Abstract: An audio/video interaction low-delay transmission method includes the following steps: a driving receiving end maintaining long connection communication with a sending end by means of a TCP, and the receiving end sending a video frame feature to the sending end; sending, by the sending end to the receiving end, a video frame satisfying the video frame feature, and accumulating the number of video frames obtained by the receiving end within a plurality of continuous preset time periods; determining whether the number of video frames obtained within a preset number of preset time periods within the plurality of continuous preset time periods satisfies a preset range, so that a video code rate is adjusted in time to ensure real-time performance and fluency.

Abstract: Disclosed is a lamp having a dynamic starry sky effect. The lamp includes a lamp frame, and a first light source, optical integrating lenses, a roller beam splitter, a starry sky laser assembly and a starry sky mirror disc, where the optical integrating lenses are configured to focus light emitted by the first light source into strip-shaped light spots and transmit the strip-shaped light spots formed through focusing to the roller beam splitter at a front part in a shining direction; the roller beam splitter is configured to form the light into nonlinear dynamic strip-shaped light spots during rotation; the starry sky laser assembly includes a second light source; the starry sky mirror disc is configured to reflect light generated by the second light source; and the light dots and the strip-shaped light spots are superposed and combined together to form the dynamic starry sky effect.

Abstract: A hot backup switching method and system based on network card detection. The method includes the following steps: S1: driving a first synchronous network card to send a query instruction to a second synchronous network card according to a preset time interval; S2: determining whether the first synchronous network card obtains a response packet sent by a master server device, if yes, executing S1; and if not and executing S3; S3: determining whether the working mode of the playback terminal belongs to a master mode; and if yes, and executing S4; and S4: determining whether the second synchronous network card responds, if yes, executing S1. Hot backup switching is implemented by means of the network cards of the master server device and the slave server device, and seamless switching and continued playback are realized.

Abstract: An intelligent port mapping method for a WSL2 system, including: installing a WSL2 subsystem and a BAT script, setting the WSL2 subsystem and the BAT script as automatic starting, and initializing a computer; a WSL2HOST service monitoring whether the IP of the WSL2 subsystem has changed, and if yes, writing a new IP address into a hosts file, used for domain name-IP address mapping relation management, in a Windows 10 system; the BAT script reading file data in the hosts file every m seconds, analyzing, according to the read file data, whether the IP address recorded by a host where the Windows 10 system is located has changed; and the BAT script mapping, according to the new IP address, all ports required by a WSL subsystem service to complete port mapping.

Abstract: A method for implementing the coding and decoding of a YUV444 image on the basis of H.265 includes acquiring a 1080p YUV444 image, and extracting a Y component, a U component and a V component from the 1080p YUV444 image; dividing a target image into 4 areas, wherein the 4 areas are denoted as a first area, a second area, a third area and a fourth area; and successively using the Y component, the U component and the V component of the 1080p YUV444 image as a Y component of the first area, a Y component of the second area and a Y component of the third area. With the method, the coding and decoding of an image can be implemented on the basis of H.265, and image definition can be improved.

Abstract: A method and seamless video switching method and system in video matrix. The method includes dividing a memory address on a memory for storing video data into several memory spaces; and reading and writing the video data normally under the condition that no video switching instruction is received; or executing steps as follows: enabling, during a period when the video switching instruction keeps valid, a write control module to skip back to a head address of a memory space currently written to write a frame of image in video data of a target channel after switching into the current memory space; and enabling a read control module to skip back to a head address of a memory space currently read to read a frame of image from the current memory space until the video switching instruction is invalid.

Abstract: An online electronic whiteboard content synchronization and sharing system includes an electronic whiteboard server and a plurality of clients, wherein an electronic whiteboard is installed in each client. The electronic whiteboard comprises a first layer, a second layer, a third layer and a fourth layer, which are sequentially stacked together, wherein the first layer is used to set a background color; the second layer is used to set a background picture; the third layer is used to draw received drawing data, which is transmitted from a network side; and the fourth layer is used to draw graphics on a local side. By means of the system, drawing data sent from network sides at the same time does not interfere with drawing data on a local side, such that a high real-time performance is achieved.

Abstract: Disclosed is a lamp having a dynamic starry sky effect. The lamp includes a lamp frame, and a first light source, optical integrating lenses, a roller beam splitter, a starry sky laser assembly and a starry sky mirror disc, where the optical integrating lenses are configured to focus light emitted by the first light source into strip-shaped light spots and transmit the strip-shaped light spots formed through focusing to the roller beam splitter at a front part in a shining direction; the roller beam splitter is configured to form the light into nonlinear dynamic strip-shaped light spots during rotation; the starry sky laser assembly includes a second light source; the starry sky mirror disc is configured to reflect light generated by the second light source; and the light dots and the strip-shaped light spots are superposed and combined together to form the dynamic starry sky effect.