Low-frequency suppression signal output method and amplitude limiter

• Main Authors: YUAN ZHONGXING, TIAN LISHENG, XIONG WEI, PAAHO, JOUNI, CHANG QING, QIU CUNSHOU, ZHANG JING
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2024
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PHYSICS; SOUND-PRODUCING DEVICES

The invention provides a low-frequency suppression signal output method and an amplitude limiter, and the method comprises the steps: carrying out the filtering processing of an input signal through a first filter according to a current filtering parameter value, and obtaining an output signal; the signal selector selects a target signal from the input signal or the output signal and sends the target signal to the second filter; the gain controller performs gain adjustment on a received external first audio signal and sends an obtained second audio signal to the second filter; the second filter carries out filtering processing on a superposed signal of the received target signal and the second audio signal, and sends an obtained first signal to the signal processor; the signal processor obtains a filtering parameter value of the first filter according to the first signal and sends the filtering parameter value to the first filter, so that the first filter accurately adjusts the input signal according to the f