30results about How to "Reduce high frequency components" patented technology

The invention discloses a de-interleaving method for correcting motion compensation by using errors and a device for realizing the method. The method steps of the present invention include detecting the difference between the original pixel and its corresponding motion compensation pixel in a spatial neighborhood of the pixel to be interpolated; using the difference to estimate the motion compensation error; using the estimated error to correct the motion compensate. The device for performing the method includes: an error detector for detecting the difference between several original pixels and their corresponding motion-compensated pixels; Modified compensator for motion compensation. The invention has less calculation amount, lower implementation cost, and greatly improves the effect of motion compensation.

The invention relates to a coordinating and smoothing control method for a wind turbine generator and an energy storing device and belongs to the technical field of safe and economical operation and control of a grid-connected wind power field. The method comprises the following steps: calculating the low-pass filtering cut-off frequency of the wind turbine generator, performing low-pass filtering on the output power of the wind turbine generator, calculating the high-pass filtering cut-off frequency of the energy storing device, performing high-pass filtering on power instruct of the energy storing device by adopting the cut-off frequency, outputting active power for power compensation of the wind turbine generator, and restraining the high frequency part of the output power of the wind turbine generator by the active power. The method not only is free of relatively largely modifying on a control strategy of the wind turbine generator, convenient in practical application, relatively slight in influence on the wind turbine generator stability and the wind energy utilization rate and capable of simultaneously effectively reducing the capacity and cost of the energy storing device, prolonging the service life of the energy storing device, and has a relatively good economic benefit.

The application provides a driving method and system of a voice coil motor, a camera module and a mobile phone. The controller receives configuration parameters through a communication interface, and generates control commands according to the configuration parameters. The waveform generation unit can then receive and generate a sinusoidal current waveform in response to the control command. The digital-to-analog converter receives and converts the sinusoidal current waveform in response to the control command, obtains a driving current corresponding to the sinusoidal current waveform, and outputs the driving current to drive the voice coil motor. In this way, by using the sine wave current waveform to output the corresponding driving current, thereby reducing the high-frequency component in the current waveform, the overshoot value of the VCM can be effectively reduced, and therefore, the serious overshoot phenomenon in the prior art when driving the VCM can be solved. , leading to the problem of long VCM harmonic oscillation time.