Abstract: Disclosed are a method, device and system for sending a virtual card and a readable storage medium, which are configured to receive at least one audio-video stream data of a plurality of participant terminals in communication connection with a server side; determine target audio-video stream data corresponding to at least one speaker from the at least one audio-video stream data; obtain biological characteristic information for identifying the at least one speaker from the target audio-video stream data, the biological characteristic information includes face characteristic information and/or voiceprint characteristic information; generate a virtual card according to the biological characteristic information; overlay the virtual card to the target audio-video stream data, and synthesize the target audio-video stream data with other audio-video stream data in response to there being a plurality of audio-video stream data into a to-be-sent audio-video stream data; send the to-be-sent audio-video stream data to

Abstract: Disclosed are a method, device and system for sending a virtual card and a readable storage medium, which are configured to receive at least one audio-video stream data of a plurality of participant terminals in communication connection with a server side; determine target audio-video stream data corresponding to at least one speaker from the at least one audio-video stream data; obtain biological characteristic information for identifying the at least one speaker from the target audio-video stream data, the biological characteristic information includes face characteristic information and/or voiceprint characteristic information; generate a virtual card according to the biological characteristic information; overlay the virtual card to the target audio-video stream data, and synthesize the target audio-video stream data with other audio-video stream data in response to there being a plurality of audio-video stream data into a to-be-sent audio-video stream data; send the to-be-sent audio-video stream data to

Abstract: A video encoding apparatus includes a first processor and at least two encoders. The first processor is configured to divide a sequence of video frames into M first groups of pictures (GOPs) and send the M first GOPs to the at least two encoders, M being an integer greater than 1. The at least two encoders are configured to perform parallel encoding on the received M first GOPs to obtain M groups of video encoded data and send the M groups of video encoded data to the first processor. The first processor is further configured to merge the M groups of video encoded data into a video data stream.

Abstract: A video processing method is provided. The video processing method includes: obtaining a sequence of video frames; obtaining an allocation parameter of the sequence of video frames, and allocating the sequence of video frames to at least one video processor according to the allocation parameter; and processing the allocated sequence of video frames by using the at least one video processor.

Abstract: A positioning control method includes: determining a position of a positioning object; determining, based on the position of the positioning object, at least one target positioning beacon whose distance to the positioning object satisfies a predetermined condition; and sending a prompt message to the target positioning beacon, wherein the prompt message is intended to instruct a positioning beacon to switch a broadcast frequency from a first frequency to a second frequency which is greater than the first frequency.

Abstract: The present disclosure provides a positioning method of a target node in a wireless ad hoc network, including: performing an initial positioning to obtain a first positioning result for the target node; determining, based on the first positioning result and a second positioning result for an other node in the wireless ad hoc network, whether a positioning error exists in the first positioning result or not, wherein the second positioning result at least contains an accurate second positioning result; and calculating a third positioning result for the target node based on the accurate second positioning result, in response to determining a positioning error exists in the first positioning result. The present disclosure further provides a positioning apparatus of a target node in a wireless ad hoc network, an electronic device, and a storage medium.

Abstract: A video encoding apparatus includes a first processor and at least two encoders. The first processor is configured to divide a sequence of video frames into M first groups of pictures (GOPs) and send the M first GOPs to the at least two encoders, M being an integer greater than 1. The at least two encoders are configured to perform parallel encoding on the received M first GOPs to obtain M groups of video encoded data and send the M groups of video encoded data to the first processor. The first processor is further configured to merge the M groups of video encoded data into a video data stream.

Abstract: A positioning control method includes: determining a position of a positioning object; determining, based on the position of the positioning object, at least one target positioning beacon whose distance to the positioning object satisfies a predetermined condition; and sending a prompt message to the target positioning beacon, wherein the prompt message is intended to instruct a positioning beacon to switch a broadcast frequency from a first frequency to a second frequency which is greater than the first frequency.

Abstract: The present disclosure provides a positioning method of a target node in a wireless ad hoc network, including: performing an initial positioning to obtain a first positioning result for the target node; determining, based on the first positioning result and a second positioning result for an other node in the wireless ad hoc network, whether a positioning error exists in the first positioning result or not, wherein the second positioning result at least contains an accurate second positioning result; and calculating a third positioning result for the target node based on the accurate second positioning result, in response to determining a positioning error exists in the first positioning result. The present disclosure further provides a positioning apparatus of a target node in a wireless ad hoc network, an electronic device, and a storage medium.

Abstract: A communication system, gateway, terminal, and communication method based on LoRa technology are provided. The system includes: a gateway configured to transmit an LoRa data packet containing a preamble, wherein duration of the transmission of the preamble is n1; and a terminal configured to perform channel activity detection one time for a duration of q1 each time after sleeping for a duration of p1, continue to sleep for the duration of p1 in response to the preamble not being detected, or receive and process the data packet and then continue to sleep for the duration of p1 in response to the preamble being detected, wherein p1>q1, and p1+q1 is less than or equal to n1.

Abstract: A communication system, gateway, terminal, and communication method based on LoRa technology are provided. The system includes: a gateway configured to transmit an LoRa data packet containing a preamble, wherein duration of the transmission of the preamble is n1; and a terminal configured to perform channel activity detection one time for a duration of q1 each time after sleeping for a duration of p1, continue to sleep for the duration of p1 in response to the preamble not being detected, or receive and process the data packet and then continue to sleep for the duration of p1 in response to the preamble being detected, wherein p1>q1, and p1+q1 is less than or equal to n1.

Abstract: The present application proposes a queuing service method and device and a storage medium. The method includes: acquiring a first service number and a target service department of a target service object; acquiring information of each service personnel and a second service number of a service object who is being served in the target service department; determining a service waiting duration of the target service object according to the information of each service personnel, the first service number, and the second service number; and providing the service waiting duration to the target service object.