65 results about "Broadcasting technology" patented technology

The invention provides an emergency broadcast playing method and system for disasters in an outdoor scene, and relates to the technical field of emergency broadcasts, cameras in a region are adopted to monitor the evacuation state of personnel in the outdoor scene in real time, and an emergency broadcast system and a rescue system are triggered through the evacuation state to perform linkage, so that bidirectional information transmission is realized; and the priority of the broadcast content played by the emergency broadcast is adjusted according to different instruction information in bidirectional information transmission, so that the broadcast content has pertinence, and rescue workers can receive key instructions.

The invention provides an audio playing method and device, computer equipment and a storage medium. In the embodiment of the invention, a receiving device receives an audio data stream which is broadcasted by a sending device and carries an expected playing delay, and plays the audio data stream when the time from the current time to the sending time of the audio data stream reaches the expected playing delay, the expected playing delay is used for indicating the time difference between the sending moment and the time difference when the sending device plays the local stream, the sending moment represents the moment when the audio data stream is sent out from the sending device, and the local stream is used for being combined with the audio data stream to present the media content. Based on this, a synchronization scheme suitable for a local stream and an audio data stream oriented to a connectionless audio broadcasting technology can be realized, the problem of sound and picture asynchronization in scenes such as video playing and the like is avoided by using relatively low cost, and the user experience is improved.

The invention relates to the technical field of digital network broadcasting, in particular to a multifunctional integrated digital network broadcasting system based on an intelligent algorithm. Comprising a multi-modal data acquisition module, a broadcast content generation module, a broadcast scheduling decision module, an abnormal interference suppression module and a terminal collaborative feedback module. The multi-modal data acquisition module collects multi-source information of a coverage area in real time. And the broadcast content generation module performs intelligent clustering analysis based on the information to generate structured content. And the broadcast scheduling decision module adopts a graph attention scheduling algorithm to optimize a scheduling strategy. And the abnormal interference suppression module identifies an interference source by using a residual convolutional network, and repairs an interfered signal through a recurrent neural network. And the terminal collaborative feedback module executes playing and data feedback, and dynamically adjusts receiving parameters and pushing strategies by means of federal reinforcement learning. The intelligent level, the adaptability, the user satisfaction and the overall service efficiency of the digital network broadcasting system are remarkably improved.

The invention provides a 5G NR broadcast terminal cross-process multi-service scheduling system, and belongs to the technical field of 5G communication, and the system comprises an application interface module which is responsible for interacting with other applications, providing a service list and processing a subscription request; the task scheduling module focuses on solving broadcast session opening conflicts and reasonably arranging a task execution sequence; the data transmission module is responsible for data transmission in different modes; the data storage module realizes task list and file cache management; and the chip adaptation module carries out packaging adaptation on SDKs of different chips. According to the invention, the terminal performance can be optimized, the user experience can be improved, and the advantages of the 5G NR broadcast technology can be fully exerted.

The invention discloses an emergency broadcasting method and system integrating a Beidou short message and a LoRa technology, and relates to the technical field of satellite communication and emergency broadcasting, in particular to the emergency broadcasting method and system integrating the Beidou short message and the LoRa technology. Comprising an emergency broadcast platform, a Beidou short message transmission network, a LoRa Internet of Things distribution network and a multimode emergency broadcast terminal. Cross-regional backbone transmission without dependence of a ground network is realized through a Beidou satellite link, and localized and low-cost data distribution and terminal access are carried out by using a LoRa network. The multi-mode terminal supports multi-channel receiving, broadcasting and state returning and has multi-energy power supply guarantee. According to the invention, an emergency information transmission system with integrated space and ground, longitudinal penetration and transverse cooperation is formed, and high reliability, wide coverage and rapid transmission of emergency information in an extreme environment are ensured.

The invention relates to the technical field of intelligent broadcasting, in particular to a data transmission method for intelligent broadcasting, which comprises the following steps of: presetting a point location in a scene, and receiving data information issued by a server through the point location; after processing the data information, carrying the data information through an optical signal and sending the data information; the receiving end receives and extracts the optical signals carrying the data information, and converts the received various optical signals into electric energy to charge receiving end equipment; and decoding the extracted optical signal to obtain data information. The problems of interference control, content maintenance and energy management existing in a traditional broadcasting system are solved, and the system is particularly suitable for application scenes with high requirements for information safety and equipment endurance.

