according to an embodiment of the present application. The wireless transmission apparatus 1300 may be a device (e.g., a chip) having a function of performing the wireless transmission method in the embodiment of fig. 9. The wireless transmitting device may include a transceiver 1301, at least one processor 1302, and a memory 1303. The transceiver 1301, the processor 1302, and the memory 1303 may be connected to each other via one or more communication buses, or may be connected in other ways.

The transceiver 1301 may be used to transmit data or receive data, among other things. It is to be appreciated that the transceiver 1301 is generic and may include a receiver and a transmitter.

The processor 1302 may be configured to process data of the wireless transmission apparatus 1300. The processor 1302 may include one or more processors, for example, the processor 1302 may be one or more Central Processing Units (CPUs), a Network Processor (NP), a hardware chip, or any combination thereof. In the case where the processor 1302 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

The memory 1303 stores program codes and the like. The memory 1303 may include volatile memory (RAM); the memory 1303 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory (flash memory), a hard disk (HDD) or a solid-state drive (SSD); the memory 1303 may also comprise a combination of memories of the above-mentioned kinds.

The processor 1302 and the memory 1303 may be coupled via an interface, or may be integrated together, which is not limited in this embodiment.

The transceiver 1301 and the processor 1302 may be configured to perform operations related to a transmitting apparatus in the wireless transmission method shown in fig. 9, where a specific implementation manner is as follows:

a transceiver 1301 configured to obtain an electrical signal from a video source apparatus, where the electrical signal carries video data to be played by a display device;

a processor 1302 for converting the electrical signal into a first FSO signal, the first FSO signal carrying video data;

transceiver 1301 is also configured to transmit the first FSO signal over the optical link.

In an alternative embodiment, the transceiver 1301 is further configured to receive first information over the wireless transmission link, where the first information is used to indicate that the receiving apparatus has accessed the display device;

when the transceiver 1301 transmits the first FSO signal on the optical link, it is specifically configured to: a first FSO signal is transmitted over the optical link to the receiving device based on the first information.

In an alternative embodiment, the transceiver 1301 is further configured to transmit the first information to the video source device after receiving the first information.

In an alternative embodiment, the transceiver 1301 is further configured to transmit a second FSO signal to the receiving apparatus before transmitting the first FSO signal over the optical link;

a transceiver 1301, further configured to receive optical power transmitted by a receiving apparatus over a wireless transmission link, where the optical power is optical power of the second FSO signal detected by the receiving apparatus;

the processor 1302 is further configured to align an optical link between the wireless transmission device and the receiving device according to the optical power transmitted by the receiving device.

In an alternative embodiment, the processor 1302, when aligning the optical link between the wireless transmission device and the receiving device according to the optical power transmitted by the receiving device, is specifically configured to:

when the optical power meets a preset condition, determining that the optical link is aligned; or when the optical power does not meet the preset condition, determining that the optical link is not aligned, adjusting the holder carrying the wireless transmission device, and executing the step of sending the second FSO signal to the receiving device again.

In an alternative embodiment, the transceiver 1301 is further configured to send second information to the receiving apparatus over the wireless transmission link when the optical link is aligned, where the second information is used to indicate that the optical link is aligned.

Optionally, the transceiver 1301 and the processor 1302 may be configured to perform relevant operations in the above method embodiments, and details are not described here.

In another alternative embodiment, the transceiver 1301 and the processor 1302 may be configured to perform operations related to a receiving apparatus in the wireless transmission method shown in fig. 9, where the specific implementation manner is as follows:

a transceiver 1301, configured to receive a first free space optical FSO signal from a sending apparatus on an optical link, where the first FSO signal carries video data to be played by a display device;

a processor 1302 for converting the first FSO signal into an electrical signal carrying video data;

the transceiver 1301 is further configured to output the electrical signal to a display device for displaying.

In an alternative embodiment, the transceiver 1301 is further configured to transmit first information on the wireless transmission link before receiving the first FSO signal from the transmitting apparatus on the optical link, where the first information is used to indicate that the receiving apparatus has accessed the display device.

