44results about "Broadcast circuit arrangements" patented technology

The utility model discloses an emergency broadcast alarm device for a digital conversation ship, which comprises a protective shell and a loudspeaker, the right end of the top of the inner cavity of the protective shell is movably connected with a rotating shaft through a bearing, the middle end of the rotating shaft is fixedly provided with a second synchronizing wheel, and the bottom of the rotating shaft is fixedly connected with a protective cover. The outer surface of the protective cover is movably connected to the right end of the inner cavity of the protective shell. According to the utility model, through the arrangement of the loudspeaker, sailors can conveniently play the alarm information of the emergency broadcast when the digital communication ship encounters an emergency situation, so that surrounding sailors can timely discover the emergency situation and take corresponding safety measures; through the arrangement of a driving motor, a rotating rod, a first synchronous wheel, a fixing frame, a synchronous belt, a second synchronous wheel, a rotating shaft, a protective cover and a protective shell, the loudspeaker can be effectively stored and protected in the non-use period, and the probability that the loudspeaker is damaged due to the influence of the external environment is effectively reduced.

A radio data receiving device includes a memory, and a processor operatively connected to the memory, wherein the processor is configured to receive a zeroth stream based on a first frequency band about a radio data system (RDS), receive a first stream based on a second frequency band in which the RDS is extended, receive a second stream based on a third frequency band in which the RDS is extended, receive a third stream based on a fourth frequency band in which the RDS is extended, and provide a service about RDS data based on at least one of the first stream, the second stream, or the third stream.

A device control method and apparatus, an electronic device, and a computer-readable storage medium. The method comprises: if device interaction information is detected, determining first interaction feature information corresponding to the device interaction information (101); broadcasting the first interaction feature information to at least one interaction device within a communication range, and receiving second interaction feature information broadcast by each interaction device, wherein each piece of second interaction feature information is determined by each interaction device on the basis of the device interaction information, and at least one device among a current device and the interaction devices is an unprovisioned device (102); determining a device response result on the basis of the first interaction feature information and each piece of second interaction feature information (103); and controlling response of the current device to the device interaction information on the basis of the device response result (104). In this way, screening of response devices in a multi-device scenario is implemented, and the interaction experience is improved.

To reduce the possibility that the audio from the previous audio source will be output from the speaker when switching audio source data used for broadcasting and outputting it through the speaker. [Solution] The processing unit 1 comprises a communication unit 12 and a control unit 10. The communication unit 12 can communicate with a distributed processing unit 2 which comprises an output unit 23. The output unit 23 outputs an audio signal to speaker SP2 of a broadcasting equipment system S1 which has a speaker SP2 for broadcasting. The control unit 10 causes the communication unit 12 to transmit first information and second information to the distributed processing unit 2. The first information is information about the sound source data selected from among a plurality of sound source data as the audio signal to be output to speaker SP1. The second information is information about the switching timing of the sound source data to be used as the audio signal.

A radio data receiving device includes a memory, and a processor operatively connected to the memory, wherein the processor is configured to receive a zeroth stream based on a first frequency band about a radio data system (RDS), receive a first stream based on a second frequency band in which the RDS is extended, receive a second stream based on a third frequency band in which the RDS is extended, receive a third stream based on a fourth frequency band in which the RDS is extended, and provide a service about RDS data based on at least one of the first stream, the second stream, or the third stream.

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.

The communication method according to the present invention is developed for reducing energy consumption of the IoT terminals. The method comprises the process steps of recording and updating the orbital data of the satellite, periodically broadcasting a Beacon signal, determining the coverage area of the next Beacon signal, determining the next passage times of the satellite over the coverage area, determining the next passage of the satellite over the coverage area with an elevation angle above the threshold elevation angle value, transmitting a Beacon signal containing the detected passage data performed by the satellite and the process steps of receiving the Beacon signal, planning transitions between a low-power sleep mode and an awake mode using the passage data performed by the IoT terminals.

