12 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.

A machine automation system for controlling and operating an automated machine. The system comprises a controller and a sensor bus comprising a central processing core and a multimedia transport intranet for enabling dynamic bursting for a broadcast transmission scheme. Wherein messages are burst from the nodes to the central processing core and broadcast from the central processing core to all nodes.

The invention provides a multimedia transmission method based on priority and security auditing. The multimedia transmission method comprises the steps that a second multimedia terminal initiates a multimedia transmission session application to a first multimedia terminal; the first multimedia terminal senses the network topology and selects a content security auditing service according to the session application; calculating a transmission path transmitted from the first multimedia terminal to the second multimedia terminal; the first multimedia terminal generates a flow table rule according to the transmission path and the network topology, and sends the flow table rule to the communication equipment; the first multimedia terminal performs priority distribution on the multimedia information to be transmitted by adopting a priority weight distribution strategy; transmitting the multimedia information with the allocated priority to a second multimedia terminal through the communication equipment; the second multimedia terminal carries out fusion display on the multimedia data sent by the first multimedia terminal; according to the invention, the multimedia data are transmitted according to different priorities, and the data with high real-time requirements are transmitted preferentially, so that the lagging or delay caused by network congestion can be avoided.

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 invention relates to the technical field of automobile electronics and multimedia transmission, in particular to an automobile video screen projection method, system and equipment based on Android window copying, and aims to overcome the defects of poor stability, high coupling degree of an initiating end and a receiving end, high resource consumption, high delay, video quality loss and the like in the existing automobile video screen projection technology. The method comprises the following steps: creating an off-screen window, loading a video rendering view, and obtaining a SurfaceControl object corresponding to the off-screen window; the method comprises the following steps of: creating a mirror image SurfaceControl object by taking a SurfaceControl object of a window outside a screen as a source; the method comprises the following steps: creating a SurfaceView component in a receiving end device, and obtaining a SurfaceControl object corresponding to a SurfaceView; and binding a parent level of the mirror image SurfaceControl object to a SurfaceControl object of a SurfaceView at a receiving end, so as to realize video projection screen display, wherein the parent level of the mirror image SurfaceControl object is bound to the SurfaceControl object of the SurfaceView at the receiving end. According to the scheme, based on a SurfaceControl mechanism of an Android system, the decoupling of the initiating end and the receiving end is realized through the creation of the window outside the screen, the mirroring of the SurfaceControl and the rebinding of the SurfaceControl.

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.

The invention discloses a multimedia transmission method and related equipment, which can realize multimedia transmission through satellites in an area which cannot be covered by a ground mobile communication network. For example, when a first device is in a network-free state, a first operation is received for triggering transmission of multimedia to a second device. The first device sends N multimedia data streams to the satellite, the N multimedia data streams are data streams obtained by compressing multimedia, N is a positive integer, the data volume of each data stream in the N multimedia data streams does not exceed a first threshold, and the first threshold is smaller than or equal to the transmission bandwidth of the satellite; the total data volume of the N multimedia data streams does not exceed a second threshold.

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.

This invention relates to the field of multimedia technology and discloses a multimedia system integrating intranet and extranet video conferencing functions. The system includes: a first display, a second display, an intranet video conferencing terminal, an extranet video conferencing terminal, and a multimedia transmission system. The multimedia transmission system includes: a signal acquisition module for acquiring intranet video signals from the intranet video conferencing terminal and extranet video signals from the extranet video conferencing terminal; a signal processing module for processing the intranet and extranet video signals and setting the video signals to be received by the first and second displays according to the video conferencing content displayed on the first and second displays; and a signal output module for outputting the corresponding video signals to the first and second displays so that the first and second displays can display the video conference. This system integrates intranet and extranet video conferencing, reduces system complexity, and ensures stable and reliable operation.

Methods and systems for prediction audience ratings are disclosed. A database of television (TV) viewing data may include program records for a multiplicity of existing TV programs. A system may receive a training plurality of program records from the TV viewing data, and for each program record a most similar TV program based on content characteristics may be identified. A synthetic program record may be constructed by merging features of each record and its most similar record. Audience performance metrics may be omitted from synthetic records. An aggregate of the training plurality of program records and the synthetic program records may be used to train a machine-learning (ML) model to predict audience performance metrics of the new or hypothetical TV programs not yet available for viewing and / or not yet transmitted or streamed.

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.