The invention discloses a high-reliability digital broadcasting system and an abnormal fast continuous broadcasting method, and relates to the technical field of communication technology and emergency broadcasting, and the high-reliability digital broadcasting system comprises a server A, a server B, broadcasting terminal equipment and a server abnormity recovery module, the server A is provided with two redis sentry nodes, and the server B is provided with one redis sentry node; the server exception recovery module is used for switching the broadcast and quickly continuing the broadcast when the server is exceptional; when a server is started, a redis monitoring sub-process is started, and the redis monitoring sub-process performs fault transfer and master and slave node adjustment according to a local state when a master node is offline by checking the local state, the master node state and redis sentinel node information. According to the invention, when the server is abnormal, the broadcast task which is being executed can be continuously executed within one second, so that the continuous playing efficiency is greatly improved; according to the method, the redis sentry cluster is deployed by using the two servers, so that the number of the servers can be reduced, and the cost is effectively reduced.

This invention provides a helicopter-mounted seeding device based on a novel broadcasting technology, relating to the field of broadcasting technology. The helicopter-mounted seeding device includes three outriggers with isosceles triangular endpoints and a hopper fixed between the three outriggers. Two of the outriggers running longitudinally are each fixedly equipped with stabilizing rudders to increase balance. On opposite sides of the three outriggers, from top to bottom, are an upper beam, a connecting beam, and a lower beam. The connecting beam is triangular and includes a left connecting beam, a rear connecting beam, and a right connecting beam. A power supply is mounted at the midpoint of the upper end of the rear connecting beam via a power mounting plate. Gasoline engine mounting plates are mounted on the upper ends of the left and right connecting beams via No. 4 bolts, and a gasoline engine is mounted on the gasoline engine mounting plates. This invention not only meets the requirements for aerial seeding of various crops but also reduces the impact of cylindrical circulation and increases the balance of the hopper by adding a stabilizing rudder structure.

The present application discloses a teacher status detection method, device, and storage medium, and relates to the field of recording and broadcasting technology. The method includes: identifying a first target object in a teacher panoramic image, and identifying a second target object in a student panoramic image, wherein the first target object and the second target object are both imaging results with the teacher as the shooting target; determining the change trend of the first target object according to the teacher panoramic image and the historical teacher panoramic image, and determining the change trend of the second target object according to the student panoramic image and the historical student panoramic image; determining the target object state according to the first target object and the corresponding change trend and the second target object and the corresponding change trend, and the target object state includes the state of going up the podium and the state of going down the podium. Through the above-mentioned technical means, the error caused by the difference in the height of the teacher when detecting the state of going up and down the podium by a single panoramic image can be eliminated, and the problem that the state of going up and down the podium of the teacher cannot be accurately judged in the prior art can be solved.

The embodiment of the invention relates to the technical field of audio and video broadcasting, in particular to a multi-terminal audio and video synchronization method and device, a video transmission system and a readable storage medium, and the method comprises the steps: generating a first frame starting signal for synchronization through a first frame starting signal generation module, and outputting the frame starting signal to each audio and video terminal as a synchronization signal; a second frame starting signal generation module is arranged in each audio and video terminal, a second frame starting signal is obtained through the second frame starting signal generation module, a clock frequency deviation value is obtained through calculation according to the first frame starting signal and the second frame starting signal, and finally a synchronous clock is obtained; and each audio and video terminal synchronously outputs the original audio and video data according to the clock frequency deviation value and the first frame starting signal. The method is low in implementation and deployment difficulty, low in cost burden and good in flexibility.

The invention relates to the technical field of broadcasting, and discloses an abnormity monitoring and warning system based on DRM digital amplitude modulation broadcasting signals, which comprises a control main board, a delay warning setting board, an audio amplitude display board, a tuning screen board and a power supply module, the control main board adopts a main control chip of a high-performance single-chip microcomputer for logic control; the delay alarm setting board is composed of a TM1637 LED drive control special circuit, an LED nixie tube and four function keys. The audio amplitude display panel monitors the audio amplitudes of the signal source signal and the tuning signal in real time through two independent signal processing channels; the tuning screen board comprises a high-precision display unit and a multifunctional control panel. The DRM digital amplitude modulation broadcast audio signal can be received and demodulated without changing a broadcast link of an original transmitting station, whether the signal source audio of the transmitting station and the received audio signal break down or not is monitored and analyzed, the corresponding audible and visual alarm information is sent out when the fault occurs, and the manual inspection intensity is effectively reduced.

