Systems and methods are described including dynamically configuring a shared buffer to support processing of at least two video read streams associated with different video codec formats. The generator includes an oscillator for producing a driving signal, and a charge pump for producing the high voltage from the power supply voltage based upon receiving the driving signal. After detection is complete, the direction of flow through the filter element is reversed, so that the filter material is rinsed clean. The chip has good compression strength in the radial direction and the heat-dissipating metal plate has higher tensile strength after being stretched and taking shape, providing a more stable structure and avoiding damage to the chip due to radially outward tension. There are tubular channels to the chamber so that the channels and the chamber constitute an acoustical filter for filtering the acoustical signal falling to the rear side of the microphone. When they touch each other, the switch connector goes to its closed state.