6 results about "Multimedia transmission" patented technology

The invention provides a perception adaptive video stream code rate decision-making method and system based on a neural symbol reinforcement learning buffer area, and belongs to the technical field of computer network and multimedia transmission. According to the method, a neural symbol reinforcement learning agent is constructed, a comprehensive state vector is generated by collecting a playing state, video content information and user preference, and double decisions of code rate selection and buffer area adjustment are jointly output; security rules are formalized in a first-order logic mode, security exploration is achieved through a security monitor and a security layer strategy, and illegal risks such as underflow of a buffer area are avoided; the bandwidth prediction precision is improved by adopting HTTP / 3 stable connection sampling and a hybrid prediction model; and designing a multi-target reward function to balance user experience quality and buffer occupation optimization. According to the method, high-video-quality, low-lagging and low-delay transmission can be stably realized in a low-speed to 5G high-speed network, and unnecessary buffer accumulation can be remarkably reduced on the premise of ensuring smooth playing, so that end-to-end delay is reduced.

The invention discloses a method and device for achieving screen projection control based on a WIFI-Display protocol, and relates to the technical field of wireless communication and multimedia transmission, and the method comprises the steps: firstly, building a WIFI-Display connection session between a source device and a receiving end; secondly, a dynamic updating area of the screen is intelligently captured by monitoring a graphic buffer area and using a difference block detection algorithm, and an original screen data stream is only generated for a changing area so as to improve the efficiency; then, dynamically generating coding control parameters by analyzing image motion complexity and real-time network state parameters; and finally, carrying out real-time coding and adaptive network packaging on the data stream based on the parameter to form a screen projection data stream, and sending the screen projection data stream to a receiving end. Through the above mode, the method effectively reduces the bandwidth consumption and the coding calculation amount, and remarkably improves the transmission fluency and the image quality stability of the dynamic screen content in a complex network environment through the adaptive code rate and the packaging strategy.

The embodiment of the invention discloses a multimedia transmission method and device, equipment, a medium and a product. The multimedia transmission method comprises the following steps: receiving a first request message which is sent by a client and comprises a multimedia recommendation list and a currently requested target multimedia resource; detecting whether the server locally caches target multimedia resources and recommended multimedia resources in a multimedia recommendation list or not according to the first request message; obtaining a target multimedia resource and a recommended multimedia resource according to the obtained detection result, and sending the target multimedia resource to the client, so that the client performs local cache playing on the target multimedia resource; and in response to a second request message which is sent by the client and is used for requesting the multimedia resources, sending the acquired recommended multimedia resources to the client, so that the client performs local cache playing. According to the technical scheme provided by the embodiment of the invention, the first screen loading time is effectively shortened, the waiting time and the lagging phenomenon during multimedia playing are reduced, and the overall viewing experience of the object is improved.

Disclosed are a slave node device in a multimedia transmission system and the multimedia transmission system. The slave node device comprises: a receiving module configured to receive a data frame from an upstream node; a sending module configured to send the data frame to a downstream node; an analyzing module configured to analyze the received data frame and store the analyzed data into a bus data buffer area; an encoding module configured to read data from the bus data buffer area or a local data buffer area according to a data selection control signal and output the encoded data; a control signal generation unit configured to generate the data selection control signal according to a preset strategy and a data transmission state; and a data path switching module configured to take the output of the receiving module or the encoding module as the input of the sending module according to the data selection control signal. The slave node device selects the best data path for the entire data frame or each part of the data frame decomposed from the data frame and transmits the data frame by using the best data path, thereby reducing the node delay of the slave node device.

The invention provides a multimedia switching device, a multimedia switching method and a multimedia system. The multimedia switching device comprises a first interface; a second interface; the multimedia transmission path is used for transmitting the multimedia data of the host equipment to the load equipment; the multimedia transmission path is configured to be conducted when the first interface and the second interface are both connected with corresponding equipment; the first power transmission path is arranged between the first interface and the second interface and is used for transmitting a power signal of the host equipment to load equipment; a third interface; the second power supply transmission path is used for transmitting the power supply signal of the power supply equipment to the load equipment; and the control unit is configured to respond to the connection of the power supply equipment and the third interface under the condition that the third interface is the interface of the last access equipment, and control the power supply path of the load equipment to be switched from the first power supply transmission path to the second power supply transmission path, so that the equipment for supplying power to the load equipment is switched from the host equipment to the power supply equipment.