The invention provides a group control method based on a wireless expansion broadcast technology, and relates to the technical field of wireless communication. The method is applied to a group control system, and comprises the following steps: a mobile terminal sends a broadcast packet to a node device, the node device being a sub-device in a sub-device group; after acquiring the broadcast packet, the node equipment broadcasts the broadcast packet to other sub-equipment in the sub-equipment group; the broadcast packets comprise a first broadcast packet and a second broadcast packet, the first broadcast packet is a basic broadcast packet, the second broadcast packet is an extended broadcast packet, and the second broadcast packet comprises a group control instruction; the sub-equipment acquires a second broadcast packet based on the first broadcast packet after acquiring the first broadcast packet, and extracts a corresponding control instruction from the second broadcast packet; and the sub-equipment in the sub-equipment group responds to the control instruction to execute corresponding operation. According to the method, the transmission efficiency is improved, and the real-time performance and the consistency of sub-device group control are improved.

The invention provides a millisecond-level forced insertion intelligent adaptation method and system for a multi-mode emergency broadcast large screen, and relates to the technical field of emergency broadcast, and the method comprises the steps: 1, receiving an emergency broadcast signal from a superior emergency broadcast platform and at least one path of external multimedia input signal; and step 2, performing preprocessing and caching based on a divide-and-conquer strategy on the emergency broadcast signal and the external multimedia input signal, decomposing each path of input signal into independent signal processing subtasks by the divide-and-conquer strategy, performing decoding and caching operation on each subtask in parallel, and endowing the emergency broadcast signal with the highest priority. According to the invention, rapid broadcasting of the emergency information, multi-mode fusion display and intelligent recovery of the playing state are realized.

The invention discloses a broadcast equipment noise management and control system in the technical field of broadcast, the system can be carried on broadcast equipment with a processor for use, the system comprises a processing center, and the processing center comprises an audio collection unit, an audio processing unit and an audio processing unit, the audio conversion unit is used for converting audio signals of the mobile phone and comprises a conversion module; the audio analysis unit is used for analyzing audios and sound waves and comprises a waveform checking module, a waveform analysis module and a phase recognition module; and the noise processing unit is used for processing and reducing the audio noise. The audio noise reduction and the volume self-adjustment are carried out on the basis of the cross-correlation algorithm and the cosine similarity algorithm by acquiring the played audio and the environmental noise data in real time, so that the noise reduction operation of the broadcasting equipment is realized, the method can be applied to various broadcasting equipment, the audio noise during broadcasting is reduced, and the broadcasting effect is improved.

This invention discloses a low-power DTMB transmitter carrier recovery and constellation mapping enhancement method and platform, belonging to the field of terrestrial digital television broadcasting technology. The transmitter samples feedback signals from the intermediate frequency (IF), RF preamplifier, or power amplifier output. Based on the PN420, PN595, or PN945 frame header characteristics, it performs cyclic correlation, sliding correlation, or segmented correlation to obtain frequency offset, phase error, and correlation confidence, and drives a digital phase-locked loop to complete transmitter carrier self-calibration. The system generates non-uniform pre-scaling and pre-rotation parameters based on the feedback constellation error, causing the antenna port constellation to converge to a standard DTMB constellation; enhanced constellation mapping is enabled when supported by a dedicated receiver. The low-power control module reduces power consumption and improves transmission quality based on correlation confidence, EVM scheduling correlator, phase calculation, constellation pre-compensation, digital predistortion, and Doherty power amplifier bias.

The invention discloses an OTA upgrading method and system based on 5G NR broadcast, belongs to the technical field of 5G NR broadcast, and aims to solve the technical problem of how to improve the OTA upgrading efficiency, reduce the cost and improve the OTA upgrading safety and user experience. According to the technical scheme, the method comprises the steps of upgrading plan making and upgrading information processing, wherein an OTA upgrading server makes a detailed OTA upgrading plan according to the type and version condition of terminal equipment, and the upgrading time, the upgrading object and the upgrading content are determined; according to the OTA upgrading plan, upgrading information including an application ID, a version description, verification information and an applicable terminal identifier is generated and arranged into a format suitable for 5G NR broadcast transmission, the upgrading information is encrypted, encrypted upgrading information is generated, and the upgrading information, the encrypted upgrading information and the OTA upgrading plan are stored at the same time; broadcasting resource allocation and session establishment; broadcasting upgrading information; and the terminal equipment receives and processes.