In an alternative embodiment, the transceiver 1301 is further configured to receive a second FSO signal from the transmitting apparatus before receiving the first FSO signal from the transmitting apparatus over the optical link;

a processor 1302, further configured to detect an optical power of the second FSO signal;

the transceiver 1301 is further configured to transmit optical power to the transmitting apparatus over the wireless transmission link, the optical power being used by the transmitting apparatus to align the optical link between the transmitting apparatus and the receiving apparatus.

In an alternative embodiment, the transceiver 1301 is further configured to receive second information from the transmitting apparatus over the wireless transmission link, the second information indicating that the optical link is aligned.

In an alternative embodiment, the first FSO signal and/or the second FSO signal are received with a large field angle, the value of which belongs to the second angular interval.

Optionally, the transceiver 1301 and the processor 1302 may be configured to perform operations related to the method embodiments, and will not be described in detail here.

Embodiments of the present application provide a computer-readable storage medium storing a program or instructions, which when executed on a computer, cause the computer to execute a wireless transmission method in an embodiment of the present application.

The embodiment of the present application provides a chip or a chip system, where the chip or the chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected through a line, and the at least one processor is configured to run a computer program or instructions to execute the wireless transmission method in the embodiment of the present application.

The system-on-chip in the above aspect may be a system-on-chip (SOC), or a baseband chip, and the like, where the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, and the like.

In one implementation, the chip or chip system described above in this application further includes at least one memory having instructions stored therein. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or may be a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

The embodiments of the present application provide a computer program or a computer program product, which includes codes or instructions, when the codes or instructions are run on a computer, the computer executes the wireless transmission method in the embodiments of the present application.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on or transmitted over a computer-readable storage medium. The computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optics, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.

One of ordinary skill in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by hardware related to instructions of a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the above method embodiments. And the aforementioned storage medium includes: various media capable of storing program codes, such as ROM or RAM, magnetic or optical disks, etc.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wireless transmission system, characterized in that the wireless transmission system comprises a transmitting apparatus and a receiving apparatus;

the receiving device is used for sending first information on a wireless transmission link, and the first information is used for indicating that the receiving device has access to the display equipment;

the sending device is configured to receive the first information on the wireless transmission link, and send a first free space optical FSO signal on an optical link according to the first information, where the first FSO signal carries video data to be played by the display device;

the receiving means is further configured to receive the first FSO signal over the optical link.

2. The system of claim 1, wherein the wireless transmission link is a low speed communication link.

3. The system according to claim 1 or 2,

the transmitting device is further configured to acquire an electrical signal carrying the video data from a video source device before transmitting the first FSO signal, and convert the electrical signal into the first FSO signal.

4. The system according to any one of claims 1 to 3,

the receiving device is further configured to convert the first FSO signal into an electrical signal carrying the video data after receiving the first FSO signal, and output the electrical signal to the display device for display.

5. The system of claim 3 or 4,

the sending device is further configured to send the first information to the video source device after receiving the first information.

6. The system according to any one of claims 2 to 5,

the transmitting device is further used for transmitting a second FSO signal to the receiving device before transmitting the first FSO signal;

the receiving device is further configured to detect optical power of the received second FSO signal, and send the optical power to the sending device through the wireless transmission link;

the transmitting device is further configured to align an optical link between the transmitting device and the receiving device according to the optical power transmitted by the receiving device.

7. The system of claim 6,

the transmitting apparatus is further configured to transmit second information to the receiving apparatus over the wireless transmission link when the optical link between the transmitting apparatus and the receiving apparatus is aligned, where the second information is used to indicate that the optical link is aligned.

8. The system of any one of claims 1 to 6,

the first FSO signal and/or the second FSO signal are/is sent by adopting a large beam divergence angle, and the value of the large beam divergence angle belongs to a first angle interval;

the first FSO signal and/or the second FSO signal are received by adopting a large field angle, and the value of the large field angle belongs to a second angle interval.

