啸叫抑制方法、装置、音响及扩音系统

• Format: Patent
• Language: Chinese
• Published: 12.08.2025
• Subjects: ACOUSTICS; DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; MUSICAL INSTRUMENTS; PHYSICS; PUBLIC ADDRESS SYSTEMS; SPEECH ANALYSIS OR SYNTHESIS; SPEECH OR AUDIO CODING OR DECODING; SPEECH OR VOICE PROCESSING; SPEECH RECOGNITION

本申请实施例提供了一种啸叫抑制方法、装置、音响及扩音系统，涉及数字信号处理技术领域。该方法包括：对扩音系统中的音频信号进行预处理，将音频信号转换到频域；基于频域自适应滤波器的滤波器系数，对转换后的音频信号进行逐帧逐频点处理，得到相应的输出信号，同时以当前帧信号中的远端音频信号作为参考信号更新滤波器系数，供下一帧信号处理使用；将得到的所有输出信号转换到时域，得到目标音频。本申请实施例中，由于滤波器系数更新时的参考信号为远端信号，因此，不仅降低滤波器输入信号与参考信号的相关性，且能对反馈信号有效抑制。 The embodiment of the invention provides a howling suppression method and device, a sound box and a sound amplification system, and relates to the technical field of digital signal processing. The method comprises the following steps: preprocessing an audio signal in a sound amplification system, and converting the audio signal to a frequency domain; based on a filter coefficient of a frequency domain self-adaptive filter, processing the converted audio signal frame by frame and frequency point by frequency point to obtain a corresponding output signal, and updating the filter coefficient by taking a far-end audio signal in the current frame signal as a reference signal to be used for processing the next frame signal; and converting all the obtained output signa