This invention discloses a multi-terminal network audio broadcasting system, belonging to the field of audio broadcasting technology. It includes a central server and multiple distributed audio terminals. The central server comprises: a geographic information module for storing digital elevation models and the deployment locations of each audio terminal; an adaptive coding module for dynamically adjusting the redundancy coding rate of the audio stream based on link quality feedback reported by each audio terminal; and a routing calculation module for generating a multi-hop broadcast tree based on a terrain-compensated propagation loss model. Each audio terminal includes a positioning module for collecting its real-time geographic coordinates and reporting them to the central server. This invention achieves accurate path loss calculation, adaptive redundancy coding, dynamic power adjustment, intelligent broadcast tree construction, efficient packet loss recovery, and dynamic relay coverage, improving the coverage, stability, and energy efficiency of audio broadcasting.

The invention discloses a global digital emergency broadcast and emergency start fusion method and system, and relates to the technical field of digital emergency broadcast, and the method comprises the steps: carrying out the parallel scanning of DAB, DRM, CDR, FM and AM broadcast frequency bands through a multimode radio frequency front end of terminal equipment, and continuously monitoring each standard beacon frame to detect an emergency identifier; when any system detects an emergency identifier, event type, grade, position and time information is extracted, fusion verification is carried out through cross-system semantic alignment and a credibility scoring model, and an emergency credibility score ETS is generated; if the ETS is larger than a preset threshold value, it is judged that the emergency event is an effective emergency event, the emergency event is packaged into a lightweight emergency broadcast compressed packet EBP, and the EBP comprises an event unique identifier, a geographical range, a response action list and a digital signature; and activating a short-distance communication module of the terminal, and carrying out decentralized relay propagation on the EBP to adjacent equipment in the LoRa or BLE Mesh network based on a geographical hash routing algorithm.

The utility model belongs to the technical field of medium-wave broadcasting, and relates to a one-tower multi-frequency self-standing medium-wave transmitting tower, which mainly comprises a plurality of supporting upright posts, a feeder line central upright post for fixedly transmitting a transmitting signal, and a plurality of insulating devices which are arranged on the supporting upright posts and partition the supporting upright posts into independent transmitting units, the height of each transmitting unit can be determined according to the required transmitting frequency, and the tower column is further adjusted to achieve the optimal transmitting effect; and compared with a traditional launching tower, the contact area with air is reduced, the device can be suitable for different seasonal changes, manual adjustment of the network is not needed, and adaptability and reliability are high. According to the utility model, the integrated self-standing tower column is provided with a plurality of transmitting units, so that the integrated self-standing tower column can simultaneously transmit various signals with different frequencies, the structure is simplified, the cost is reduced, the occupied area is saved, and the signals are efficiently transmitted; the whole design is scientific and reasonable, the structure is simple, the land cost can be effectively saved, the manpower demand is reduced, and the application degree is improved.

The application relates to an artificial intelligence technology and discloses a multi-person cooperative virtual interaction method based on MR recording and broadcasting technology, which comprises the following steps: constructing a teaching auxiliary courseware according to relevant course data of any course, expanding the teaching auxiliary courseware to obtain an assembly interaction system, performing orthogonal transformation on a three-dimensional virtual model constructed based on the assembly interaction system to obtain a transformed model, mapping the transformed model to a world coordinate system and constructing a virtual simulation platform corresponding to the transformed model in the world coordinate system, creating a stream socket corresponding to a user terminal and establishing a connection between the user terminal and the virtual simulation system based on the stream socket, and enabling a user corresponding to the user terminal to perform a virtual interaction operation in the virtual simulation system when a content interaction request is received. The application further discloses a multi-person cooperative virtual interaction device based on the MR recording and broadcasting technology. The application can solve the problem of low efficiency of multi-person cooperative virtual interaction based on the MR recording and broadcasting technology.