The invention discloses a self-starter for a frequency modulation broadcasting standby transmitter and a control method of the self-starter. The self-starter comprises a frequency modulation signal receiving module, an acousto-optic conversion module, a light-operated module, a delay processor and an alternating current contactor; the frequency modulation signal receiving module receives a main transmitter signal through an antenna, the main transmitter signal is converted into an optical signal through the acousto-optic conversion module, the delay processor is triggered after the optical signal is detected by the optical control module, and the alternating current contactor is driven to be connected with a standby transmitter power supply after delay control. The control method comprises the steps of signal receiving and processing, photoelectric conversion, delay judgment and power supply starting, full-automatic and quick starting of the standby transmitter when the signal of the main transmitter is interrupted is achieved, and manual testing, starting, stopping and adjusting can be achieved. The method has the characteristics of quick response, strong anti-interference and flexible operation, and can obviously shorten the broadcast stop time and improve the system reliability.

The utility model discloses a main transmitting station, a broadcast-on-behalf transmitting station and an automatic broadcast-on-behalf frequency modulation transmitting system. The main transmitting station at least comprises at least one main station transmitter used for receiving a corresponding frequency information source; the power detection module is connected with at least one master station transmitter and is used for acquiring level signals of all master station transmitters and sending the level signals corresponding to all master station transmitters to the audio switching module; and the audio switching module is connected with the power detection module, and is used for receiving information sources with different frequencies, selecting the information source with the corresponding frequency through each level signal when the level signal indicates that the main station transmitter has a fault, and sending the information source with the corresponding frequency to a broadcasting transmitting station. The main transmitting station obtains the level signal of the main station transmitter through the power detection module, and the audio switching module selects the information source of the corresponding frequency according to the level signal, so that the information source can be automatically sent to the substitute broadcasting transmitting station when the main station transmitter fails, and the substitute broadcasting transmitting station performs substitute broadcasting.

A radio apparatus for a vehicle and a control method thereof is provided. The radio apparatus and control method may provide an occupant of a vehicle, who cannot listen to an Internet radio, to be able to easily listen to radio broadcasts, even when a reception condition of an analog radio transmitted by a radio broadcasting station is poor. When a vehicle whose occupant can listen to the Internet radio is adjacent to a vehicle whose occupant cannot listen to the Internet radio, the Internet radio to which the vehicle whose occupant can listen, may be converted into an analog radio, and the analog radio is transmitted to the vehicle whose occupant cannot listen to the Internet radio by using one or moddre frequencies.

The utility model discloses a networked broadcast system, which comprises a networked broadcast host server, an Ethernet and a broadcast playing terminal, and the broadcast playing terminal is in communication connection with the networked broadcast host server through the Ethernet. The broadcast playing terminal comprises a networked outdoor partition explanation column loudspeaker, a network visual talkback terminal, a network visual LED screen terminal and an intelligent broadcast lamp post. The networked outdoor partition explanation sound post, the network visual talkback terminal, the network visual LED screen terminal and the intelligent broadcast lamp post communicate with the networked broadcast host server through the Ethernet, and broadcast playing, talkback and LED screen display functions are achieved under the control of the networked broadcast host server. The technical problem that an existing networked broadcasting system is difficult to meet diversified requirements of users is solved.

A method and apparatus for automatically switching the frequency of a vehicle radio. The method includes: receiving, by a first tuner, a first signal at a frequency being listened in the vehicle; determining whether an electric field condition of a second signal received at the alternative frequency satisfies a first criterion; when it is determined that the electric field condition of the second signal meets the first standard, determining whether the similarity between the first signal and the second signal meets a second standard; and when it is determined that the similarity between the first signal and the second signal satisfies a second criterion, automatically switching the reception frequency of the vehicle radio to the alternative frequency. The first criterion and the second criterion are changed in consideration of noise caused by an electric power steering system of the vehicle.

