18 results about "FM broadcasting" patented technology

The invention provides a multi-channel multi-mode broadcast receiving device, and the device comprises a micro-control unit which is connected with a storage unit through a bus, and is connected with a vehicle-mounted comprehensive information processing system and a signal processing unit; the storage unit is connected with the micro-control unit through a bus, is connected with the signal processing unit and is used for storing starting codes and preset chip configuration parameters of the signal processing unit so as to transmit the starting codes and the preset chip configuration parameters to the micro-control unit through the bus; the signal processing unit comprises a dual-channel receiving chip and a signal demodulation unit, is connected with the antenna, the storage unit and the micro-control unit, and is used for converting a radio frequency signal of the antenna into an audio signal in a frequency modulation broadcasting mode or a digital audio broadcasting mode according to a control instruction of the micro-control unit so as to send the audio signal to the micro-control unit; the power supply device is in input connection with a power supply, is in output connection with the micro-control unit, the signal processing unit and the storage unit, and is used for converting the input power supply into working voltage required by the device.

The utility model discloses a circuit used for frequency modulation broadcast newly-added service, and relates to the technical field of broadcast communication. The circuit comprises an interface module, a first FPGA module, a first ADC module, a second FPGA module and a signal output module. The interface module is used for acquiring new business data; the first FPGA is used for performing channel coding modulation processing on the new service data according to the channel characteristics of the new service data to obtain new service modulation data; the first ADC module is used for acquiring an original radio frequency signal and performing analog-to-digital conversion processing to obtain an original radio frequency digital signal; the second FPGA module is used for adding the new service modulation data to one side or two sides of a frequency modulation signal channel corresponding to the original radio frequency digital signal to obtain a first combined signal; and the signal output module is used for converting the first combined signal into a first radio frequency emission signal and outputting the first radio frequency emission signal. According to the utility model, the utilization efficiency of frequency resources can be improved, the demand for newly added frequency resources is reduced, and the problem of frequency resource shortage is relieved.

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.

1. Name of the product in this design: FM radio and television transmitter cabinet. 2. Purpose of this design: To house an FM radio and television transmitter. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

This application discloses a frequency setting method, apparatus, device, and storage medium for an FM terminal. The method includes: triggering a timeout when receiving a broadcast signal at the default frequency stops; if the FM broadcast terminal does not receive the broadcast signal at the default frequency within a first signal timeout period, then switching to a pre-switching frequency after the timeout period; and when an RDS signal transmitted by a handheld transmitter is received, parsing the target RDS protocol in the RDS signal to obtain the requested setting frequency, and switching the pre-switching frequency to the requested setting frequency. Therefore, when the FM broadcast terminal does not receive a broadcast signal at the default frequency, there is a need to switch the FM frequency. In this case, there is no need to use a host computer connected to a serial port for setting; simply receiving the RDS signal transmitted by a remote handheld transmitter is sufficient to complete the FM frequency switching, reducing the difficulty of switching the FM broadcast terminal's frequency and improving the FM broadcast terminal's frequency modulation efficiency.

The invention discloses a frequency modulation broadcast intelligent monitoring method based on deep learning, which relates to the technical field of broadcast monitoring, and comprises the following steps: setting a frequency modulation broadcast intelligent monitoring area, and carrying out broadcast spectrum acquisition in the set frequency modulation broadcast intelligent monitoring area; processing the acquired broadcast spectrum data in a data processing mode; after processing is completed, the processed broadcast spectrum data are analyzed through a data analysis method, meanwhile, spectrum classification is conducted on the analyzed broadcast spectrum data through a feature extraction algorithm, finally, the classified broadcast spectrum data are predicted through a model prediction method, and predicted broadcast spectrum data are obtained. Meanwhile, the illegal frequency in the frequency modulation broadcast is dynamically captured and forbidden according to the predicted broadcast spectrum data, so that the accuracy of intelligent monitoring of the frequency modulation broadcast is improved.

