10 results about "Multimedia data transmission" patented technology

This application relates to the field of Internet of Things (IoT) technology, and in particular to a method and system for personnel safety monitoring in chemical industrial parks based on dual-channel heterogeneous data transmission and multi-source fusion. The method synchronously collects environmental parameters and inertial data through mobile sensing terminals; constructs an extended Kalman filter model to tightly couple and fuse ultra-wideband positioning coordinates with inertial dead reckoning data to correct cumulative drift in predicted values; employs a vertical distance threshold trajectory compression algorithm at the edge to eliminate redundant positioning points on linear paths, reducing transmission load; dynamically adjusts the radius of the electronic fence based on gas concentration and determines fall events by combining acceleration amplitude temporal characteristics; and utilizes a dual-channel WiFi collaborative mechanism to normally upload lightweight data via a low-power channel, only activating the high-speed channel to upload on-site images when boundary crossings or fall anomalies are detected. This application effectively solves the technical problems of low positioning accuracy, multimedia data transmission bandwidth conflicts, and delayed safety warnings in industrial sites.

The invention discloses a multimedia data processing method for same-screen interaction of a cloud mobile phone. The multimedia data processing method comprises the following steps: the cloud mobile phone obtains multimedia data requests of all terminal equipment participating in same-screen interaction; allocating a first dynamic transmission parameter to the terminal device based on a hardware constraint condition of the terminal device; allocating a second dynamic transmission parameter to the terminal device based on a network constraint condition of the terminal device; fusing the multimedia data request, the first dynamic transmission parameter and the second dynamic transmission parameter to generate a data processing task corresponding to the terminal equipment; and the cloud mobile phone executes the data processing task and performs multimedia data interaction with the terminal equipment. Based on the invention, the cloud mobile phone can select the optimal multimedia data processing mode based on the multimedia data request of the terminal equipment and the hardware constraint condition and the network constraint condition of the terminal equipment, so that smooth multimedia data transmission service can be provided for the terminal equipment, and the user experience is ensured.

The application discloses a multimedia data transmission method and device based on multiplexing XDMA and a storage medium, relates to the technical field of data transmission, and discloses a multimedia data transmission method based on multiplexing XDMA, which comprises the following steps: encapsulating multiple paths of multimedia data into a combined transmission frame, each path of multimedia data is divided into multiple logical data segments containing data source identifiers and time sequence identifiers; transmitting the combined transmission frame to a host memory through a single XDMA channel, and establishing virtual channels corresponding to the multiple paths of multimedia data; analyzing the received combined transmission frame according to the data source identifiers and the time sequence identifiers, determining the distribution position of the logical data segment in the memory block through address calculation; based on the distribution position, the data source identifiers and the time sequence identifiers, the combined transmission frame is split and reorganized into each path of multimedia data; and each path of multimedia data is output to an application layer through the corresponding virtual channel, so that multiplexing of multiple paths of multimedia data based on a single channel is realized.

The embodiment of the invention discloses a multimedia data processing method and device, equipment and a readable storage medium. The method comprises the following steps: if multimedia data containing a plurality of multimedia frames is stored in a cache region, acquiring transmission loss information of multimedia data transmission with a receiving end; inputting the transmission loss information into a preset optimal rearrangement model, and calculating a target arrangement sequence for rearranging the arrangement sequence of the plurality of multimedia frames; on the basis of the target arrangement sequence, executing a disruption operation on the arrangement sequence among the plurality of multimedia frames to obtain a plurality of disrupted multimedia frames; and sending the plurality of disordered multimedia frames to a receiving end, so that the receiving end executes a restoration operation for the arrangement sequence on the plurality of disordered multimedia frames to obtain restored multimedia data. Through the method, the influence of transmission loss on the playing quality of the multimedia data can be reduced.