The utility model relates to the field of power amplifier equipment, in particular to four-way networked digital power amplifier broadcasting equipment, a plurality of modules are integrated in a 2U case to form an integrated structure, and each module comprises an input module used for receiving an input signal; the power amplifier module is used for amplifying the decoded signal; the backup module is used for outputting 100V constant-voltage backup broadcast signals; the input end of the network decoding module is connected with the input module, the output end of the network decoding module is connected with the power amplifier module and the backup module, and the network decoding module is used for decoding signals, judging whether the network state is normal or not, enabling the network decoding module to output decoded signals to the power amplifier module when the network state is normal, and outputting the decoded signals to the backup module when the network state is normal. And when the network state is off, the decoding module is switched to output the decoded signal to the backup module. According to the equipment, the cost can be reduced, the installation process is simplified, and the reliability of broadcast equipment is improved.

The invention discloses a handheld emergency broadcasting device convenient to use, which comprises a handheld handle and an emergency broadcasting body, a movable groove is formed in the handheld handle, a supporting rod is movably mounted in the movable groove through a height adjusting mechanism, and a first supporting block is fixedly connected to the top end of the supporting rod. According to the invention, the emergency broadcast body can rotate forwards and backwards along the circumferential direction only by holding the handle, so that the emergency broadcast body swings forwards and backwards at an elevation angle and is used for emergency broadcast during lifting, the propagation range of the whole emergency broadcast is expanded, the limitation in broadcast use is smaller, and the service life of the broadcast is prolonged. The emergency broadcasting device can be realized only by holding the handheld handle at one position, so that the situation that the broadcasting range is changed by holding the broadcasting device and swinging the arm back and forth in the prior art is avoided, the difficulty in emergency broadcasting is greatly reduced, the overall using effect is better, the structure is simple, great convenience is brought to people to use, and the emergency broadcasting device is worthy of popularization and application. The method is suitable for popularization.

The invention relates to a digital regeneration-based static orbit satellite broadcast forwarding system, which is characterized in that a demodulation receiver receives uplink data of a ground station through a receiving antenna, completes data demodulation and transmits the data to a rear-end data processor; the data processor judges whether the uplink data needs to be fused with the real-time remote sensing data or not according to the identifier of the uplink data, and if the uplink data is the data needing to be fused, fusion processing of the uplink data and the remote sensing data is completed in the data processor; if the uplink data does not need to be fused, directly storing the uplink data into the solid-state memory; reading broadcast distribution data from the solid-state memory, and forwarding the broadcast distribution data to the broadcast modulator through the data processor; the broadcast modulator encodes and modulates broadcast downlink data into a radio frequency signal, and the radio frequency signal is broadcast and distributed to a designated area through the transmitting antenna after being subjected to filtering and power amplification. And the use efficiency of broadcast distribution of the geostationary orbit remote sensing satellite is effectively expanded.

The invention provides a global sound amplification device, method and system, and the device comprises a plurality of global sound amplification microphones which are used for wirelessly transmitting audio signals in a preset frequency band range; the plurality of global sound reinforcement receivers are used for receiving and demodulating the audio signals and carrying out networked transmission on the demodulated audio signals and corresponding signal intensity data through an AES67 network protocol; and the global sound reinforcement management host is used for receiving and detecting the demodulation audio signals of the global sound reinforcement receivers and the corresponding signal intensity data, and when the offline signal intensity of the global sound reinforcement receivers is lower than a preset threshold value, the global sound reinforcement receiver with the highest online signal intensity performs audio output. On the basis, continuity and stability of sound amplification signals can be achieved in a large-range scene, the problem of audio interruption or interference caused by signal difference of receivers is avoided, meanwhile, system wiring is simplified in a networked transmission mode, installation and maintenance cost is reduced, and therefore seamless coverage sound amplification in the whole scene range is achieved.