The application relates to the technical field of digital communication, and discloses a multi-terminal live broadcast interaction data transmission method and system based on frequency modulation relay, which comprises the following steps: acquiring multi-terminal live broadcast interaction data under frequency modulation relay, extracting delay tolerance characteristics of different data types and constructing a transmission resource allocation matrix; performing repeated data detection on the multi-terminal live broadcast interaction data, combining network delay compensation to establish a time sequence distribution mode of repeated data, generating a check reference sequence; embedding the check reference sequence into a data stream coded according to the transmission resource allocation matrix and the multi-terminal live broadcast interaction data, forming a composite transmission data stream, and performing frequency modulation on the composite transmission data stream to generate a frequency modulation transmission signal; extracting the check reference sequence from the frequency modulation transmission signal at a receiving end, comparing and analyzing the actual distribution of received repeated data, and adjusting the transmission resource allocation matrix according to the comparison result. The application provides data transmission guarantee for the conversion of network data into a frequency modulation broadcast signal.

Techniques for facilitating electric vehicle charging include a consumer vehicle computing device in a consumer's vehicle identifying a mobile charging vehicle and scanning a machine-readable code displayed thereon. The consumer vehicle computing device detects a failure in scanning the code. The consumer selects an AM / FM radio frequency in response to the scanning failure and the consumer vehicle computing device receives a radio broadcast from the mobile charging vehicle on the selected frequency. The broadcast includes charging information. The consumer vehicle computing device transmits a charging connection message to the charging merchant, including the charging information. The consumer vehicle computing device permits the consumer vehicle to receive charging from the mobile charging vehicle.

1. The name of the design product: FM radio transmitter all-in-one (FM 3kW). 2. The use of the design product: for the generation and amplification of audio radio frequency signals, and for the transmission of the generated and amplified audio radio frequency signals over a large area with high quality. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model discloses a single Beidou high-precision positioning terminal based on frequency modulation broadcast communication, which comprises a shell, a positioning antenna and an FM antenna, the positioning antenna and the FM antenna are arranged on the outer side of the shell, the positioning antenna is arranged on one side, deviating from the ground, of the shell, a control panel is arranged in the shell and comprises a signal switching module, a Bluetooth module and an FM module, and the signal switching module is connected with the Bluetooth module. The FM module and the Bluetooth module are connected with the FM antenna through the signal switching module, and the signal switching module is used for switching the FM antenna to be connected with the Bluetooth module or the FM module. In the technical scheme of the utility model, the signal switching module is used for switching the FM antenna 110 to be connected with the Bluetooth module or the FM module, so that the Bluetooth module or the FM module can share one antenna in different time periods during use, interference and suppression between antennas of two different modules are avoided, and the service life of the Bluetooth module or the FM module is prolonged. And the problem that one module cannot be used or is limited in use due to signal interference is prevented.

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 discloses a television station frequency modulation rebroadcasting system based on an improved spectrum sensing method. In the MEHM method, a simple asymptotic substitution method is adopted to solve the calculation of a signal sensing judgment threshold, so that a large deviation is generated between a theoretical judgment threshold and a real judgment threshold, and the improvement of the sensing detection performance of the method is limited. Therefore, the invention provides a television station frequency modulation rebroadcasting system based on an improved spectrum sensing method. According to the system, firstly, a sample covariance matrix of a received signal is calculated by constructing a covariance matrix calculation module; constructing a characteristic value and detection statistic module, and calculating the maximum characteristic value of the sample covariance matrix and the harmonic average of the maximum characteristic value; and finally, constructing a spectrum sensing judgment module, thereby calculating a signal sensing judgment threshold, comparing whether the detection statistic is greater than the judgment threshold, if so, determining that the frequency band has a master user, and otherwise, determining that the frequency band does not have the master user. The system does not need priori knowledge of a main user signal and a wireless channel, and can effectively overcome the influence of noise uncertainty. Compared with some spectrum sensing methods based on characteristic value detection, the improved spectrum sensing method has the advantages that the sensing detection probability is higher, the sensing detection performance more excellent than that of a maximum characteristic value-harmonic average (MEHM) method is obtained, and the improved spectrum sensing method is more suitable for judging frequency modulation rebroadcasting signals in a television station; and the stability and the reliability of the television station frequency modulation rebroadcasting system are improved.