The application discloses a media broadcast master-slave node switching method and system and a medium, relates to the technical field of media broadcast, and realizes real-time collection of master node playing state update information, running information and master node fault information on the premise of keeping the time synchronization of a slave node and a master node; the master node playing state update information is analyzed, the local playing state cache of the slave node is updated according to the analysis information, and an AI monitoring model performs state evaluation on the master node; when the master node fault information is collected or the master node state is evaluated to be abnormal, a switching instruction is triggered; the switching instruction is executed based on an application layer switching protocol; the scheme is improved in the method based on the prior art, high-precision time synchronization technology, an application layer protocol and artificial intelligence monitoring are fused, the audio stream can be rapidly and seamlessly switched to the slave node when the master node is down or the network is abnormal, the continuity of client playing is ensured, and the reliability of audio broadcast is improved.

The embodiment of the invention relates to the technical field of audio and video broadcasting, in particular to a sound box overload detection method, device and system, and the method comprises the steps: obtaining the audio data of sound box equipment, and carrying out the classification processing of the audio data, and obtaining a root mean square value; inputting the root-mean-square value into a preset overload prediction model to obtain an overload prediction value; performing electrical detection processing and overload judgment processing on the sound box equipment to obtain an actual state value of the sound box equipment; and performing dynamic charging control on the sound box equipment according to the overload prediction value and the actual state value. By comprehensively analyzing the frequency domain characteristics and the electrical parameters of the audio data, real-time prediction of the overload risk and dynamic charging strategy adjustment are realized, and the method has the advantages of predicting the overload risk of the loudspeaker box in real time and dynamically adjusting the charging strategy to avoid equipment overload, so that the system safety is improved, and the service life of the equipment is prolonged.

The utility model belongs to the technical field of emergency broadcast, and discloses a high-reliability emergency broadcast active publishing terminal, which comprises a master control intelligent processor, a communication module, a camera shooting assembly, a sensor assembly, an FM module, an audio coding and decoding chip and an audio power amplifier module, the communication module is in signal connection with the master control intelligent processor; signal input ends of the camera component and the sensor component are connected with a signal output end of the master control intelligent processor; the master control intelligent processor is in signal connection with the FM module and the audio coding and decoding chip. The signal output end of the FM module is connected with the signal input end of the audio coding and decoding chip; the signal output end of the audio coding and decoding chip is connected with the signal input end of the audio power amplifier module. According to the utility model, on the basis of an environment perception target identification technology, different sensors are matched to communicate with the master control intelligent processor according to scene requirements, so that the surrounding environment can be accurately identified.

The present invention relates to the field of digital radio broadcasting technology, and more particularly to a method for modeling DRM broadcast services through simulation and deduction, comprising: establishing a broadcast service intensity model based on the average traffic volume of broadcast services per unit time within a historical broadcast cycle, setting the time interval of broadcast services and the size of each broadcast traffic volume; obtaining a numerical range for each type of broadcast service within the historical broadcast cycle; generating corresponding types of broadcast services using the broadcast service intensity model; establishing an adjustment coefficient based on current environmental conditions based on an adjustment coefficient model to adjust the traffic volume intensity simulated by the broadcast service intensity model; and simulating a broadcast operation diagram based on the broadcast service intensity model. The DRM broadcast service modeling method provided by the present invention can simulate DRM broadcast service generation on a simulation platform by simply setting simulation parameters, thereby resolving the drawback that existing communication service simulation generation technologies are difficult to apply to DRM broadcast simulation service generation.

The invention discloses a self-security emergency broadcast platform based on a dynamic secret protocol, and particularly relates to the technical field of emergency broadcast. The method comprises the following steps: establishing a secure channel between an emergency broadcast control end and a broadcast terminal, negotiating an initial system secret, calculating dynamic secret data based on a preset hash function, carrying out dynamic updating on the dynamic secret data and a current system secret, and realizing equipment identity re-authentication by utilizing a symmetric encryption process. According to the method, a session key special for a current communication session is generated through a key derivation algorithm, the generated session key is used for carrying out encryption transmission and decryption receiving on an emergency broadcast instruction, finally, abnormal state judgment and safety control are carried out on a broadcast terminal, and continuous safety of the emergency broadcast instruction transmission process and reliability of equipment operation are ensured.