The utility model belongs to the technical field of broadcast substations, in particular to a mining intrinsic safety type broadcast communication substation, which comprises a shell with a communication interface on one side, a vent hole is arranged on one side of the shell, and a dustproof component is arranged on one side of the shell, which is positioned on the vent hole and comprises a protective cylinder fixedly connected onto the outer wall of the shell; and the sealing plate is matched with a cavity groove correspondingly formed in the protective cylinder, two clamping seats are fixedly connected to one side of the sealing plate, and a filtering plate is arranged between the two clamping seats. The dustproof component is arranged on the side, located on the ventilation hole, of the shell, the dustproof component is mainly composed of the protection barrel, the sealing plate, the clamping base, the filter plate, the locking mechanism, the pretreatment mechanism and the like, the filter plate can be rapidly replaced due to the arrangement of the locking mechanism, and the dustproof effect of the device can be improved through the arrangement of the pretreatment mechanism; the problems that a broadcast communication substation at the present stage is not good enough in dustproof effect and a filter plate is not easy to replace are solved.

A method of receiving a Bluetooth Low Energy (BLE) audio broadcast and a Bluetooth Low Energy audio broadcast receiver are described. The BLE broadcast audio receiver receives a broadcast isochronous stream (BIS) intended for playback by the receiver. The BLE broadcast audio receiver receives a further BIS intended for playback by a different BLE broadcast audio receiver. The further BIS is retransmitted by the BLE broadcast receiver.

The utility model relates to the field of broadcast transmitters, and discloses an all-solid-state short-wave AM20kW broadcast transmitter, which comprises a signal source, an exciter, a pre-stage amplifier, a power divider, a plurality of power amplification systems, a synthesizer, a filter and a directional coupler, the output end of the power divider is respectively connected with the input ends of the plurality of power amplification systems, the output ends of the plurality of power amplification systems are connected to the synthesizer, the output end of the synthesizer is sequentially connected with the filter and the directional coupler, and the output end of the directional coupler is connected to a load. Excitation signals are divided into a plurality of power amplification systems in proportion through a power divider, and uniform distribution of the signals in a wide frequency range is achieved. High-power output is guaranteed, good frequency band consistency is maintained, stable transmission of broadband signals is achieved, and the application requirement of a complex short-wave communication environment is met.

A method and apparatus automatically switch a vehicle radio frequency. The method includes: receiving, by a first tuner, a first signal at a current frequency at which listening is being performed in a vehicle; determining whether an electric field condition of a second signal received at an alternative frequency meets a first requirement; determining whether a similarity between the first signal and the second signal meets a second requirement in response to a determination that the electric field condition of the second signal meets the first requirement; and automatically switching a reception frequency of the vehicle radio to the alternative frequency in response to a determination that the similarity between the first signal and the second signal meets the second requirement. The first requirement and the second requirement are changed in consideration of noise caused by an electric power steering system of the vehicle.

The application discloses an emergency broadcast terminal device, and relates to the technical field of communication, which comprises a communication interface (1), a digital mainboard module (2) connected with the communication interface (1) and used for acquiring a data communication signal, a loudspeaker module (3) connected with the digital mainboard module (2) and used for playing a voice signal, a hotspot collection module (4) connected with the digital mainboard module (2) and used for collecting characteristic codes of mobile phone terminals in a coverage range according to radio signals, an antenna (5) connected with the hotspot collection module (4) and used for transmitting and receiving radio signals, and the digital mainboard module (2) used for obtaining the voice signal according to the data communication signal and the characteristic codes of the mobile phone terminals in the coverage range. The application can monitor the crowd dynamics in real time and accurately and automatically give early warning.

The invention discloses a vehicle-mounted broadcast service following seamless switching method and a vehicle-mounted broadcast system.The switching method is applied to the vehicle-mounted broadcast system and comprises the following steps that S1, DAB frequency band signals and / or FM frequency band signals are received at the same time through double antennas, the current DAB or FM service is played through a foreground channel of a DAB module, and the DAB frequency band signals and the FM frequency band signals are received through double antennas; the background channel searches a DAB replaceable service and / or an FM replaceable service corresponding to the same program; s2, the DAB module carries out audio phase and amplitude synchronization processing on the current service and the replaceable service searched in the background, so that audio parameters of the current service and the replaceable service are consistent; s3, collecting the signal quality of the current service and the replaceable service in real time; and S4, judging whether to execute non-delay switching according to the signal quality index. According to the invention, seamless switching of three scenes of DAB-DAB, DAB-FM and FM-DAB is realized, a user does not have any auditory perception, the audio frequency is not abnormal in the switching process, bidirectional switching of analog FM and digital DAB is realized, and the method is suitable for vehicle-mounted broadcast application scenes at home and abroad and is wider in applicability.