This FM transmitter generates a monaural composite signal by mixing a transmission signal modulated by a monaural sound signal and a broadcast signal obtained by delaying a monaural sound signal by an adjustment delay time. The FM relay device generates a monaural composite signal by mixing a transmission signal extracted from a received host station wave and a broadcast signal obtained by delaying a monaural sound signal demodulated from the transmission signal by a relay time delay time. The adjustment delay time is set to a time longer than a transmission delay time from the host station to the relay station. The relay time delay time is set to a length obtained by subtracting the transmission delay time from the adjustment delay time.

1. The name of the design product: earphone (N1). 2. The use of the design product: for listening to FM (frequency modulation) broadcast. 3. The design points of the design product: the shape of the earphone. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to the technical field of emergency information transmission and processing, in particular to a city-county-town-village linkage emergency broadcasting method, device and equipment and a storage medium, and the method comprises the steps that a county-level emergency broadcasting platform receives and analyzes emergency information from an upper-level emergency broadcasting platform, a current-level early warning publishing system and a transverse department; the emergency information comprises an emergency level, an emergency type and emergency geographic coordinates; generating a hierarchical and classified scheduling scheme according to the level, the emergency type and the geographic coordinate area of the emergency information, wherein the scheduling scheme comprises a resource allocation instruction and a broadcast priority rule; sending the emergency broadcast message to an emergency broadcast terminal in a target area through a main and standby dual-channel transmission network, wherein the main and standby dual-channel transmission network comprises a combination of a wired IP network and a wireless frequency modulation broadcast network; and monitoring the online state, the broadcasting success rate and the coverage area thermodynamic diagram data of the emergency broadcasting terminal in real time, and generating a statistical report containing the timeliness evaluation index. The application has the effect of improving the application scene requirement of the emergency broadcast.

The invention relates to the technical field of digital communication, and discloses a multi-terminal live broadcast interactive data transmission method and system based on frequency modulation transfer, and the method comprises the steps: obtaining multi-terminal live broadcast interactive data under frequency modulation transfer, extracting delay tolerance features of different data types, and constructing a transmission resource distribution matrix; repeated data detection is carried out on the multi-terminal live broadcast interaction data, a time sequence distribution mode of repeated data is established in combination with network delay compensation, and a verification reference sequence is generated; embedding the verification reference sequence into a data stream encoded according to the transmission resource distribution matrix and the multi-terminal live broadcast interaction data to form a composite transmission data stream, and performing frequency modulation on the composite transmission data stream to generate a frequency modulation transmission signal; and extracting a verification reference sequence from the frequency modulation transmission signal at a receiving end, comparing and analyzing the verification reference sequence with the actual distribution of the received repeated data, and adjusting the transmission resource allocation matrix according to a comparison result. And a data transmission guarantee is provided for conversion from network data to frequency modulation broadcast signals.

The embodiment of the utility model discloses an alarm type judging device of a broadcast transmitting system, which is used for judging the alarm type of a multi-channel broadcast transmitting system. The alarm type judgment device of the broadcast transmitting system comprises a preprocessing module, an alarm signal input module, an output logic control module, a switching output module, a logic level conversion module, a display module and a control module. When a fault alarm occurs, an on-duty check-in person can know the type of the fault in time, so that the fault judgment time is saved, and effective emergency disposal is quickly made. The problem that check-in personnel and maintenance personnel cannot visually and timely know the alarm type of the fault transmitting system is solved. Multi-channel alarm signal monitoring can be realized, and more monitoring requirements of a frequency modulation broadcast emission system can be satisfied.