7 results about "Public broadcasting" patented technology

The application provides a service demand-based beam position level skip beam pattern design method, device and equipment, and belongs to the technical field of wireless communication. The method comprises the following steps: the skip beam pattern is used for indicating the beam scanning sequence of the beam position in the non-ground network coverage range, the beam scanning sequence of each beam position is configured according to the priority of each beam position, and the priority is associated with the service traffic of each beam position, the number of ground base stations associated with each beam position and / or the number of users of each beam position; and / or the skip beam pattern is used for indicating the information broadcast timing in the public broadcast information, the first system information block (SIB) is included in the public broadcast information, the service cell basic information and the satellite auxiliary information are included in the first SIB, and the first SIB is periodically broadcast. The service scheduling efficiency can be improved.

The utility model relates to the field of electronic information discloses a public broadcasting device convenient to installation, including bottom plate and public broadcasting body, both sides of bottom plate all are fixedly connected with shell, the one side of two shell bottom is equipped with two strip grooves, the top of two shell inner wall is inserted with the plug -in block, two plug -in blocks are fixedly connected respectively in the both sides of public broadcasting body bottom, the inner wall of plug -in block is equipped with the slot, both sides of shell inner wall bottom all are connected with the clamping piece of sliding, the middle part of shell inner wall bottom is fixedly connected with fixed block, both sides of fixed block all are fixedly connected with spring no.

This utility model relates to the field of pole attachment devices, and more particularly to a pole attachment device for automatically adjusting the direction of a speaker column installation. It includes an annular clamp, a connecting shaft, a speaker column mounting frame, and a drive unit. The annular clamp is a ring-shaped structure fitted onto the pole. The speaker column mounting frame is mounted on the speaker column. One end of the connecting shaft is movably connected to the annular clamp via the drive unit, and the other end is fixedly connected to the speaker column mounting frame. This utility model is particularly suitable for public address systems requiring dynamic adjustment of sound field coverage, as well as flood control and flood warning systems and smart construction site management scenarios. It provides a remotely controllable, automatically adjustable speaker column installation device to improve installation flexibility and management efficiency. It features structural stability, precise orientation, remote control, and strong compatibility. This utility model solves the technical problems of existing fixed speaker columns that cannot be dynamically adjusted after installation, resulting in low efficiency and poor safety of manual adjustment.

We provide the system. [Solution] A data processing means that receives video information from a monitoring system and analyzes the video information to detect abnormal behavior, Information generation means that generates a warning message based on abnormal behavior detected by the data processing means, A signal output means for outputting the warning message, Information communication means for notifying a management information terminal of the results of detecting the abnormal behavior, A sound generation means that generates an audio signal using the warning message and outputs it to a public address system in real time, A system that includes this.

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.

The application relates to the fields of intelligent traffic and public broadcasting, and specifically discloses a standardized volume control strategy generation method and system, which comprises the following steps: obtaining three-dimensional space constraint information and safety early warning event information of a target sound column; calculating space compliance sound power based on the information, and generating a fusion reference acoustic target by combining early warning scenes and point information; mapping the target into a differentiated gain parameter set of a sound column capable of forming a directional sound field; finally, dynamically weighting the parameter set based on the event emergency level and time period identifier, generating and issuing a space-time event joint optimization strategy; the system comprises four functionally corresponding modules. Through intelligent fusion of digital map environment analysis, physical sound field modeling and multi-source business rules, the application realizes the leap of volume control from simple gain adjustment to three-dimensional sound field adaptation and space-time dynamic optimization, effectively solving the core problems of accurate coverage, noise disturbance and automatic execution of standardized standards.

A Class-D amplifier is disclosed, comprising: a switching circuit that generates a switched DC voltage by performing switching between a first DC voltage and a second DC voltage (the first DC voltage and the second DC voltage are applied to the Class-D amplifier through a first voltage terminal and a second voltage terminal, respectively, wherein the DC level of the first DC voltage is higher than the DC level of the second DC voltage); a low-pass filter circuit (including an inductor); a first additional switching circuit coupled between the switching circuit and the inductor; a second additional switching circuit coupled between the inductor and an output terminal for outputting a speaker drive signal from the Class-D amplifier; an amplifier controller that controls the Class-D amplifier to operate in an idle state based on the absence of an input audio signal to the Class-D amplifier (control includes keeping the first additional switching circuit and the second additional switching circuit off during the idle state); and an idle state conduction forming two different circuit paths leading from the second voltage terminal through the inductor to the first voltage terminal, each in a different direction between the two terminals of the inductor. It includes a circuit (in which, during operation of the Class-D amplifier in the idle state, one of two different circuit paths provides conduction from the second voltage terminal through the inductor to the first voltage terminal).