The invention relates to an audio transmission system, an audio transmission method and a charging bin device. The audio transmission system comprises an audio acquisition device used for acquiring original audio data; the transmitting terminal equipment is connected with the audio acquisition equipment, and is used for encoding the original audio data to obtain audio data to be transmitted, and encrypting and broadcasting the audio data to be transmitted by using the encryption parameters; the receiving end equipment is used for receiving the password parameter, matching the password parameter with the searched broadcast signal, establishing an encrypted audio channel between the receiving end equipment and the transmitting end equipment in response to matching of the password parameter and the encryption parameter, receiving audio data to be transmitted through the encrypted audio channel, and transmitting the audio data to the transmitting end equipment. And decoding the to-be-transmitted audio data to obtain target audio data. By adopting the method, free matching of the transmitting end equipment and the receiving end equipment can be realized by utilizing the encryption parameter and the password parameter, the receiving end equipment corresponding to the transmitting end equipment does not need to be bound in advance, and the operation complexity of audio transmission is simplified.

The invention discloses an audio broadcast playing method, system and device and a readable storage medium, and relates to the technical field of communication broadcast. The method comprises the following steps: respectively acquiring an initial digital broadcast signal and an initial frequency modulation broadcast signal; performing parallel decoding on the initial digital broadcast signal and the initial frequency modulation broadcast signal to obtain a first broadcast signal corresponding to the decoded initial digital broadcast signal and a second broadcast signal corresponding to the decoded initial frequency modulation broadcast signal; and switching and playing the first broadcast signal and the second broadcast signal based on a preset quality standard. In this way, digital broadcast signal and frequency modulation broadcast signal programs can be obtained simultaneously through a single terminal device, and inconvenience in carrying and operation is avoided; through parallel decoding and seamless switching playing of the digital broadcast signal and the frequency modulation broadcast signal, listening continuity is improved.

The invention provides a radio device for a vehicle and a control method thereof. The radio device and the control method thereof can enable a vehicle occupant who cannot listen to an internet radio station to listen to broadcast content conveniently even if the analog radio reception condition transmitted by a broadcast station is poor. When a vehicle in which an occupant can listen to a network radio is adjacent to a vehicle in which an occupant cannot listen to the network radio, the network radio received by the vehicle in which the occupant can listen to the network radio can be converted into analog radio and transmitted to the vehicle in which the occupant cannot listen to the network radio through one or more frequencies.

This invention provides technology for more effectively transmitting or receiving advanced digital broadcasting services. [Solution] A broadcasting system comprising a broadcasting station device and a broadcasting receiving device, wherein the broadcasting station device includes a downconverter that converts a first audio signal having a first number of channels into a second audio signal having a second number of channels less than the first number of channels, a generation unit that generates specification information that specifies the specifications for audio processing to convert the second audio signal into an audio signal having a first number of channels, and a signal processing unit that processes the converted second audio signal and the generated specification information, including the supplementary information, so that they can be transmitted on a broadcast wave, and the broadcasting receiving device includes an upconverter that applies audio processing to the second audio signal extracted from the broadcast wave based on the specifications specified by the specification information included in the supplementary information extracted from the broadcast wave to obtain a third audio signal having a first number of channels.