9. A method of wireless transmission, the method comprising:

the method comprises the steps that a sending device obtains an electric signal from a video source device, wherein the electric signal carries video data to be played by display equipment;

the transmitting device converts the electrical signal into a first Free Space Optical (FSO) signal, wherein the first FSO signal carries the video data;

the transmitting device transmits the first FSO signal over an optical link.

10. The method of claim 9, further comprising:

the sending device receives first information on a wireless transmission link, wherein the first information is used for indicating that a receiving device is accessed to the display equipment;

the transmitting device transmits the first FSO signal over an optical link, comprising:

and the transmitting device transmits the first FSO signal to the receiving device on an optical link according to the first information.

11. The method of claim 10, wherein the wireless transmission link is a low speed communication link.

12. The method according to claim 10 or 11, characterized in that the method further comprises:

the transmitting device transmits the first information to the video source device after receiving the first information.

13. The method of any of claims 9 to 12, wherein the transmitting device further comprises, prior to transmitting the first FSO signal over an optical link:

the transmitting device transmits a second FSO signal to the receiving device;

the transmitting device receives the optical power transmitted by the receiving device on the wireless transmission link; the optical power is the optical power of the second FSO signal detected by the receiving device;

the transmitting device aligns an optical link between the transmitting device and the receiving device according to the optical power transmitted by the receiving device.

14. The method of claim 13, wherein the transmitting device aligning an optical link between the transmitting device and the receiving device according to the optical power transmitted by the receiving device comprises:

when the optical power meets a preset condition, the transmitting device determines that the optical link is aligned; alternatively, the first and second electrodes may be,

and when the optical power does not meet the preset condition, the transmitting device determines that the optical link is not aligned, adjusts the holder carrying the transmitting device, and executes the step of transmitting the second FSO signal to the receiving device again.

15. The method according to claim 13 or 14, further comprising:

the transmitting device transmits second information to the receiving device over the wireless transmission link when the optical link is aligned; the second information is used to indicate that the optical link is aligned.

16. The method according to any of claims 9 to 15, wherein the first FSO signal and/or the second FSO signal is transmitted with a large beamsplitting angle, the value of which belongs to a first angle interval.

17. A method of wireless transmission, the method comprising:

a receiving device receives a first free space optical FSO signal from a sending device on an optical link, wherein the first FSO signal carries video data to be played by display equipment;

the receiving device converts the first FSO signal into an electrical signal carrying the video data;

and the receiving device outputs the electric signal to the display equipment for displaying.

18. The method of claim 17, wherein prior to the receiving device receiving the first FSO signal from the transmitting device over the optical link, the method further comprises:

the receiving device sends first information on a wireless transmission link, wherein the first information is used for indicating that the receiving device has accessed the display equipment.

19. The method according to claim 18, wherein the wireless transmission link is a low speed communication link.

20. The method of any of claims 17 to 19, wherein prior to the receiving device receiving the first FSO signal from the transmitting device over the optical link, the method further comprises:

the receiving device receives a second FSO signal from the transmitting device;

the receiving device detects the optical power of the second FSO signal;

the receiving device transmits the optical power to the transmitting device over the wireless transmission link, the optical power being used by the transmitting device to align an optical link between the transmitting device and the receiving device.

21. The method of claim 20, further comprising:

the receiving device receives second information from the sending device over the wireless transmission link, the second information indicating that the optical link is aligned.

22. The method according to any of claims 17 to 21, wherein the first FSO signal and/or the second FSO signal are received with a large field of view, the value of which belongs to a second angular interval.

23. A wireless transmission apparatus comprising a memory and a processor;

the memory for storing instructions or computer programs;

the processor is configured to execute the computer program or instructions stored in the memory to cause the wireless transmission device to perform the method of any one of claims 9 to 16 or to perform the method of any one of claims 17 to 22.

24. A computer-readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 9 to 16 or causes the computer to perform the method of any one of claims 17 to 22.

25. A computer program product comprising computer instructions which, when run on a computer, cause the computer to perform the method of any one of claims 9 to 16 or cause the computer to perform the method of any one of claims 17 to 22.