8 results about "Waveform coding" patented technology

Described herein is a method of waveform decoding, the method including the steps of:(a) receiving, by a waveform decoder, a bitstream including a finite bitrate representation of a source signal;(b) waveform decoding the finite bitrate representation of the source signal to obtain a waveform approximation of the source signal;(c) providing the waveform approximation of the source signal to a generative model that implements a probability density function, to obtain a probability distribution for a reconstructed signal of the source signal; and(d) generating the reconstructed signal of the source signal based on the probability distribution.Described are further a method and system for waveform coding and a method of training a generative model.

There is provided methods and apparatuses for decoding and encoding of audio signals. In particular, a method for decoding includes receiving a waveform-coded signal having a spectral content corresponding to a subset of the frequency range above a cross-over frequency. The waveform-coded signal is interleaved with a parametric high frequency reconstruction of the audio signal above the cross-over frequency. In this way an improved reconstruction of the high frequency bands of the audio signal is achieved.

The invention discloses a generator non-inductive access grid connection method and system, and relates to the technical field of intelligent non-inductive grid connection, and the method comprises the steps: comparing a membrane potential value with an activation threshold value, carrying out the multi-dimensional state evolution through a quantum tunneling probability regulation and control mechanism, and generating a grid connection triggering instruction signal; carrying out mechanical vibration waveform coding on the grid-connected trigger instruction signal by adopting a stress wave carrier mechanism, and transmitting the coded signal to a grid-connected circuit breaker through a low-voltage non-inductive conversion box to obtain an instruction confirmation signal and an execution time delay parameter; generating a frequency synchronous compensation parameter and a transient suppression strategy through a magnetic flux vortex adaptive optimization algorithm based on the instruction confirmation signal and the execution time delay parameter in combination with the frequency-phase collaborative deviation value of the power grid frequency and the generator frequency; according to the invention, a biological neuron pulse control model is combined with a quantum tunneling probability regulation and control mechanism, so that efficient conversion from a mechanical vibration signal to an intelligent control instruction is realized.

The application discloses a kind of bionic concealed underwater acoustic communication detection integrated method.Existing method does not consider the concealment of communication and detection jointly.The method of the present application first extracts click sound signal and whistle signal, and carries out power and correlation screening;Then the original click sound signal is waveform encoded and pulse position modulated, and the original whistle signal is time-frequency shape encoded and waveform parameter modulated.Using the good detection performance of bionic modulated signal, generate bionic communication detection integrated signal.In echo signal receiving end, different echo signal processing method is used.In communication receiving end, combined demodulation method is used.The bionic whistle signal generated by the present application has high similarity with the original signal in time domain, and the time-frequency profile is continuous.The present application can improve the communication rate by sampling combined modulation, has good concealment, not only can realize the accurate estimation of target distance, speed and azimuth, but also has good communication performance.

The application discloses an integrated control module, an IO interface circuit and a controller, wherein the integrated control module is configured to build a closed-loop control system in an analog domain, convert an electrical signal input by an IO interface into an analog input waveform by using a waveform encoder, synthesize the analog input waveform into a periodic time-division multiplexing analog input signal wave by using an input waveform multiplexer driven by a time sequence controller, generate an isomorphic analog setting signal wave by setting a waveform generator, directly analog subtract two waveforms by using a differential amplifier to obtain an analog differential signal wave, separate the analog differential signal wave into independent pulse error signals of each channel by using a synchronous demodulation and distribution unit in combination with a sample and hold circuit, and finally generate a driving signal by an analog PID controller. The application solves the problems of the synchronism and the integration of multi-loop control by using a unique analog domain time-division multiplexing and demodulation architecture, and provides a new hardware solution for high-performance real-time control.

To provide methods and apparatuses for decoding and encoding of audio signals.SOLUTION: In particular, a method for decoding includes receiving a waveform-coded signal having a spectral content corresponding to a certain subset of a frequency range above a cross-over frequency. The waveform-coded signal is interleaved with a parametric high frequency reconstruction of the audio signal above the cross-over frequency. In this way, an improved reconstruction of the high frequency bands of the audio signal is achieved.SELECTED DRAWING: Figure 1

The invention discloses an anti-interference laser radar system and method based on waveform coding and adaptive signal processing, and the system comprises a control and signal processing unit which is used for coordinating the work of the whole system, generating a coding sequence, and dynamically adjusting a coding strategy and filtering parameters according to environment feedback; the control and signal processing unit is electrically connected with the transmitting link and the receiving link; the transmitting link comprises a laser transmitting module, a programmable waveform coding modulator and a light beam shaping and scanning system which are sequentially arranged in the light path direction. The receiving link comprises a receiving optical module and a photoelectric detector which are sequentially arranged in the light path direction, and compared with the prior art, by combining waveform coding with matched filtering, extremely high processing gain and anti-jamming capability are obtained; by endowing the effective signal with the coding feature, the effective signal has uniqueness, so that co-frequency crosstalk caused by other laser radars can be suppressed, and distributed backscattering noise can be effectively filtered out.

The invention relates to the technical field of radars, in particular to an MIMO radar amplitude-phase response optimization waveform design method, which comprises the steps of obtaining a waveform coding matrix based on waveform codes of a plurality of transmitting channels of an initialized MIMO radar; constructing a comprehensive optimization objective function based on the waveform coding matrix; based on the comprehensive optimization objective function, performing iterative traversal optimization on each waveform code of the plurality of transmitting channels, and gradually updating each waveform code in each iteration so as to reduce the function value of the comprehensive optimization objective function; and when the optimization process meets a preset convergence condition, stopping iteration, and determining the current optimized waveform code as the transmitted waveform of the MIMO radar. According to the method, the high-resolution spectrum estimation performance and the anti-interference capability of the MIMO radar on the target can be remarkably improved.