The invention relates to a video and broadcast integrated emergency broadcast, and relates to the technical field of emergency broadcast, the video and broadcast integrated emergency broadcast comprises a bearing base, a supporting chassis, a broadcast sound post, a monitoring box, a broadcast centralized control box and a monitoring camera, the top of the bearing base is fixedly connected with a bearing stand column, the bearing stand column is provided with an adjusting groove, and the inner wall of the adjusting groove is fixedly provided with a band-type brake stepping motor; the band-type brake stepping motor is fixedly connected with a ball screw, the outer wall of the ball screw is in threaded connection with a lead screw nut, the two sides of the lead screw nut are fixedly connected with connecting rods, the connecting rods on the two sides are fixedly connected with the supporting chassis, and the broadcast sound post, the monitoring box and the broadcast centralized control box are installed on the top of the supporting chassis. According to the invention, the maintenance, disassembly and assembly work of the emergency broadcast can be conveniently carried out, and the equipment can be protected in extreme weather, so that when an accident occurs, a worker can timely send an emergency forecast and an emergency command through the broadcast and can carry out video monitoring on a broadcast area through the camera.

The invention provides a DDS-based dual-receiving communication radio station and a transceiving control method thereof, relates to the technical field of communication radio station equipment, and solves the limitation problems of complex transceiving channel hardware, high cost, large size and the like in a dual-receiving working mode of an existing communication radio station. In the radio station, a receiving link comprises an LNA, a frequency mixer, an intermediate frequency filter, a variable gain amplifier, an intermediate frequency A / D unit, an FPGA and an audio D / A unit which are connected in sequence, and the FPGA is further connected to the variable gain amplifier through an additional D / A unit; the transmitting link and the receiving link share the FPGA, the transmitting link comprises an audio A / D unit, the FPGA, a DDS chip, an amplifier, a low-pass filter and a one-out-of-two radio frequency switch which are connected in sequence, and a second output end of the one-out-of-two radio frequency switch outputs a local oscillation signal to a frequency mixer of the receiving link. According to the invention, a DDS chip is used as a core architecture, and a software algorithm is combined to realize dual receiving and generate a modulated emission radio frequency signal.

System for receiving a satellite signal acquired by an antenna (A), the satellite signal comprising a first signal of interest (R) and a second signal of interest (L) having different polarizations, the system for receiving a satellite signal comprising: a first channel (2R) comprising a first frequency converter (211) configured to frequency shift the first signal of interest (2R) and to apply a first gain (G1), a second channel (2L) comprising a second frequency converter (212) configured to frequency shift the second signal of interest (2L) and to apply a second gain (G2), a centralized processing unit (1) configured to: estimate a first difference between a power of the first signal of interest (R) measured downstream of the first frequency converter (211) and a first saturation power ( ) constituting a limit of a linear operating domain of the first channel (2R),command an adjustment of the first gain (G1) from the first deviation, so as to reduce the first deviation and maintain the power of the first signal of interest (2R) below the first saturation power (), estimate a second deviation between a power of the second signal of interest (L) measured downstream of the second frequency converter (212) and a second saturation power () constituting a limit of a linear operating domain of the second channel (2L), command an adjustment of the second gain (G2) from the second deviation, so as to reduce the second deviation and maintain the power of the second signal of interest (L) below the second saturation power (). Figure for the abstract: Fig. 4,

Embodiments of the present application disclose a broadcast scheduling method based on a DAB double-tuner system, related equipment and a storage medium. The method comprises: the method is applied to a DAB double-tuner system, the DAB double-tuner system comprises a first tuner and a second tuner, the method comprises: when the first tuner plays a first program, the second tuner searches for a traffic broadcast and a second program, the second program is an alternative program of the first program, and the signal strength of the second program is higher than or equal to a preset strength threshold; when the second tuner searches for the traffic broadcast, the second tuner informs the first tuner to play the traffic broadcast; when the first tuner plays the traffic broadcast, the second tuner searches for the traffic broadcast and the second program; when the traffic broadcast is played, the first tuner plays the first program; when the first signal strength of the first program is lower than the strength threshold, the first tuner informs the second tuner to play the second program. When the program signal quality is poor, the alternative program can be switched in time through the scheme, and the user experience is improved.