The utility model provides a plush toy with a voice broadcast function, which relates to the technical field of plush toys and comprises a plush shell. Five antennas are sewn at the upper end of the surface of the plush shell; the two sides of the plush shell are provided with symmetrical tentacles in a sewn mode respectively. The broadcasting machine is placed in the inner cavity of the stuffed toy, and the two plastic inner shells are installed on the periphery of the broadcasting machine for wrapping protection, so that the stuffed toy cannot make contact with the broadcasting machine when being touched, the broadcasting machine is effectively protected, meanwhile, the broadcasting machine slides front and back in the two plastic inner shells, the broadcasting machine is stably started and stopped, and the service life of the broadcasting machine is prolonged. Through the voice broadcasting technology, the stuffed toy can interact with a user, and the problems that a broadcasting machine is placed in an inner cavity of the stuffed toy for voice broadcasting, so that the broadcasting machine needs to be wrapped and protected, the broadcasting machine is frequently touched if the broadcasting machine is not well protected, broadcasting is not clear due to the fact that parts on the broadcasting machine are loosened, and the service life of the stuffed toy is influenced are solved. And the use of the user is influenced.

The invention provides a digital television emergency broadcast dynamic scheduling method and system based on state estimation, and relates to the technical field of emergency broadcast broadcasting, and the method comprises the steps: S0, dividing a target region into a closed region and an open region based on the type of a digital television; the method comprises the following steps: S1, when current emergency information related to a target area is received, obtaining historical startup and shutdown logs of all household digital televisions in a closed area, and obtaining initial coverage ranges of all public digital televisions on grids in an open area and historical people flow data collected by all cameras; s2, pre-estimating a first coverage range generated when the household digital television plays the current emergency information based on a historical startup and shutdown log; s3, estimating a second coverage range generated by spreading the current emergency information played by the public digital television on the grid based on the historical people flow data and the initial coverage range; and S4, rendering the target area based on the first coverage range and the second coverage range.

The present invention relates to a method for broadcasting data, the method being implemented at a transmitting device and comprising: - extracting a set of objects from the data by using a content extraction method; and - broadcasting the set of objects by using a broadcasting technique; wherein the data comprises audio or video data associated with an audio or video content; wherein the set of objects incompletely represents the audio or video content; wherein the content extraction method comprises an Artificial Intelligence, AI, -based extraction algorithm.

The application discloses an audio transmission method of a networked broadcast system and the networked broadcast system. A networked host receives audio messages to be sent, determines the serial numbers corresponding to each audio message, sequentially puts the audio messages into a sending buffer according to the serial numbers, establishes a sliding window in the sending buffer, and sends the audio messages in the sliding window to a networked decoding terminal. After receiving the audio messages, the networked decoding terminal feeds back acknowledgement packets corresponding to the audio messages. If the networked host determines that the acknowledgement packets corresponding to all the audio messages in the sliding window have been received, the networked host deletes the audio messages in the sliding window in the current sending buffer. The method can feed back the receiving conditions of the audio messages through the networked decoding terminal, facilitates the realization of packet loss recovery, is beneficial to reducing the phenomenon of audio playing lag, meets the normal business operation requirements of customers, and improves user experience. The application can be widely applied in the field of broadcast technology.

This utility model relates to the field of public address technology, specifically to an ultra-thin digital flat panel loudspeaker device for optical network visual linkage broadcasting. It includes an optical network interface, a frame assembly, a surface sound source system, a signal processing module, a visual recognition component, and a cluster collaboration component. The frame assembly includes a surrounding frame integrating the optical network interface, a metal base plate, an insulating base plate, and sound-permeable metal mesh panels on both the front and back. By relying on the ring network cascading function of the network switch module to form serial broadcast terminal nodes, and combining this with the volume differentiation control of the digital power amplifier module to form directional guidance, it effectively improves the efficiency of emergency broadcasting and evacuation during disasters. Furthermore, by relying on optical cables to construct a ring network dual-link redundant network architecture, it forms a fully optical network broadcasting system, solving the problem of low connection reliability that easily occurs when traditional network cables are connected to loudspeakers, and avoiding the technical drawbacks of traditional network cables such as network interruptions caused by electromagnetic interference and high data transmission error rates, ensuring stable transmission of broadcast signals in complex environments.