The application relates to the technical field of multimedia data transmission, and particularly relates to a multimedia data transmission method and system. The method determines a target space unit where a gaze point is located according to gaze point data of each client, and determines a plurality of peripheral space units covered by a view cone according to a view cone range parameter of the client; a highest enhancement precision level is allocated to the target space unit of each client, and a corresponding enhancement precision level is allocated according to the distance between the plurality of peripheral space units of each client and the gaze point; a predicted target space unit of the client is predicted according to the gaze point data change track of the client in a historical time period; a predicted attention client quantity distribution paying attention to the predicted target space unit is acquired, and model data corresponding to the enhancement precision level of the predicted target space unit is transmitted to the corresponding client according to the predicted attention client quantity distribution, so that the user experience in a virtual reality environment is effectively improved.

Embodiments of the present application provide a multimedia data transmission method and apparatus, a medium, and a device. The method comprises: calculating in real time a playable duration corresponding to multimedia data in a buffer; and if the playable duration does not exceed a target expected delay, reducing a first playback speed of the multimedia data in the buffer. According to the embodiments of the present application, a playable duration is compared with an expected delay, and whether to regulate a current playback speed is determined according to the comparison result, thereby avoiding picture freezing.

Embodiments of the disclosure provide method, apparatus, electronic device and storage medium for multimedia data transmission. The method includes: in response to a data transmission request, obtaining original multimedia data to be transmitted; in response to a preset special effect processing condition being met, determining a target special effect processing mode of the original multimedia data based on a preset special effect processing mode, wherein the preset special effect processing mode at least comprises a central processing unit mode and a graphics processor processing mode; and performing a special effect processing on the original multimedia data based on the target special effect processing mode to obtain target transmission multimedia data.

The invention discloses a cross-device multimedia data stream transmission method, a storage medium and a vehicle, and the method comprises the steps: obtaining a multimedia data stream collected in real time, and continuously monitoring the use condition of a main buffer region used for temporarily storing the multimedia data stream; dynamically evaluating whether the capacity of an effective buffer area for temporarily storing the multimedia data stream needs to be adjusted or not according to the use condition of the main buffer area; and if it is determined that the capacity of the effective buffer area needs to be adjusted, adjusting the capacity of the effective buffer area to store the multimedia data stream. By monitoring the use condition of the main buffer area in real time and dynamically adjusting the capacity of the buffer area for temporarily storing the multimedia data stream based on the monitoring result, a buffer mechanism capable of adaptively adjusting the buffer capacity according to the actual load is formed, the situation that the multimedia data is discarded due to insufficient capacity of the buffer area is avoided, and the service life of the multimedia data stream is prolonged. The continuity of multimedia data transmission and the fluency of the screen projection process are remarkably improved, and better screen projection experience is provided for users.

The embodiment of the invention discloses a multimedia data circulation method and device, electronic equipment and a program product. The method is applied to a first electronic device and a local area network connected with the first electronic device, and a plurality of second electronic devices are further included. The method comprises the following steps: collecting multimedia data; encoding the multimedia data through an encoding module according to the target encoding parameter to obtain a media stream; wherein the target coding parameter is determined according to transmission capabilities corresponding to a plurality of data transmission channels among a plurality of electronic devices under the local area network; and sending the media stream to each target second electronic device through a data transmission channel with one or more target second electronic devices. According to the multimedia data transfer method and device, the electronic equipment and the program product, the power consumption generated by the first electronic equipment can be reduced while a one-to-many multimedia data sharing function is realized, and the stability of multimedia data transmission is ensured.

Embodiments of the disclosure provide method, apparatus, electronic device and storage medium for multimedia data transmission. The method includes: in response to a data transmission request, obtaining original multimedia data to be transmitted; in response to a preset special effect processing condition being met, determining a target special effect processing mode of the original multimedia data based on a preset special effect processing mode, wherein the preset special effect processing mode at least comprises a central processing unit mode and a graphics processor processing mode; and performing a special effect processing on the original multimedia data based on the target special effect processing mode to obtain target transmission multimedia data.