7 results about "Dsp algorithms" patented technology

The invention relates to the technical field of intelligent adjustment of audio equipment, and discloses a system for automatically adjusting loudspeaker volume and sound effect according to wind sound volume, which comprises a wind noise acquisition module, an audio processing module, a main control module and a loudspeaker module, and is characterized in that the modules are sequentially in signal transmission connection. The loudspeaker volume and the sound effect type are dynamically adjusted according to the wind noise level, the wind noise is not counteracted to retain environment sound perception, and the problems that an existing noise reduction scheme is not real, influences safety and is not adaptive to the wind noise adjustment sound effect are solved. According to the invention, the wind noise acquisition module adopts a loudspeaker periphery distributed microphone layout, and captures a wind noise and environmental noise mixed signal near a loudspeaker at 360 degrees, thereby avoiding irrelevant noise interference; the audio processing module separates and recognizes the wind noise through a special DSP algorithm, and accurately judges the wind noise level by combining with the comparison of a wind noise feature database, thereby providing a reliable basis for adjustment, and overcoming the defects of inaccurate collection and fuzzy recognition of traditional equipment.

This invention relates to a method for modeling audio response curves in a web environment, comprising the following steps: S1: Generating frequency and gain based on screen click events, and forming control points by user input of Q values; or obtaining three parameters—frequency, gain, and Q value—input by the user to form control points; S2: Converting the frequency, gain, and Q value of the control points into parameters of a Gaussian function and generating connection points, smoothing the connection points with a Bézier curve, and then drawing the audio response curve; S3: Mapping the Gaussian function parameters to a Web Audio API and obtaining a digital audio signal through a DSP algorithm, and then converting it into an analog audio signal. By simulating the peak value and gain characteristics of the audio response curve in local regions using a Gaussian function, a natural transition of the audio response curve in local regions is ensured; by using a Bézier curve to smoothly connect the Gaussian curves, a highly accurate and sufficiently smooth audio response curve is obtained.

This invention relates to the field of power system parameter monitoring technology and discloses a high-precision analysis method for electrical parameters based on a lightweight DSP algorithm, comprising the following steps: sampling and data buffering, lightweight DSP core processing, electrical parameter output, and code-level optimization. This invention suppresses spectral leakage through integer-cycle sampling combined with window functions, achieving harmonic measurement accuracy of ±0.5%. After Kalman filtering, data fluctuation is reduced by 80%, and steady-state accuracy is improved to within 0.1%, enabling high-precision measurement. Simultaneously, downsampling and integer operations reduce computational load, and code-level optimization keeps CPU utilization ≤15%, allowing it to run on low-cost MCUs such as the STM32F407.

The invention relates to the technical field of Beidou positioning, in particular to a high-precision Beidou orientation method, which comprises a central processing module arranged on Beidou orientation equipment, two Beidou baseband modules and two Beidou antennas, and the two Beidou baseband modules are respectively connected with the two Beidou antennas in a one-to-one correspondence manner. The central processing module comprises an ARM service processing unit and a DSP algorithm processing unit, communication connection is established between the ARM service processing unit and the DSP algorithm processing unit, the ARM service processing unit is respectively connected with the two Beidou baseband modules, data processing of the two cores is relatively independent by using a mode of an ARM core and a DSP core, and the two cores are respectively connected with the two Beidou baseband modules. Synchronous concurrent processing of data receiving and transmitting and data algorithms can be really realized; data interaction is carried out between the ARM service processing unit and the DSP algorithm processing unit in a memory sharing mode, and efficient data processing can be achieved.

A fitting device for a hearing aid earphone comprises an earphone main body and a remote controller, the earphone main body and the remote controller are connected through signals, and the earphone main body is internally provided with an MCU control unit, a DSP algorithm processor, a memory, a signal amplification processor, a microphone array gain regulator, an analog output gain regulator and a power supply module. Wherein the MCU control unit is in signal connection with a remote controller, is in output connection with the signal amplification processor, the microphone array gain regulator and the analog output gain regulator, and receives signal input of the memory and the DSP algorithm processor, and the power supply module supplies power to the earphone main body; the remote controller comprises a built-in MCU controller, a pure tone generation module, an LCD display screen and keys, the LCD display screen and the keys are arranged on a shell of the remote controller, the keys are connected to the input of the MCU controller, and signals of the MCU controller are output to the pure tone generation module and the LCD display screen.

The invention relates to the technical field of wireless communication, and provides a terahertz wireless communication system based on dual-polarization multiplexing and MIMO, which comprises a photon-assisted dual-polarization terahertz signal generator, a dual-polarization multiplexing MIMO frame and a structure receiving end digital signal processing module, and is characterized in that the system is combined with a dual-polarization multiplexing MIMO frame to improve the signal directivity and the transmission distance; and a receiving end adopts a total blind DSP algorithm to realize signal recovery without a pilot frequency sequence, and weights are allocated through an MIMO-MRC technology to merge two paths of signals. The system is suitable for 6G ultra-high-speed wireless access, space-air-ground integrated network and satellite communication scenes, optical fiber and wireless transmission advantages are fused through a photon-assisted technology, coherent destruction caused by a multipath effect is inhibited, polarization sensitivity is reduced, communication capacity and transmission distance are remarkably improved, and a reliable technical path is provided for Tbps-level communication in a terahertz frequency band.

The invention discloses a modularly designed mixed signal acquisition and processing system and method, and belongs to the technical field of mixed signal acquisition, the system comprises a core board, a bottom board and a pluggable module, the bottom board is provided with a programmable clock unit and a sampling trigger and data channel, the core board is provided with a DSP algorithm module, a storage and calibration management module and a peripheral output interface. The programmable clock unit is used for generating a reference clock, the sampling trigger and data channel is used for receiving a signal input by the pluggable module, and the DSP algorithm module is used for performing time domain and frequency domain processing on sampled data; the storage and calibration management module is used for storing configuration parameters, calibration data and operation logs, the pluggable module is used for realizing input conditioning or output conversion of signals, and the peripheral output interface is used for providing a control and synchronization interface for an external device. According to the invention, the signal processing precision and the real-time processing capability can be improved, the system cost is reduced, the maintenance convenience is improved, and the applicability is realized.